Agrilus

Hespenheide, Henry A., Westcott, Richard L. & Bellamy, Charles L., 2011, Agrilus Curtis (Coleoptera: Buprestidae) of the Baja California peninsula, México, Zootaxa 2805, pp. 36-56 : 53-54

Key to Agrilus known or likely to occur (*) on the Baja California peninsula

1. Antennae serrate beginning with antennomere 4............................................................. 2

- Antennae serrate beginning with antennomere 5............................................................ 13

2. Elytra irregularly patterned with yellow and/or white setae and with distinct longitudinal costae; elytral apex truncate, some- times obliquely so, irregularly and coarsely spinose; Cape Region...................................... lucanus Fall

- Elytra with spots or vittae of setae or uniformly and inconspicuously setose, with or without distinct longitudinal costae; elytral apices usually more or less rounded...................................................................... 3

3. Each elytron with a distinct longitudinal costa, internal to which the surface is densely pubescent almost to suture, in contrast to sparsely pubescent externally; color dull dark greenish; host willow............................. fisherianus Knull *

- Elytra without or with only a vague costa on each elytron, but without a wide pubescent strip internally; color blackish, pur- plish, bronzy, or green................................................................................. 4

4. Each elytron with two weak costae; very robust species over 9 mm, usually over 10 mm long......................... 5

- Elytra without or with only a single vague costa on each elytron................................................ 6

5. Blue (female), or variably green, coppery, or purplish (male); elytra with distinct round white pubescent spots................................................................................................ walsinghami Crotch

- Dark bronzy brown; elytra without pubescent spots....................................... fisherellus Obenberger *

6. Front of head with a very deep, wide sulcate median longitudinal depression extending from vertex to clypeus; abdominal ven- trites with anterolateral patches of long setae that contrast markedly with remaining surface; color variably bluish, greenish, reddish or purplish..................................................................................... 7

- Front of head without or with only a moderately deep, not sulcate, median depression that attenuates above; abdominal ven- trites not as above.................................................................................... 8

7. Above, sexually dichromatic, variably bluish, greenish, purplish or reddish; usually bicolored, although females may be entirely green; pygidium usually strongly carinate; known only from BCS and a single pair from near Cataviña, BCN................................................................................... inhabilis inhabilis Kerremans

- Both sexes deep matte green above; pygidium usually weakly or indistinctly carinate.... inhabilis chalcogaster Va n D yk e *

8. Pygidium with a strongly projecting median carina........................................................... 9

- Pygidium without a projecting median carina.............................................................. 10

9. Purplish or bronzy, each elytron with a more or less distinct medial sutural pubescent spot or line that may be absent; sides beneath uniformly densely setose; host willow.................................... quadriguttatus niveiventris Horn

- Blackish, with three pale yellow or darker golden spots of setae on each elytron; sides beneath, weakly setose; host oak........................................................................................ auroguttatus Schaeffer

10. Elytra with yellowish pubescent spots, host acacias; known only from BCS....................... detractus Waterhouse

- Elytra without pubescent spots.......................................................................... 11

11. All tarsal claws more or less shallowly cleft with the inner teeth not at all turned inward, their tips widely separated; color vari- able, usually purplish, greenish or bluish, male usually not bicolored; host willow......................... politus (Say)

- At least the anterior tarsal claws feebly or deeply cleft with the inner teeth turned inward and their tips narrowly separated; at least male bicolored, with pronotum coppery or greenish and elytra brown or blackish; hosts oak or manzanita......... 12

12. Male with claws on protarsi feebly cleft, inner tooth not distinctly broader than outer one and broad toward apex; hosts manza- nita and madrone............................................................................ arbuti Fisher

- Male with claws on protarsi deeply cleft, the inner tooth not distinctly broader than outer one and acute at apex; host oak............................................................................................. angelicus Horn

13. Pronotum gibbose; elytra with broad pubescent sutural vittae....................................... gibbicollis Fall

- Pronotum not gibbose; elytra with or without pubescent vittae or spots.......................................... 14

14. Elytra uniformly setose, without pubescent spots or vittae, not dark coppery red in color............................ 15

- Elytra with pubescent spots or vittae; if vittae indistinct then denser along suture than at margins and dark coppery red in color................................................................................................... 19

15. Uniformly blue to green, or aeneocupreous; posterior margin of metacoxae distinctly sinuate; larger species 4.00 – 7.50 mm in length.............................................................................................. 16

- Black or dark brown, elytra sometimes with slight coppery or purplish reflection; or bicolored, with the pronotum black, greenish or coppery; posterior margin of metacoxae more or less truncate; smaller species 2.90 to 5.30 mm in length.......... 17

16. Uniformly bluish to greenish; known throughout the peninsula...................................... lacustris LeC.

- Uniformly aeneocupreous; known only from the Algodones Dunes, Imperial Co., California............ harenus Nelson *

17. Bicolored, the pronotum greenish or coppery, the elytra black, sometimes with coppery or purplish reflections; front of head with a dull metallic rounded smooth fovea on each side at middle by eye; adults on Amorpha fruticosa ; northern BCN........................................................................... parvus californicus Westcott & Nelson

- Unicolorous black or dark brown, sometimes with slight coppery reflections, or bicolored, with the pronotum black and the elytra brown; front of head without foveae; adults on other leguminous trees and shrubs of BCN and BCS.............. 18

18. Prosternal lobe transverse or only slightly indented at middle, prosternum and midline of mesosternum of male with moderately dense long erect setae, male genitalia (Fig. 53) with parameres on apical 1/2 each narrower than distance between them, margins of median lobe somewhat convergent to narrowly rounded, at most subtruncate apex.............. abstersus Horn

- Prosternal lobe conspicuously, broadly emarginate, prosternum and midline of mesosternum of male with sparse short recumbent setae, male genitalia (Fig. 56) with parameres on apical 1/2 each at best subequal to distance between them, margins of median lobe parallel to truncate apex..................................................... peninsularis Van Dyke

19. Elytra with elongate or rounded pubescent spots (sometimes small and abraded)................................... 20

- Elytra with entire or interrupted pubescent vittae............................................................ 23

20. Head with front convex, but narrowly, distinctly depressed along midline; size larger, length 3.70–6.70 mm (average ca. 5.50 mm).......................................................................... paraimpexus Hespenheide

- Head with front convex or somewhat flattened, but without depression; size smaller, length 3.00– 4.80 mm (average <4.00 mm).............................................................................................. 21

21. Pronotum with marginal and submarginal carinae separated for their entire length; lateral portions of first two abdominal segments broadly visible from above, the first heavily pubescent................................. pectoralis Waterhouse

- Pronotum with marginal and submarginal carinae not separated for their entire length, the latter joining the former just before hind angles; if lateral portions of first two abdominal segments visible from above, both are conspicuously pubescent.... 22

22. Pronotum with strong prehumeral carinae................................ barri Hespenheide & Westcott , new species

- Pronotum without prehumeral carinae........................... argythamniae Hespenheide & Westcott , new species

23. Pronotum without prehumeral carinae; elytral pubescent vittae interrupted....................................... 24

- Pronotum with prehumeral carinae; elytral pubescent vittae usually entire....................................... 25

24. Strongly purplish or reddish above; elytral vittae prominent; larger species, length> 5 mm; BCN........... blandus Horn

- Black; elytral vittae not prominent; smaller species, length <4 mm; BCS. interstitialis Hespenheide & Westcott , new species

25. Pronotum without median depression, strongly convex; elytral vittae prominent or indistinct........................ 26

- Pronotum with more or less distinct median depression; elytral vittae never distinct............................... 27

26. Ventral surfaces and lateral margins of pronotum with dense setae; pronotum coarsely rugose; elytral vittae prominent.................................................................................................. felix Horn

- Ventral surfaces and pronotum without conspicuously dense setae; pronotum scabrous; elytral vittae indistinct..................................................................................................... hualpaii Knull

27. Pronotum with marginal and submarginal carinae joined for basal 1/4; dorsal portions of abdominal ventrites equally very narrow...................................................................................... jacobinus Horn

- Pronotum with marginal and submarginal carinae separated for their entire length or joined just at base; dorsal portions of abdominal ventrites broad.............................................................................. 28

28. Front of head and lateral portions of pronotum conspicuously setose; pronotum with marginal and submarginal carinae separated for their entire length; adults on Lotus spp..................................................... illectus Fall

- Front of head and lateral portions of pronotum inconspicuously, uniformly short setose; pronotum with marginal and submarginal carinae joined at base...................................... vescivittatus Hespenheide & Westcott , new species