Agrilus otiosus

Macrae, Ted C., 2003, Agrilus (s. str.) betulanigrae MacRae (Coleoptera: Buprestidae: Agrilini), a new species from North America, with comments on subgeneric placement and a key to the otiosus species-group in North America., Zootaxa 380, pp. 1-9 : 7-8

Key to males of the Agrilus otiosus species­group in North America

1 Antennomeres with long white setae beneath; Hosts: Fagus , Quercus ................... ................................................................................................... A. crinicornis Horn

­ Antennomeres without long white setae beneath .................................................. 2

2 Fifth abdominal ventrite fimbriate at apex; Host: Quercus ..... A. defectus LeConte

­ Fifth abdominal ventrite not fimbriate ................................................................... 3

3 Prosternum conspicuously pubescent .................................................................... 4

­ Prosternum not conspicuously pubescent .............................................................. 8

4 Genitalia with parameres parallel, not expanded medially .................................... 5

­ Genitalia with parameres distinctly expanded medially ........................................ 6

5 Pronotum with prehumeral carinae distinct; apical prosternal margin distinctly emarginate; genitalia with parameres very narrow apically; Host: Juglans ............. ........................................................................................................ A. cliftoni Knull

­ Pronotum with prehumeral carinae obsolete; apical prosternal margin truncate or onlyslightlyemarginate;genitaliawithparameresslightlywidenedatapex;Host: Quercus A. geminatus (Say)

6 Front of head densely clothed with white hairs behind epistoma, nearly concealing suface; genitalia with parameres not transparent apically; pronotum bicolored dorsally; Hosts: Carya , Juglans , Sassafras ............................................ A. otiosus Say

­ Front of head sparsely clothed with white hairs behind epistoma; genitalia with parameres transparent apically; pronotum not bicolored dorsally ......................... 7

7 Genitalia with apex of median lobe obtuse; parameres angularly expanded near middle and densely punctured on ventral surface; Host: Carpinus ......................... .................................................................................................... A. ohioensis Knull

­ Genitalia with apex of median lobe acute; parameres slightly expanded before api­

ces, not densely punctured on ventral surface; Host: adults collected on Corylus .. ................................................................................................... A. atricornis Fisher 8 Second abdominal ventrite transversely concave, causing the abdomen to be bent downward in lateral view; Host: Juglans ............................ A. transimpressus Fall

­ Second abdominal ventrite not transversely concave, at most slightly concave near middle or with a deep longitudinal median channel .............................................. 9

9 Genitalia with fleshy lobes at apex of parameres that protrude beyond apex of median lobe; first two abdominal ventrites channeled medially; Host: Ostrya ....... ....................................................................................................... A. osburni Knull

­ Genitalia without protruding fleshy lobes at apex of parameres; first two abdominal ventrites convex, feebly flattened, or slightly concave medially ................... 10

10 Apical prosternal margin broadly emarginate ...................................................... 11

­ Apical prosternal margin broadly rounded or feebly emarginate ........................ 12

11 Genitalia with parameres elongate, subparallel, tips not transluscent; fifth antennomere about as long as wide; Host: Diospyros ....................... A. diospyroides Knull

­ Genitalia with parameres arcuately expanded near middle, tips transluscent; fifth antennomere nearly twice as long as wide; Host: unknown ......... A. hazardi Knull

12 First two abdominal ventrites convex medially; genitalia with parameres subangularly expanded near middle, parallel toward apex; Host: Juglans ........................... ..................................................................................................... A. juglandis Knull

­ First two abdominal ventrites feebly, longitudinally flattened medially; genitalia with parameres expanded in apical half, parallel toward apex or not ................. 13

13 Genitalia in lateral view bent sharply downward in basal half; parameres subquadrately expanded in apical half, angled obliquely downward laterad, narrowed suddenly before apex; Host: Betula ............................. A. betulanigrae MacRae n. sp.

­ Genitalia in lateral view not bent sharply downward in basal half; parameres arcuately expanded in apical half, converging evenly toward apex; Host: Quercus ...... ........................................................................................................... A. frosti Knull