Hemipyxis yui Lee and Staines

Lee, Chi- Feng & Staines, Charles L., 2009, Hemipyxis yui, A New Species From Taiwan, With Redescription Of Its Allied Species H. quadrimaculata (Jacoby, 1892) (Coleoptera: Chrysomelidae: Galerucinae), The Coleopterists Bulletin 63 (1), pp. 62-70 : 66-69

Key to Taiwanese Species of the Genus Hemipyxis Dejean

(modified from Kimoto and Takizawa 1997)

1. Elytron entirely greenish to blackish-blue................................... 2

19. Elytron not entirely greenish to blackish-blue.............................. 4

2. Body length larger than 4 mm ................................................ 3

29. Body length shorter (2.0– 2.8 mm); head, pronotum and scutellum shining black; elytron blackish-blue; ventral surface entirely pitchyblack; antenna dark brown with four basal antennomeres much paler; legs dark to pale reddish-brown........................... H. changi Kimoto

3. Legs mostly brownish; head dark reddish-brown to pitchy-black with vertex black; pronotum and scutellum black; elytron greenish to blackish-blue; antenna pitchy-black with two or three basal segments more brownish; ventral surfaces of thorax blackish; abdomen yellowishbrown; legs yellowish-brown with tarsi, dorsal surfaces of anterior and middle femora and apical portion of posterior femur blackish; length 4.8–5.8 mm ................................................. H. flavipes Kimoto

39. Legs entirely black; head and pronotum black; antenna black with basal antennomeres brownish; abdomen entirely yellowish-brown; elytron blue; length 6.0– 6.3 mm ........................... H. flaviabdominalis Chûjô

4. Elytron without a distinct apico-lateral costa............................... 5

49. Elytron with a distinct apico-lateral costa; generally dark reddish-brown; elytra generally pitchy-black; legs with tibiae and tarsi pitchy-brown to black; antenna pitchy-black with basal antennomeres brownish; in dark colored specimens vertex and pronotum pitchy-brown and elytron generally pitchy-black and in most dark colored specimens dorsal surfaces entirely pitchy-black; length 3.6–4.1 mm. H. apicicostata Kimoto

5. Pronotum entirely yellowish to reddish-brown.............................. 6

59. Pronotum entirely shining black; head and scutellum black; elytron yellowish-brown with sutural and lateral margins blackish; in some

68 specimens elytron entirely brownish; antennae and legs entirely pitchyblack; abdomen dark brown; length 5.0 mm........ H. yasumatsui Kimoto

6. Elytral epipleuron distinct at apex of suture................................ 7

69. Elytral epipleuron not distinct at apex of suture........................... 9

7. Elytral epipleuron distinct at apex of suture, and interior and exterior margins united at apex of suture............................................. 8

79. Elytral epipleuron wide even to its extremity, and interior and exterior margins not united at apex of suture; dorsum yellowish-brown; antenna pitchy-black with two or three basal antennomeres brownish; length 6.2– 6.8 mm ................................................ H. taihorinensis Kimoto

8. Antenna dark yellowish-brown with apical antennomeres somewhat infuscate; elytron with punctures finely impressed; dorsum yellowishbrown; length 4.5–5.7 mm .............................. H. liukuiana Kimoto

89. Antenna generally pitchy-black with basal two antennomeres brownish; elytron with punctures distinctly impressed; dorsum yellowish; length 4.2–4.5 mm ............................................... H. persimilis Kimoto

9. Elytron with punctures strongly impressed................................. 10

99. Elytron with punctures finely impressed.................................... 14

10. Elytron with distinct markings.............................................. 11

109. Elytron entirely yellowish to pitchy-black; head and pronotum yellowish to dark-brown; antenna pitchy-brown with four or five basal antennomeres brown; length 3.3–3.9 mm ...................... H. rarashana Kimoto

11. Elytron with a post-median marking yellowish brown.................... 12

119. Elytron pitchy-black with anterior and posterior markings yellowishbrown; head and pronotum reddish to yellowish-brown; antenna black with three basal antennomeres brownish................................... 13

12. Elytron reddish with a large post-median marking yellowish-brown, in most specimens the marking bordered by a blackish margin; head, pronotum and scutellum reddish-brown; ventral surfaces reddish; antenna pitchy-black with two basal antennomeres brownish; legs entirely reddish-brown; length 4.0– 4.2 mm .............. H. takedai Kimoto

129. Elytron pitchy-black with a yellowish-brown marking behind middle, and with posterior margin reddish-brown; head, pronotum, and scutellum yellowish to reddish-brown; ventral surface reddish; antenna black with three basal antennomeres deep yellowish-brown; legs entirely reddish-brown; length 4.0– 4.5 mm .................... H. formosana (Chûjô)

13. Elytron with anterior margin of basal spot located on basal margin....................................................... H. quadrimaculata (Jacoby)

139. Elytron with anterior margin of basal spot located near middle.................................................... H. yui Lee & Staines , new species

14. Elytron with lateral margin widely brown.................................. 15

149. Elytron with lateral margin widely blackish; head and pronotum yellowish to reddish-brown; elytron black with two yellowish brown spots, one situated subbasally and the other subapically; antenna black with three basal antennomeres reddish-brown; length 4.0–5.0 mm........................................................................... H. quadripustulata (Baly)

15. Dorsal surfaces not entirely yellowish-brown.............................. 16

159. Dorsal surfaces entirely yellowish-brown................................... 17

16. Elytron black with lateral and apical margins together with subbasal marking yellowish-brown, in some specimens yellowish marking reduced as a very small spot, but in some specimens the marking much developed and reached to either lateral or sutural margin; head and pronotum yellowish-brown; antenna pitchy-black with two ore three basal antennomeres brownish; length 4.2–4.5 mm ................. H. balyi (Bates)

169. Elytron reddish-brown with sutural margin and lateral stripe blackish, and median stripe and lateral margin widely ochraceous; head and pronotum reddish-brown; antenna pitchy-black with on ore two basal antennomeres brownish; legs reddish-brown; length 3.5–4.5 mm ....................................................................... H. lineata Kimoto

17. Interocular space wider than a transverse diameter of eye; antenna pitchy-black with basal antennomeres brownish; length 3.0–4.0 mm............................................................... H. nigricornis (Baly)

179. Interocular space as wide as a transverse diameter of eye; antenna with apical antennomeres darkened; length 4.0– 4.8 mm ............................................................................... H. fulvoculata Takizawa