130 R. W. CROSSKEY 



as third antennal segment. Head seen from in front with the facial ridges not 

 bowed apart; in profile the ridge very broadly visible. Epistome not or hardly 

 at all visible in profile and very weakly warped forwards from the face 



PEXOPSIS Brauer & Bergenstamm 



12 Ocellar setae absent. Apical scutellar setae virtually absent, represented by a 



pair of fine hairs variably oriented. Abdomen of o* with an area of fine close-set 

 hairing on the venter of T4. Eyes more or less totally bare . PUJOLINA Mesnil 

 [Running here are two undescribed Oriental species that Mesnil (personal 

 communication) considers to belong in his otherwise African genus Pujolina. 

 Their generic distinctness from Euhygia is rather doubtful.] 



- Ocellar setae present, strong. Apical scutellar setae strong and crossed, almost 



horizontal. Abdomen of o* without sexually modified hairing. Eyes with 

 short but obvious hairing ....... EUHYGIA Mesnil 



13 Ocellar setae strong (subequal to the anterior pair of reclinate orbital setae) and 



inserted in advance of the anterior ocellus. Basal node of i? 4 , 5 with one setula. 

 Scutellum with one pair of lateral setae. Abdominal T4 of o* with very large 

 dense hair-fascicles covering most of the venter. Subapical scutellar setae 

 separated by a distance about equal to, or only very slightly greater than, that 

 between a subapical seta and its corresponding basal seta. Apex of o* abdomen 

 not all shining black ZYGOBOTHRIA Mik (part) 



- Ocellar setae hair-like, almost absent, inserted behind the level of the anterior 



ocellus. Basal node of R i+b with two or three setulae. Scutellum with two 

 pairs of lateral setae. Abdominal T4 of $ without sexually modified hairing. 

 Subapical scutellar setae inserted very far apart, their bases separated by a 

 distance conspicuously greater than that between a subapical seta and its 

 corresponding basal seta. Abdomen of o* shining black on apical two-thirds 

 of T4 and all of T5 (abdomen rather pointed and T5 unusually small in relation 

 to T 4 as in Aplomya) .... WEINGAERTNERIELLA Baranov 



14 Three sternopleural setae (2 + 1). Ocellar setae strong ..... 15 



- Four sternopleural setae (2 + 2) (only three in some specimens of Isosturmia but 



then arranged 1+2). Ocellar setae absent or very weak and wiry or hair-like 

 (except strong in Zygobothria) ......... 16 



15 Second sa seta reduced, weaker than the pra seta. Apical scutellar setae horizontal. 



Abdomen of <$ with a pair of long dense hair-fascicles on venter of T4. Antennae 

 entirely black-brown; palpi blackish. Black forms with rather shining thorax, 

 abdomen extensively covered with thick white pollinosity on T4 and T5 



CADURCIA Villeneuve 



- Second sa seta normal, as strong as or stronger than the pra seta. Apical scutellar 



setae usually directed half-upwards. Abdomen of q* without hair-fascicles or 

 modified hairing. Antennae with second segment and base of third orange; palpi 

 yellow. Not black forms, thorax greyish pollinose, abdomen with mainly reddish 

 yellow ground colour and yellowish pollinosity basally on each tergite 



THELAIRODRINO Mesnil 



16 Basal node of R i+i with three or more setulae. Vibrissae slightly above the 



epistomal margin in o\ about level with it in $. Ocellar setae absent or minute. 

 Apical scutellar setae directed strongly upwards. Abdomen of <J with a pair 

 of very dense hair-patches of long convergent hair on venter of T4 



ISOSTURMIA Townsend 



- Basal node of ^? 4 + 5 with one strong setula (very rarely accompanied by a minute 



supernumerary hair). Vibrissae usually well above the epistomal margin in 

 both sexes. Ocellar setae varied. Apical scutellar setae horizontal or directed 

 only slightly upwards. Abdomen of <$ with or without hair-patches on venter 

 ofT 4 17 



1 7 Ocellar setae very strong, subequal in size to reclinate orbital setae, inserted slightly 



