133 



8 (3) Basal alxloniinal segment without black bristles 



laterally. (Abdomen dull metallic screen or at least 

 submetallic, tarsi apparently variable, either black- 

 er dark above or yellowish.) fscudophancs. 



9 (2) Small cross-vein far before the middle of the upper 



side of the discal cell (Abdomen shining, blue- 

 black) iiyctias. 



\o (I) Wings with a ])igmented stigma. 



1 I (42) Males. 



12 ( 13) Stigma enclosed bv a cross-vein at the base 



l!cfcros/iL:;iiiiis. 



13 (12) Stigma not enclosed at base. 



14 (15) Legs, except coxae and the ap^^al joint of tarsi, yel- 



low, unicolorous or nearly so vauihocncnii^. 



15 (14) Legs more or less black or dark, at least on the 



femora. 



16 (T,'/) Antennae with the third joint always acutely pointed 



at apex, usualh- acuminately produced. 



17 (26) Wings with the tl ird and fourth costal segments sub- 



equal, or with the fourth never much shorter than 

 third, sometimes the fourth is the longer. 



18 (21) Basal abdominal segment at the sides with a short 



line of distinct black bristles, whi-ch are obviously 

 dilTerent from any other hairs on the abdomen. 



Kj (20) Thorax and abdomen with fuscous tomentum; liypo- 

 pygium above with a deep narrow channel on the 

 right side cniciator. 



20 (19) Thorax and abdomen mostly black or blackish, the 

 latter with whitish lateral tomentose spots; hypo- 

 pygium on the right side at the tip with a more or 

 less ovate dull area of peculiar texture. . . .ciicalypti. 



2\ (18) Basal abdominal segment without any special bristles 

 at the sides; if hairy, then the hairs are similar to 

 the general clothing. 



22 {2},) Whole l)ody with pale erect soft hairs, which are 



long and conspicuous ciifncJiodcs. 



23 {22) Body not so clothed; hairs, where present, short and 



inconspicuous. 



24 (25) Scutellum with a marginal fring;e of fine, but (,|uite 



distinct hairs; abdomen for the most part blackish 

 on the dorsum, the surface not concealed under 

 dense tomentum bciicficicns. 



