bombylildtE. 175 



Table of Subfamilies. 



1. Prasfurca comparatively long, 2nd longitu- 



dinal vein originating in knee-shaped form 

 from it, approximately opposite anterior 

 cross-vein (at most half-way between 

 origin of preef urea and the cross-vein, and 

 this only in some species of Argyrarnceba);* 

 antennae widely separated at base ; frons 



in <$ nearly as wide as in 5 Anthracinje, p. 176. 



Prsefurca comparatively short, 2nd vein ori- 

 ginating acutely (not in knee-shaped form), 

 always much nearer origin of prsefurca 

 than of anterior cross-vein ; antennae 

 nearly always approximate at base ; eyes 

 in J normally contiguous or nearly so, 

 sometimes distinctly separated, but irons 

 always much narrower than in 2t 



2. Abdomen, hind legs, and antennae conspi- 



cuously long; eyes normally contiguous 

 in both sexes ; only three posterior cells ; 

 thorax not unusually humped; occiput 



concave ; bare species SYSTROPiNiE, p. 289. 



Abdomen, legs, and antennae (taken together) 

 not conspicuously long; eyes normally 

 contiguous in J, wide apart in 2 ; pos- 

 terior cells usually four ; thorax often 

 considerably humped ; occiput generally 

 inflated ; bare, moderately or densely 

 pubescent species 3. 



3. Abdomen rounded or oblong ; often furry ; 



antennae never conspicuously long 4. 



Abdomen more or less cylindrical, bare or 

 with bristly hairs ; antennae very long, 

 especially 1st joint; proboscis nearly 

 always long. (Thorax more or less 

 bumped, generally with conspicuous 

 bristles ; abdomen drooping ; prothorax 

 sometimes forming a shield ; body often 

 with scaly pubescence) , . ToxoPHORiNiE, p. 286. 



4. Abdomen short and rounded; thorax and 



abdomen generally with dense furry pu- 

 bescence ; proboscis long and with small 

 labella; t thorax generally arched ; 2nd 

 longitudinal vein never with a strong loop 

 near tip ; head generally narrower than 



thorax Eombyliin^:, p. 259. 



Abdomen oblong, rather flattened, seldom 

 really furry ; proboscis generally short 

 and Avith larger labella ; thorax generally 



* At least two (European) exceptions are known, Callistoma and Mulio. 

 t Some species of Usia have the eyes in the tf widely separated, but they 

 are easily recognised by their short, rounded bare abdomen. 

 | Except in a few non-Oriental genera. 



