314 T. D. A. COCKERELL. 



2. Hind margin of first abd. s. with a band (usually interrupted) of pubescence. ..3. 

 Hind margin of first abd. s. without any band of pubescence, hut there is an 



interrupted band in the middle, representing the anterior part of the 

 usual ornamentatiou ; abdomen more pointed than usual posteriorly; 

 area on fifth segment small, semilunar, the segment itself small ; sec- 

 ond s. m. broader below than the first (Ega). . . -vagans Sm. 9 (T.). 



3. Median black area of first abd. s. not produced laterally; pubescence on sec- 



ond segment at sides forming approximately right angles on inner 

 side ; size large (like remigatus, etc.) ; legs black, spurs black ; last ven- 

 tral segment directed downwards at tip; wings strongly violaceous; 

 clypeus with numerous minute punctures and sparse large ones. 



nigriceps Sm. 9 (T.). 

 Median black area of first abd. s. produced laterally 4. 



4. Legs black 5. 



Legs red or nearly so 6. 



5. Pubescence of abdomen greyish white, without any yellowish tint. 



douatus Sm. (T.). 



Pubescence of abdomen decidedly yellowish white on first two segments, but 



not so on apical half I epanecus Cressou. 



6. Anterior arms of pubescence on first abd. s. not at all approaching, their inner 



angle with the posterior baud (which is continuous in the middle) 

 sharp; silvery area on fifth segment short. 



flavofasciatus Sm. (T.). 



Anterior arms of pubescence on first abd. s. more or less approaching, or 



almost touching 7. 



7. Lateral projections of black area on first abd. s. rounded ; wings nearly clear. 



occidentalism Cresson. 



Lateral projections of black area on first abd. s. sharply pointed ; wings greatly 



darkened in I repidus Sm. (T.). 



Robertson has stated that E. zonatus is a synonym of E. scutel- 

 laris Say. It is not at all like the species labelled (I believe quite 

 correctly) scutellaris in the Museum. 



Triepeolus nigriceps (Sm.) runs in my New Mexico table to " E. 

 robustus " (i. e. nevadensis), but differs by the fifth abd. s. being 

 wholly without patches of light pubescence. It has a tuft of black 

 hair, but no strong prominence, between the antennae. The ante- 

 rior part of mesothorax is broadly margined with light pubescence, 

 this being narrowly interrupted in the middle, and on each side of 

 the middle sending a short tongue backwards. 



RHATHYMITS Lepeletier. 

 For the sake of comparison, I include in my table Eurytis fune- 

 rens, which looks just like a Rhathymus. 



Abdomen red 1. 



Abdomen black 2. 



