42 
Bulletin of Laboratories of Denison University [Voi. xi. 
Anthophorula^ Ckll., is like a small Podalirius, but has only two submarginal 
cells. Tip of marginal cell away from costa. 
Oxaa, Klug., differs from Megacilissa in that the first recurrent nervure unites 
with the second transverso-cubital instead of with the first. The labrum 
is very large, and the eyes in the males strongly converge above. 
Exomalopsis^ Spin., will run in Cresson’s table to Nomta, but it is a long-tongued 
bee, in no way related to Nomia. The species are short and compact, 
shiny, with a very large loose scopa on the hind legs of the females. 
Family. ANDRENID^. 
Subfamily. PROSOPIDIN^. 
COLLETES. 
Large, Andrena-YxV^ species, with dark, often scarcely banded abdomen 
in the 9 ........ i 
Large, $ only known, black hairs on dorsum of thorax, very large punctures 
and five white hair-bands on abdomen. Length about 15 mm (Gila 
R., July.) ...... gtlensis, Ckll. 
Smaller species, with banded abdomen, .... 3 
1. No dark hairs on thorax. (Mesilla Valley, March.) utilise Ckll. 9 * 
With dark hairs on thorax .... 2 
2. Teguloe piceous, punctuation very strong and close, wings 
smoky. (Sacramento Mts., October,) . bigelovia, Ckll. 9 • 
Tegulge rufo-testaceous, punctuation not so close, wings 
perfectly clear. (Mesilla Valley, late summer.) 
ar?nata, Patton. 9 • 
3. Distance between eyes and base of mandibles greater than 
breadth of latter; no black hairs on thorax . 4 
Distancejbetween eyes ead base of mandibles less than 
breadth of latter, ..... 5 
4. About 10 mm. long, pubescence of thorax tinged with 
ochreous. (Sacramento Mts, and Mesilla Valley, July.) 
. . . . woo/oni. Ckll. ^ . 
About 7 mm. long, pubescence white or greyish-white, not 
at all ochreous, (Mesilla Valley, June.) . datecs, Ckll , 
5. Dorsum of thorax with some black hairs ; length about 10 
mm. (Mesilla Valley, May, at willow blossom.) 
. . . . texana^ Cress, 9 • 
Thorax without black hair, .... 6 
6. Pubescence of thorax short, the hairs stout, pubescent, 
moss-like; length about ii mm. (Santa F6, July.) 
.... aberranSy Ckll., 9 • 
Pubescence of thorax normal, ... 7 
7. Flagellum ferruginous beneath, tarsi ferruginous ; small 
species. (Mesilla Valley, May, at ffowers of mesquite.) 
prosopidisy CkW.y $. 
8 
Flagellum dark, 
