SOME SPECIES OF THE BEE GENUS COELIOXYS. 
By J. C. CRAwForD. 
This paper discusses only species occurring in America north 
of Mexico and no table to separate the males has been included 
since Prof. T. D. A. Cockerell published a table for this sex in 
the Canadian Entomologist for June, 1912, pp. 167-170. The 
key to the females includes all the species for the region under 
consideration in which the female sex has been described. In 
the table here presented the characters used for separating 
rufitarsis Sm. from comstocki Cress. and lucrosa Cress. from 
moesta Cress. are the characters used by Prof. Cockerell in a 
table to separate the types of the Cressonian species and some 
non-Cressonian species which he consulted in the collection 
in Philadelphia. The illustrations were made with a camera 
lucida, attached to-a Zeiss binocular microscope. 
1. Last ventral segment not notched laterally, at most emarginate and 
the part anteriad of the emargination not pointed.................. 2 
Last ventral segment notched, the part anteriad of notch sharply pointed. .19 
2. Last dorsal segment with the end upturned into a small spicule............ 3 
Bastidorsalssesment not upturmed aitvapexs ys aaa ace eee ern ee 7 
3. Last dorsal segment very sparsely punctured at base...... obtusiventris n. sp. 
wast dorsalesecinent closely, punctured at bases... eee eee ee eee + 
4. Punctures of first dorsal abdominal segment separated by less than a 
punctunedwidila yay waren he ee ions aya cue Pcie cent oe es ber tele eer SL eran mee sree 5 
First dorsal abdominal segment sparsely punctured...................... 6 
5. First recurrent vein received by second submarginal cell almost half as 
far from base as length of first transverse cubital in the o and slightly 
TeSG Pia <= piesa Sera ree Pept ies AESc ieee pie coe ea ea eect we WES gilensis Ckll. 
First recurrent vein received by second submarginal cell one-third or 
less as far from base as length of first transverse cubital in @ and 
Sill bol Lesioks bois tite sah ek en Wiebe rt RGN Ph Ite he Se atte y deani Ckll. 
6. Here run modesta Sm. and scitula Cress., the descriptions affording no 
points for separation. 
7. Last ventral segment towards apex with a long strong fringe of hairs 
alone Margin... Ae osa Sake cave Fees ORE aed es De he ce ee 8 
Hast. ventral segment not, strongly fringed ys.-..42c- 4.0 eee 12 
ts eae 31D 25a 0) (21 6) gee a re a ae ae ALA eh RRR TE Sen Fn tere reer per aco Onatc cue 9 
begs except. coxae,: ted iy: shh toss Gee EER ao nO ee 11 
9. Last dorsal segment without a median carina or this only indicated 
Ch AG] OP ae Roane terete ae eh ayant earns iy ih bis WR Mn eens be ceded ade. 10 
Last dorsal segment with a median carina...................-.- angelica Ckll. 
10. Penultimate ventral segment with small punctures interspersed among 
the dargersonesy See ean acs See gee ee See Eee ee apacheorum Ckll. 
Penultimate ventral segment without smaller punctures among the 
Othersit Fhe Ale Peg Meirs, eels a ee cee ee EE toner at alternata Sm. 
11. Fourth antennal joint distinctly longer than third; last ventral segment 
with subparallel sides and a broadly rounded apex........ texana Cress. 
Fourth antennal joint hardly longer than third; last ventral segment 
with the sides converging apically and apex more narrowly rounded. 
hunteri n. sp. 
148 
