So ENTOMOLOGICAL NEWS. [March, '02 



band, anterior margin of clypeus more regularly truncate, 

 segment 5 of abdomen more densly punctured, hind tibiae more 

 coarsely punctured. In O. albiventris $ the anterior margin 

 of clypeus presents two lateral teeth and a median emargina- 

 tion, so that it appears somewhat quadridentate, the last joint 

 of antennae relatively shorter, the enclosure of metathorax 

 more blackish, more uniformly finely rugose, without the su- 

 perior transverse series of rugosities. Of the four female types 

 examined one belongs to O. pumila. 



Nomada bella Cr. 



Nomada bella Cresson, Proc. Ent. Soc. Phil, ii, 287, cr>, 1863. 



Nomada maculata Cresson, ibid. 303, $ . 



Nomada maculata Robertson, Trans. Am. Ent. Soc. xx, 275, d\ 



1893- 



I have examined all except one of the type specimens. The 

 mandibles are bidentate. In the original description of N. 

 maculata were included some doubtful males and some appar- 

 ently doubtful varieties. 



Nomada simplex sp. nov. 



Nomada bella Robertson (not Cresson), Trans. Acad. Sci. St. 



Louis vii, 340, 9, 1897. 



<j\ Black, apical segment of abdomen ferruginous ; head and thorax 

 densely punctured, clothed with long and rather dense pubescence ; joints 

 of flagellum slightly denticulate at apex beneath ; scutellum hardly sub- 

 bilobed, unusually low ; apical segment bifid ; mandibles, clypeus, lab- 

 rum, inferior orbits in front, scape in front, tubercles, and fasciae on ab- 

 dominal segments 1-6, lemon-yellow ; the fasciae more or less narrowed 

 or notched medially in front, sometimes interrupted, behind with an in- 

 dentation on each side, which on segment 5 sometimes passes through 

 the fascia, leaving a spot on each extreme side ; tegulae lemon-yellow or 

 yellowish ferruginous ; flagellum beneath reddish testaceous ; anterior 

 and middle legs yellow, the femora and tibiae largely black behind ; hind 

 legs dark, except knees, apex of tibiae and apical joints of tarsi ; wings 

 hyaline, apical margins clouded, nervuresand stigma testaceous. Length 

 8-9 mm. 



Epeolus lectus Cr. 



Epeohts lectus Cresson, Trans. Am. Ent. Soc. vii, 88, $, 1878. 

 Epeolus agnatus Cresson, ibid. 89, <$. 



I have examined the types. The spurs of the 9 are not 

 black. The structure of the abdomen is quite different from 



