Vol. xxix] ENTOMOLOGICAL NEWS. 9 1 



Some Genera of Bees (Hym.) 

 BY CHARLES ROBERTSON, Carlinville, Illinois. 



In my paper, "Synopsis of Halictinae," Can. Ent., 34:243-50, 

 1902, species with pubescent fasciae on the apical margins 01 

 the abdominal segments and with the cubital nervures not en- 

 feebled or obsolescent were referred to Halictus, while those 

 with the fasciae on the basal margins and the third cubital 

 nervure enfeebled were referred to Lasioglossum. It is pro- 

 posed to subdivide these groups. 



//. parallelns Say (H . occidentalis Cress.) and H. leron.vii 

 Lep. are retained in Halictus. 



Odontalictus n. gen., with O. Vujatns (H. ligatus Say 

 H. armaliceps Cress.) as the type, is separated on account of 

 the cheeks of the female being produced into a tooth. 



Seladonia n. gen., with S. sdadonia (H. scladonins F.) as 

 the type, includes rather small, greenish species, like .S\ fas- 

 data, flavipes, etc. 



Curtisapis n. gen., with C. coriacca (H. coriaccns Sm.) as 

 the type, is separated on account of the serrate hind spurs of 

 the females. The females are more opaque and smaller than 

 in Lasioglossum. It includes also C. fiiscipcnnis and forbcsii. 



Neotrypetes n. gen., with Trypcies prodnctus as type, has 

 the second ventral segment of the male chitinous on the sides 

 and membranous in the middle. The first segment is larger, is 

 produced over the second and is clasped by the apical dorsal 

 segment. In the type of Trypctes, T. truncorum. the first seg- 

 ment is not produced. The second is larger and the apex of 

 the last dorsal segment is pressed against it. In Trypctes male 

 the principal ventral segment is the second, while in Neotry- 

 petes male the first is the principal one. 



Zaperdita n. gen., with Pcrdita niaitra as type, has the max- 

 illary palps consolidated. It might properly be referred to 

 Geoperdita, but that genus is said to have only three joints to 

 the labial palps. 



Heterosarus n. gen., with Calliopsis pan'its as type, differ.-i 

 from Pscudopanurgus in having the tibial scopa of simple 

 hairs.- Pseudopanurgus has a plumose scopa and collects pol- 



