38 PSYCHE [April 



size is smaller than that of pilosus, hardly half as large as specimens from Inch, and 

 in some cases the tegument is much less brassy and more bluish as in pruinosus, for 

 which species this variety at first is usually mistaken. It is, however, undoubtedly 

 derived from H. pilosus. 



Female taken on flowers of Prunus, May 28; Crataegus coccinea, June 14; and 

 Solidago, Sept. 6. 



Halictus viridatus Lovell. 



1905 Halictus viridatus Lovell, 9 c?. Can. Ent. 37: 300. 



The female is very common visiting a great variety of flowers ; Salix Bebbiana, 

 May 12; Aralia hispida, July 28; garden rhubarb, June 12; and Leontodon autum- 

 nalis, Aug. 8. The male has the apex of clypeus, labrum, mandibles and tarsi yellow, 

 the tibiae are yellovv' at base and apex with an oblong black spot in the center; taken 

 on Solidago, Aug. 20. 



Halictus oblongus Lovell. 



1905 Hahctus oblongus Lovell, 9 d\ Can. Ent. 37: 40. 



1905 Halictus planatus Lovell, 9, Can. Ent. 37:300. 



Only a single specimen of H. oblongus 9 has been taken, and while it differs from 

 H. planatus in some minor characters, careful comparison shows that it cannot be 

 separated from the latter species. Both sexes of the bee described as H. planatus 

 are common, and the description of the female should be taken as that of tj-^^ical 

 material. Female on Salix Bebbiana, May 12; Aralia trifida. May 21; Rhustyphina, 

 July 10; Aralia hispida, July 27; male on Solidago, Sept. 8. 



d^. — The head and thorax are bluish-green as in the female, but the disc of the 

 metathorax is more coarsely rugose. From H. viridatus it is separated by the entirely 

 black clypeus, labrum, and the black mandibles rufous at tips. The tibiae are wholly 

 black, the tarsi yellow with the apical joints pale brown, the stigma and nervures 

 dark brown, and the antennae browoi-black. 



Halictus versans Lovell. 



1905 Halictus versans Lovell, 9 , (not d'), Can. Ent. 37: 39. 



Female taken on Epilobium angustifolium, July 23-30. It may be distinguished 

 from H. oblongus by the much darker color of the head and thorax, and the numerous 

 fine striae on the disc of the metathorax not extending to the posterior margin, which 

 is slightly gibbous. 



C?. — The male described with this species belongs to H. oblongus. I have, 



