Vol. XXXl] ENTOMOLOGICAL NEWS 37 



My first specimens of this species were 2 females and 9 males 

 taken at Dickinson, by Mr. C. H. Waldron, at flowers of 

 Helianthus petiolaris on Aug. 13, 1912. These, together with 

 a female from Valley City, Aug. 13, 1912, at Sideranthus spinu- 

 losus were determined by Mr. Crawford as H. aberrans. La- 

 ter when females were found collecting pollen at Gaura in the 

 evening, I suspected the identity of aberrans and galpinsiae. 

 Cockerell has stated (Proc. Ent. Soc. Wash., v. 9, p. 119) that 

 "the stigma (of galpinsiae) is a lighter, brighter orange than 

 in aberrans." Crawford in his table of species of Halictus 

 (Journ. N. Y. Ent. Soc., v. 15, pp. 183-189), has separated 

 the females on slight difference in puncturation of mesonotum 

 and first segment of the abdomen, the males upon the nature 

 of the hairs of the face ("appressed scale-like" in galpinsiae). 



The North Dakota specimens agree well with Cockerell's 

 description of galpinsiae and I cannot separate the ones taken 

 at other flowers in the daytime from those taken at Gaura in 

 the evening. A paratype female of galpinsiae sent by Prof. 

 Cockerell agrees with the North Dakota specimens. The 

 Dickinson specimens are in rather poor condition, the hairs 

 being more or less matted by moisture. A female taken at 

 Sentinel Butte on Grindelia in mid-afternoon is indistinguish- 

 able from the Gaura specimens. Mr. H. L. Viereck has 

 kindly examined a cotype of aberrans in the U. S. National 

 Museum and finds the scopa as here described. 

 Halictus (Evylaeus) oenotherae new species. 



9. Length 9 to 10 mm., black with sparse, short, pale pubescence, 

 which inclines to yellowish, especially on the legs. Face subquadrate, 

 the front closely and finely punctured, clypeus smooth and shining with 

 sparse shallow punctures; antennae reddish beneath. Mesonotum rather 

 dull, the punctures of moderate size, separated by less than a puncture 

 width laterally and scarcely more than_that medially; propodeum shining, 

 with prominent, somewhat irregular, sharp ridges; laterally these continue 

 over the rounded edge while medially they are interrupted by a ridge; 

 the truncation rugulose and surrounded by a ridge. Posterior legs as in 

 texanus, the hairs of the tibiae somewhat more numerous and a few longer 

 ones on the femur; inner spur of tibiae with four slender teeth; wing ner- 

 vures light brown, the stigma, subcosta and median dark; first recurrent 

 received one-fifth basad of second cubital; second submarginal narrowed 

 only slightly above. Abdomen smooth and shining the first segment very 



