THE CANADIAN ENTOMOLOGIST 55 



Hind tibiae simple, not noticeably widened at the ends, and 

 without a circle of bristles at the tip...' 3 



3. Arista entirely black, third joint of the antenna? small, 



brown scutellatiis Macq. 



Arista with the thickened basal portion yellow, antennae entirely 

 bright yellow 4 



4. Abdomen with two distinct bands in both sexes; upper half of 



front of female linear daeckei Johns. 



Abdomen indistinctly banded in the male, in the female the 

 lateral margins are yellow, upper half of the front of the 

 female not linear.. slossoncB sp. n. 



Nephrocerus daeckei Johnson. 



N. daeckei Johns., F.nt. News, Vol. XIV, p. 107, 1903. 



In this species the sexes are so similar that one of the co-types 

 before me was inadvertently referred to as a male, probably be- 

 cause the front is so narrow. For about one-half its length it is 

 a mere line. The sides of the first and the posterior margins of the 

 second and third abdominal segments are widely margined with 

 yellow. The wings are proportionately broader and not of equal 

 width as in the following species. 



In addition to the types from Richmond Hill, Long. Island, 

 N. Y., July 2, 1901, I have examined two males from Plummer's 

 Island, Md., June 29, 1913 (R. E. Shannon), and one female, 

 Franconia, N. H. (Mrs. Slosson) in the U. S. National Museum. 



Nephrocerus slossonae, sp. n. 



Nephrocerus, n. sp. Ent. News, Vol. VIII, p. 237, 1897. 



Male. — Face and front covered with silvery white tomentum, 

 vertical triangle and occiput black, grayish pruinose, occipital 

 orbits deeply emarginate, mouth parts and antenna^ light yellow, 

 arista black, the thickened base light yellow. Thorax, discal 

 portion black, shining, the anterior third covered with a grayish 

 bloom, humeri, broad lateral stripes, and the scutellum, yellow, 

 the latter much darker than the humeri, pleura livid, a lighter 



