THE CANADIAN ENTOMOLOGIST. 23 



NOTES ON CHRYSOTIMUS WITH THE DESCRIPTION OF 

 A NEW SPECIES (DIPTERA). 



BY M. C. VAN DUZEE, BUFFALO, N. Y. 



I took two of these little flies in Northern Ontario, one at 



Kearney and the other at Brule Lake on the first and second of 



August, 1911. They are both males, and are no doubt the male o£ 



hoew' s Chrysotimus delicatus, agreeing with his description in having 



the antennae black, palpi yellow, and the posterior cross-vein 

 before the middle of the wing., 



It seems to me that the males described by Prof. Wheeler 

 (Psyche Vol. V, p. 375) as the male of C. piisio Loew should have 

 been considered a distinct species, as both males and females that 

 he took in Wisconsin had the first two antennal joints -yellow, the 

 third brown. as is the case in C. concinnus Zett,an European species, 

 but it is not likely that it is that species, as in concinnus the cross- 

 vein is before the middle of the fifth vein, while in Wheeler's 

 specimens it is at or beyond the middle, if it answers Loew's de- 

 scription of pusio as he states,. I have not seen Wheeler's material 

 and therefore cannot be sure that his specimens represent a new 

 species. 



The males of this genus haVe the abdomen metallic green, 

 while that of the female is mostly yellow. The hypopygium is 

 conspicuous but scarcely bent under the abdomen; in all three 

 species that I have seen it has a small, hairy, black appendage 

 near the centre of the posterior edge 



The males of delicatus Loew that I took in Canada have the 

 abdomen and thorax bright metallic green with coppery reflections 

 and thin grayish pollen; the hypopygium brown, conspicuous but 

 imbedded, forming a rounded tip to the abdomen, which projects 

 in a point slightly below the venter. 



I took one male and three females at Colden, Erie Co , N. Y., 

 Aug. 9th, 1914, which are no doubt the true C. pusio Loew. They 

 have black antennae and brown palpi ; the cross-vein is in ,the middle 

 of the fifth \'ein as in the male of delicatus Loew, but appears a 



January, 1916 



