A NEW PARASITIC FLY OF THE GENUS 

 CHAETOPHLEPSIS 



By R. T. Webber 



Of the Bureau of Enioonology, United States Department of Affriculture 



The new species described in this paper was recognized in the 

 course of parasite work at the gypsy moth laboratory of the Bureau 

 of Entomology. The writer wishes to acknowledge the technical 

 assistance which he received from Dr. J. M. Aldrich, of the United 

 States National Museum, during the preparation of this description 

 and the notes which accompany it. 



According to Aldrich/ the genus Hypochaeta Brauer and Bergen- 

 stamm does not occur in the United States and the species assigned 

 to that genus by Coquillett ^ and Smith ^ should be referred to Ghae- 

 tophJepsis Townsend.* In assigning Smith's species to Gh<ietophlep- 

 sis, Aldrich recognized but one of them, tow7isendi, as valid ; the 

 other, eudryae, he made a synonym of C. tarsalis Townsend. A study 

 of more material from the gypsy moth laboratory, Melrose High- 

 lands, Mass., confirms Aldrich's synonymy in part. It appears that 

 the type material of Hypochaeta eudrya^e Smith is a mixture of two 

 species. The holotype (from Eudryae grata^ Newton, Mass.) and 

 one paratype (White Mountains, H. K. Morrison) are identical with 

 C. tarsalis^ while the remaining paratypes (Oswego, N. Y., 1897) 

 represent a new species. 



The males of this new species are readily differentiated from the 

 others of the genus by their well-developed orbital bristles, wider 

 front, and shorter pulvilli. The females are more difficult, but the 

 wider front, shorter antennae, and distinctive reddish-yellow base of 

 the third antennal joint will serve to separate them from tarsalis. 

 The female of townsendi is unknown. 



No. 2863.— Proceedings U. S. National Museum, Vol. 78. Art. 20 



23912—31 1 



