244 ENTOMOLOGICAL NEWS.' [June, *IO 



black hairs. Second and third segments similar to the first, but with- 

 out black hair of anterior lateral margins and with the black spot on 

 the disc of slightly less width. Fourth segment in both sexes com- 

 pletely covered with yellow to tawney pile. Fifth segment in the male 

 usually covered with yellow to tawney pile. In the female with a 

 triangular spot of yellow pile on the lateral margins, the remainde\ 

 of the segment being black. Sixth segment in both sexes black, with 

 black prostrate hairs and pile. Hypopygium in the male prominent and 

 narrowly connected with abdomen. Wings brownish, darker along 

 the nervures. Front and middle coxae, front, middle and usually hind 

 tibiae and all tarsi with yellow to tawney pile. The light colored pile 

 being confined to the outer surfaces of the tibiae and is mixed with 

 black hair. The pile of the hind legs becomes almost entirely black 

 in the darker colored individuals. There are usually present one or 

 two rather strong, black, presutural bristles which project nearly at 

 right angles with the pleura. When two of these are present, the more 

 caudad is the stronger. The length of the second antennal joint is 

 contained in the third about four times. 



I take pleasure in naming this proposed species in honor of 

 Mr. Alfred B. Champlain, who has added a great deal, in a 

 very short time, to our knowledge of the Diptcra and Colcop- 

 tcra of this immediate region. 



Five specimens, Carlisle Junction, Pa., collected by the au- 

 thor; one specimen, Colemansville, Pa., P. H. Hertzog; one 

 specimen, Lyme, Conn., A. B. Champain. Type male and fe- 

 male deposited in the U. S. National Museum, Washington, 

 D. C. 



The species described above resembles most nearly Dasyllis 

 grossa Fabr, but differs in the following details : 



Third joint of antenna somewhat shorter. There are ap- 

 parently no presutural bristles of the character mentioned 

 above in D. grossa. First abdominal segment in D. grossa 

 separated from the second by a deep incision, is somewhat 

 swollen at the sides and almost if not entirely black, "in D. 

 champlainii this is not the case. The proboscis sheath in 

 D. grossa is terminated abruptly and incrassated or clubbed ; 

 in D. champlainii it is much less so. 



There exists also a very distinct difference in the structure 

 of the hypopygium and color markings of the abdomen, both 

 of which are shown on the accompanying plate. 



