ENTOMOLOGICAL NEWS 



AND 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION 



ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



VOL. XXI. 



JUNE, 1910. 



No. 6. 



CONTENTS: 



Walton A new species of Dasyllis from 



Pennsylvania 243 



Davis Aphis aquaticus Jackson versus 



Rhopalosiphum nymphaeae Linn. 245 

 Alexander Fulton Co. (New York), 



Tipulidae I 247 



Watson On a new species of Sat urn i- 



dae 255 



Dvar and Knab The genus Mansonia 259 

 Webster Notes on three species of 



Jassidae 265 



Felt West Indian Cecidornyiidae 268 



Cockerell New and little-known west- 

 ern Bees 270 



Newcomer The Butterflies of the Lake 



Tahoe Region 274 



Fditorial 278 



Notes and News 279 



Entomological Literature 280 



Reviews 286 



Doings of Societies 287 



Obituary Lancaster Thomas 290 



A New Species of Dasyllis from Pennsylvania. 

 W. R. WALTON, Harrisburg-, Pa. 



(Plate IX) 



While collecting at Carlisle Junction, Pa., at the base of 

 the South Mountain on June 22, 1909, the writer collected 

 two Asilids which then seemed to be Dasyllis grossa Fabr. 



When examined at leisure, however, important differences 

 became apparent and Mr. E. Daecke, to whom they were 

 shown, declared that in his opinion it was a new species. 



On the following- July ist, an attempt was made to secure 

 additional specimens, which resulted in the acquisition of three 

 more individuals, two of which were males. 



Upon comparing these specimens with the species already 

 in the literature I, too, am convinced that it is new to science. 



Dasyllis champlainii sp. nov. 



Length 19 to 24 mm. Moustache and beard pale yellow (lemon- 

 yellow) to tawney (pale brown ochre). Bristles of the mystax dis- 

 tinct and black. Dorsum of thorax covered with prostrate, rather short, 

 pale yellow to tawnry. pile. Pile and bristles of the mesopleura black 

 or at most with a very slight sprinkling of yellowish hair near the 

 upper edge. Scutellum black, shining, thinly covered with small, black, 

 prostrate bristles. Abdomen ; first segment black, somewhat shining, 

 with a triangular spot of yellow to tawney pile on the lateral hind mar- 

 gins enclosing a black, somewhat anvil shaped spot, which is shining 

 and thinly covered with black hair. Anterior lateral margins bearing 



243 



