Vol. XXVl] ENTOMOLOGICAL NEWS I/ 



Descriptions of three new species of the Dipterous 



genus Sciapus with a key to the 



North American species. 



By M. C. VAN DUZEE, Buffalo, New York. 

 In working out the following table of species, I have used 

 Prof. J. M. Aldrich's key, published September, 1904, in the 

 Transactions of the American Entomological Society, as a 



Zj J J 



basis, but uniting under Sciapus the genera Psilopdinus and 

 Agonosoma there used, as is done by most of the European 

 authors now. This key places eighteen species not contained 

 in that of Prof. Aldrich. Four of these were described by Mr. 

 Coquillett, five by Mr. Bigot and nine by myself. Of these 

 last, three are described in this paper, as follows : novebora- 

 censis, banksii, and bradleii; three in the Canadian Entomolo- 

 gist, chalybens, digitatus, and nigrimanus; and three, furcatus, 

 leonardi, and pollinosns, will be more fully described in my 

 report of the Dolichopodidae of Okefenoke Swamp, Georgia. 

 Five species in this key described by Mr. Bigot seem to be 

 recognizable ; at least they seem to be distinct from all other 

 known species from North America, but his carolinensis and 

 pallescens I could not do anything with. Mr. Bigot does not 

 mention any hairs on the face of his occidentalis, painpocciliis 

 and hirtulus, so I take it that they have the face bare, as no 

 doubt they have ; he also states that occidentalis has the arista 

 long, so I place it in the section where the arista is at least two- 

 thirds as long as the body ; the long bristles of the thorax and 

 abdomen would indicate that it belonged there. He states that 

 the femora of hirtulns are reddish with violet reflections ; 

 therefore, I take it that his specimen was somewhat immature 

 and the femora should be blackish with violet or green re- 

 flections, as this is sometimes the case with immature speci- 

 mens with dark femora. For the same reason I have placed 

 his occidentalis in the group with blackish femora ; he describes 

 them as reddish brown. 



Key to the North .-hnericiui Species of 

 I Cilia of the icgulse black or dark brown ....................... 2 



Cilia of the tegulae pale ...................................... 67 



