23& ENTOMOLOGICAL NEWS. [June, '07 



Notes on some little known North American 



Syrphidae. 



By Paul R. Jones, Lincoln, Nebraska. 



1. Chrysogaster nigrovittata Loew. 



Two females, one from Craig's Mountain, and one from 

 Moscow, Idaho. The antennae are a trifle longer than I would 

 infer from Loew's description, the epistoma rather prominent, 

 upper part of the face with delicate transverse striae, front 

 rugose on the sides with a middle longitudinal space. Thorax 

 finely punctate, deep green, with four coppery longitudinal 

 stripes. Legs wholly black. Formerly recorded from Wash- 

 ington, California and Colorado. 



2. Chrysogaster stigmata Williston. 



Three specimens ; two from Craig's Mountain, and one from 

 Moscow, Idaho. 



3. Pipiza albipilosa Williston. 



A female from Moscow, Idaho, and a male from Vollmer, 

 Idaho, May 30, 1896. Compared with a female from Penn- 

 sylvania, the pile on the female is longer and a trifle lighter 

 than in the eastern specimen; third joint of the antennae wider, 

 answering to Williston's description minutely; abdomen is 

 wider, clothed with shorter pile, than in the one from Pennsylva- 

 nia; also, with the posterior part of the second and third seg- 

 ments with dark-appearing cross bands of black pile. Legs 

 black, tibiae and tarsi not so light as in the eastern specimen, 

 being more brownish. Wings not so distinctly brownish, and 

 the outer anterior angle of the posterior cell a trifle more obtuse. 



The male not so distinctly white pilose as the female. Front 

 and vertex appearing black pilose, in some lights, and white in 

 others; face with similarly colored pile. Third joint of the 

 antennae more like that in the eastern female and lighter than 

 that of the western specimen. Thorax, with pile similar to that 

 of females ; abdomen similar to that of western female and with 

 similarly colored pile. Legs black, similar to those of western 

 female. Wings more brownish, similar to those of specimen 

 from Pennsylvania, outer anterior angle of the first posterior 



