124 ENTOMOLOGICAL NEWS. [Mar., '17 



joint; fore metatarsi three-fourths as long as their tibiae and longer 

 than the remaining four joints together; middle metatarsi about four- 

 fifths as long as their tibiae and one and one-fourth times as long as the 

 remaining four joints. 



Knob of the halteres yellow, stem brown ; tegulae white with black tips 

 and long white cilia. Wings nearly hyaline; costa rather thick and 

 black from the tip of the first vein ; veins yellowish at the root of the 

 wing. 



Described from two males taken at Eastham, Massachu- 

 setts, June 27th, by C. W. Johnson. Type in the collection of 

 the Boston Society of Natural History. 



Mesorhaga nigripes Aid. 



Two females and four males that seem to belong to this 

 species are in the Cornell University material sent me for 

 study. They come from Blue Lake. Humboldt County, Cali- 

 fornia, and were taken by J. C. Bradley. 



Prof. Aldrich described this species from females. I give 

 the characters of the male below. The females differ from his 

 description only in having .all the tibiae and tarsi uniformly 

 brown, and there is a small black bristle at the upper corner of 

 the eye not mentioned by him. 



$ . Hypopygium rather long, shining black, with a few long hairs on 

 the outer or dorsal surface; appendages becoming more yellowish 

 towards the apex, rather thick and tipped with two stout, black bristles. 

 Femora ciliate below with long white hairs, these hairs as long as the 

 thickness of the femora; in the female these hairs are much shorter, 

 less than one-half the thickness of the femora. Third antennal joint 

 rounded at tip, about as long as wide, second joint with a very long 

 stout bristle below; in the female the antennae are formed about as in 

 the male and of nearly the same size, but the bristles of the second 

 joint are much smaller. The fore and middle metatarsi of both sexes 

 are nearly as long as the four remaining joints. 



Table of Males of the North American Species of Campsicnemus. 



1 Middle tibiae not or but little incrassated 2 



Middle tibiae incrassated at least at base 4 



2 Middle tibiae yellow, not flattened degener \\"h. 



Middle tibiae mostly or wholly black and somewhat flattened.... 3 



3 Femora mostly yellow arcuatus sp. nov. 



Femora mostly black nigripes sp. nov. 



