LIST OF DIPTERA. 203 



thighs clothed with a few short yellow hairs ; four hinder feet dark 

 ferruginous at the base : wings slightly gray, brown at the base and 

 along the fore border, but hardly so beyond the broad brown band ; 

 the latter descends into the disk of the wing, but does not reach the 

 hind border, it is joined to a much paler band that accompanies the 

 longitudinal vein to the base of the wing ; veins black ; poisers dark 

 piceous. Length of the body 3| lines ; of the wings 7 lines. 



a. New York. Presented by the Entomological Club. 



b. New York. Presented by E. Doubleday, Esq. 



Note. This is a variable species, and the insects from which the 

 preceding characters are taken, differ slightly from Macquart's 

 description. 



Chrysops carbonarius, n. s. Niger, capite fulvo, ihorace cinereo 

 quadrivittato, abdomine subtus piceo, pedibus nigris, tarsis pos^ 

 terioribus basipiceis, alls limpidisfusco vittatis etfasciatis. 



Head hoary behind, tawny above, with the two usual piceous 

 tubercles ; the shining piceous part between the mouth and the base 

 1 of the feelers occupies more space in this species than in C. areolatus ; 

 I under-side of the head clothed with long pale yellow hairs : palpi 

 i dark gray ; lancets ferruginous ; sucker piceous : eyes green and 

 | purple : feelers shorter than the chest ; first and second joints taw- 

 ny, with piceous tips, beset with black bristles ; second joint a little 

 ( shorter than the first; third joint black, curved, tawny at the base, 

 tapering from near the base to the tip, longer than the first and 

 second : chest black, clothed with pale tawny hairs, and having 

 \ four very indistinct gray stripes : breast, sides, and abdomen also 

 black, and thinly clothed with yellow hairs ; under-side of abdomen 

 j dark piceous : legs black ; hips and thighs clothed with yellow hairs ; 

 1 first joint, excepting its tip, and the base of the second and of 

 ! the third joints of the four hinder feet tawny : wings brown at the 

 j base and along the fore border, and on the fore half of the breadth 

 l of the wing from the base to near the middle : a narrow and short 

 ! colourless band separates this brown part from a broad band of the 

 same colour, the latter extends to the hind border, but. is paler in 

 I the latter part of its course, it forms the boundary of the brown part 

 \ of the hind border ; veins black ; poisers dark piceous. Length of 



ithe body 3% — 4 lines ; of the wings 7 — 8 lines. 

 Var. |3. The first joint of the feelers and nearly the whole front 

 of the head between the feelers and the mouth are bright tawny : 

 abdomen more thickly clothed with tawny hairs, tawny at the base : 



