THE CANADIAN ENTOMOLOGIST. 



and these two lines sordid white ; t. a. hne black, double, the inner por- 

 tion sub-obsolete, general course nearly straight, but from the costa to 

 median vein extending slightly inward, and from median to sub-median 

 slightly arcuate outward, as also from sub-median to posterior margin ; 

 median shade prominent, smoky black, straight, extending from costa to 

 posterior margin, in width .04 of an inch, a gray spot in the lower end of 

 it, and bordered externally by the internal portion of the black annulus of 

 the reniform, and below median venules by what seems to be a portion of 

 the t. p. line ; t. p. line obsolete save some black points between white 

 on the veins and the arcuate black portion before spoken of, bending out- 

 ward round the reniform and inward below this ; sub-terminal line whit- 

 ish, irregular, faintly sending gray streaks to the margin on the veins. 

 Stigmata large ; orbicular elongate transversely to the wing, black annu- 

 late with a white shading inside this ; reniform kidney-shaped with the 

 outer depression quite prominent, a prominent black border toward base 

 of wing, but none or only slight on the outside, inside this a white bor- 

 dering that extends round the spot. Outer margin a black line, fringe 

 concolorous with the wing. Hind wings pale smoky gray, nearly uniform, 

 slight indication of a line through the middle, fringe whitish. Thorax 

 gray with the shoulder tufts and posterior scales black tipped. As this 

 covering had been slightly disturbed, could not tell whether these posterior 

 scales formed a low tuft or not, but should think they did. Under side 

 gray, with but faint indication of marks. 



Described from two females from Soda Springs, Sishyon Co., Cali- 

 fornia, one in the cabinet of James Behrens, and the other in the cabinet 

 of G. H. French, captured in September, 1885. 



NORTH AMERICAN TACHINID^. 



GONIA. 



BY PROF. S. W. WILLISTON, NEW HAVEN, CT. 



The genus Gonia is one easily recognized by reason of its peculiar 

 structure of the head and antennae ; unfortunately the separation of species 

 is a much less simple matter. As is so frequently the case, isolated speci- 



