226 TERTIARY INSECTS OP NORTH AMERICA. 



TAPHACRIS gen. iiov. (edTrru), dup/?). 



This peculiar genus appeai-s to fall in the Eremobida; or near this 

 group of Q^dipodichr, the intercalary vein of the tegmina being absent, but 

 it does not agree with any of the known genera of that tribe. The head 

 is large and well rounded, smooth ; the vertex of moderate width, the eyes 

 large, not prominent ; antennae cylindrical, uniform, slender, not reaching 

 the extremity of the short pronotum. Pronotum stout, rather short, very 

 slightly and regularly exjianding from in front backward, the lobes of equal 

 length, the anterior divided in the middle by a second transverse incision, 

 the very slight median carina not extending to its anteinor half, which is 

 produced and angulate ; tip of pronotum obtusely angulate. Tegmina 

 longer than abdomen, the costal area broad at base but not convex ; the 

 simple subexternomedian arises in the middle of the wing and the exter- 

 nomedian vein has five branches beyond it, with simple cross-veins in the 

 interspaces and no reticulation ; there is no intercalary vein ; the interno- 

 median vein terminates just before the origin of the subexternomedian in a 

 large, triangular cell (surrounded by irregular reticulation), from the lower 

 angle of which springs a broad fork, the inner branch of which terminates 

 at the end of the short anal vein far within the middle of the wing. The 

 wings are as long as the tegmina, the preanal portions repeating closely, 

 especially in the branches of the externomedian vein, the characteristics of 

 the tegmina. 



Taphackis reliquata. 



PI. 12, Figs. 8, ly. 



The vertex is a little less than half the width of one of the eyes, as seen 

 from above. Antennae composed of about thirty-two joints, each about 

 twice as long as broad, the whole reaching close to the tip of the pronotum. 

 Pronotum slightly longer than its greatest breadth. Tegmina slender and 

 nearly equal, the scapular vein closely approaching the costal margin at 

 about three-fifths the distance from the base, the mediastinal terminating at 

 about two-fifths the distance, the area above it forming a regular triangle 

 broad at base and gradually narrowing, filled with oblique, but toward the 

 base rather irregular, veins. Tlie tegmina appear to have been more or less 

 obscurely testaceous, and jjerhaps more or less blotched, but tiie veins are 



