OF PHILADELPHIA. 157 



The tubercles whicli are situated upon some of the interstitit'l 

 lines of the elytra, are very minute, and on some specimens 

 nearly ()bs(jk'te. It is an insect of frecjuent occurrence. Mr. F. 

 V. Melsheiuicr named it tlrpnssus, but as it dues not agree with 

 the description of the deprexsus as [267] given by Fabriciuf, 

 Olivier, and llerbst, I have approprinted to it a new designation. 



8. T. TERMINATUS. — Blackish-browii ; terminal joint of the 

 antennae fulvou.'^. 



Inhabits Mi.^souri. 



Body black i.sh-brown, punctured : palpi, antennce at base, and 

 labrum, pieeous; terminal joint of the antennae fulvou.s : thorax 

 subincqual: a longitudinal impressed line; anterior edge con- 

 cave : elytra profuuudly striated, the strite punctured : scutel 

 dark pieeous. 



Length half an inch. 



The inferior part of the body varies in its depth of coloring, but 

 is reddish-brown. The fulvous joint of the antennae, impressed 

 thoracic line, and concave anterior thoracic edge, sufficiently dis- 

 tinguish this species from others of this country. 



[Belongs to /Hfmochia. — Leg.] 



DIAPERIS. r.eoff. Latr. 



1. I). EXCAVATA. — Black: head excavated; and with two 

 horns on the vertex ; antennae rufous. 



Inhabits Arkansa 



Head with two parallel, prominent, cylindrical, pieeous horns. 

 which project forward in a line with the body, and originate be- 

 tween the eyes : front between the horns deeply excavated ; an 

 indentation each side before : antenna; and palpi pale rufous : 

 mandibles black : thorax minutely punctured; [268] lateral edge 

 nearly rectilinear, or but slightly curved : an indentation each 

 Bide of the middle on the posterior margin : elytra with impressed 

 punctured striic : beneath punctured : feet dusky rufous or 

 pieeous. 



Length less than one-fifth of an inch. 



The horns disappear in the female, and are supplied by two 

 short tubercles. This species differs from viridq>cnnu< Fab., in 

 color, in being destitute of the two small horns on the front of 

 the dypeus, and in the direction of the horns of the vertex, whicli 

 1S24.] 



