74 COLEOPTEllA OF NORTH AMERICA. 



over the gula. Ligula broad, corneous, filling the emargi- 

 nation of the raentum, and projecting beyond it; einarginate 

 in front, without paraglossce; labial palpi 3-jointed, joints 

 diminishing in thickness. 



Maxillde large and strongly made, with two large, flat, 

 thinly ciliated lobes; palpi 4-jointed, last joint iivsiibrn^ 

 narrower, but scarcely shorter than the third. 



Antennae 9- (perhaps 10-) jointed, first joint long, cylin- 

 drical ; second wider, half as long as the first, cup-shaped, 

 fringed with long hairs; the remaining joints form an oval 

 club, with transverse articulations fringed with long hairs. 

 The antennte are inserted under the edge of the side margin 

 of the head, not far from the hind angles, and are not much 

 longer than the head, when retracted they are received in 

 deep marginal grooves on the dorsal surface of the prothorax. 



Mandibles very small, form not yet exacth^ determined 

 on account of want of material. 



Head with front and sides forming nearly a semicircle, 

 occiput with carved outline slightly prominent, fringed with 

 stout depressed spines forming a kind of comb, outside of 

 which the hind angles are fringed with long hairs; between 

 the occiput and the front margin of the prothorax is a deep 

 oblique groove forming an obtuse angle at the middle; 

 labrum very short, transverse, visible chiefly from beneath. 



Eyes wanting. 



Prothorax trapezoidal, slightly convex, acutely emargi- 

 nate in front, side margin of notum deeply grooved nearly 

 to the base, where the groove bends inwards and becomes 

 a sinuous line of large punctures; the anterior part of this 

 groove is used as a receptacle for the antennae; base obliquely 

 sinuate each side, broadly emarginate in front of the scutel- 

 lum; hind angles rounded, fringed with long hairs. Pro- 

 sternuui very large, fiat, subtriangular, concealing the in- 

 sertion of the coxffi, produced behind into a large, broad 

 proces-s, rounded at tip, and fringed with long hairs; this 

 process extends over the front part of the mesosternum ; 

 side pieces apparently separated from the pronotuni by 

 suture; coxal cavities open behind. 



Mesothorax short, scutel large and triangular; mesoster- 

 num obtusely elevated in front, where it is covered by the 

 prosternum, produced behind into a similar broad obtusely 

 rounded process, fringed with long hairs, and projecting in 

 like manner over the front part of the metasternum ; side 

 pieces large transverse, finely aciculate, not distinctly divided 

 into episterna and epimera. 



