420 CASEY 



but the sculpture of the abdomen is sufficiently diversified to 

 afford recognizable specific characters, and this, with modifica- 

 tions in the form of theprothoracic apex and angles, general form 

 of the body and sculpture of the upper surface, will probably 

 lead to their identification with some careful stud}^ I find that 

 it conduces greatly to accuracy in identification, to have clean 

 and well prepared specimens, mounted carefully, so that the 

 axial plane of the bod}'^ shall be horizontal. Mctopoloba is, in 

 all probability, confined to the northern parts of the Sonoran 

 faunal province, not extending far into Mexico. 



Pechalius n. gen. 

 In its short and broadly oval form, marked pubescence and 

 complete absence of supra-orbital carinee, this genus would seem 

 to be somewhat transitional between the genera that precede and 

 Efitragodes and Schoenicus^ which follow, but this appearance 

 is in great part superficial, for in the produced presternum, 

 deeply received within an abrupt and profound mesosternal ex- 

 cavation and in the basally broadened form of the prothorax, it 

 is undoubtedly a normal member of the Lobometopon group. 

 The eyes are flattened and finely faceted, the mandibles 

 squarely truncate at tip, with the apical smooth part abruptly 

 delimited from the punctate basal part by a feebly impressed 

 transverse line, the right with the usual dorsal tooth clasping the 

 labrum. The upper line of the epipleuree does not quite attain 

 the sutural angles, ending at a very short distance therefrom in 

 a feeble and scarcely noticeable thickening, the surface thence 

 sloping rapidly to the angles. The tarsi show that the genus is 

 really isolated and not related, as might be conjectured from 

 the form of the elytral apices and the conspicuous vestiture, to 

 the subgenus Epitragoma of Lobotnctopon, for here there is no 

 trace of fine pubescence forming pads or otherwise distributed 

 on any of the tarsi, all of which have the lower surface covered 

 sparsely with short coarse spines. The type and only known 

 species may be described as follows : — 



Body broadly oval, very convex, black, polished, with a somewhat 

 bright bronze lustre, the vestiture decumbent, rather long, con- 

 sisting of arcuate whitish, somewhat matted hairs, forming obscure 

 vittse on the elytra ; head rather coarsely and closely but unevenly 



