36 THE CANADIAN ENTOMOLOCxIST. 



1. Elytra with distinct and entire epipleura defined by an acute edge ; 



antennal cavities rounded at tip ; body rather depressed. Type 



Z. Chiliensis, Gray Megazopherus 



Elytra without clearly defined epipleura 2 



2. Antennal cavities posteriorly angulate at apex ; body rather large and 



strongly convex, always pale, with black mottling ; pronotum 



impunctate, [Type Z. Mexicatius, Gray] Zopherus 



Antennal cavities rounded at tip ; body small, strongly convex, the 

 pronotum punctate 3 



3. Elytra not impressed near the suture at apex, each with a large, 



rounded, flattened and abruptly formed tubercle at tip ; body black, 

 sometimes with pale venation or general ground colour, usually only 

 visible at the sides; sculpture very coarse. [Type Z. limbatits, Csy.] 



Zopheriniis 



Elytra impressed at each side of the suture at tip, each with a small 



oblique ridge at apex; body as far as known deep black, without pale 



maculation, the sculpture more or less fine. [Type Z trisiis, Lee] 



Zopherodes 

 The species described by G. H. Horn under the name Zopherus 

 elegans, is very exceptional in having the lateral margins pale and the 

 sculpture fine ; I have not seen it, but would infer that its structural char- 

 acters may differ somewhat from those of either Zopherinus or 

 Zopherodes; it may be attached at present to Zopherodes. The type of 

 Megazopherus (n. gen.) is the largest species of the tribe. Oi Zopherus, I 

 have before me one nondescript form, which may be described as follows: 



Moderately stout, very convex, the prothorax as wide as the elytra, slightly 

 wider than long, constricted at base, dilated and bisinuate at the sides, 

 yellowish-white, v/ith large spots of black, of which two elongate and 

 approximate, from the base to the middle, sometimes confluent, one 

 at each side before the middle, and the usual transverse spot at the 

 apical margin are unusually distinct ; elytra nearly twice as long as 

 wide, with a tolerably regular sutural series of small spots and a 

 marginal series of about five, with other series of small spots much 

 interrupted by very large irregular blotches of black: apex quadri- 

 luberculate ; under surface black, with numerous black-speckled white 

 blotches. Length 18.0-24.0 mm.; width 7.0-9.0 mm. Mexico 

 (Guerrero) 7nar>noratus, n. sp. 



Belongs near reiiculatus, Ch., but less tuberculose beneath, and with 



