Coleopterological Notices. 489 



prothorax. In bachei the sides of the prothorax, in a vertical 



direction, arc narrowly rounded, without trace of marginal bend, 

 while in guadalupensis they are acute and have a fine acute mar- 

 ginal bead throughout the length. Among other differential char- 

 acters of bachei may be mentioned the elytra not distinctly wider 

 than the prothorax and without grooved stria?, having simply rows 

 of tine punctures which extend to the apex, the metasternum much 

 shorter, and the penis acutely produced at apex and not grooved ; 

 in guadalupensis it is broader and narrowly truncate, with a broad 

 dorsal groove ; in these species the penis is sparsely clothed with 

 short robust spines which are reflexed in position, like the teeth of 

 certain reptiles. Both of the species here compared are distin- 

 guished from others by the small widely spaced tubercles of the 

 elytral intervals, w 7 hich are more pronounced in bachei; this char- 

 acter may indicate a community of origin, but at the present time 

 they are certainly abundantly distinct. There are certain characters 

 also which ally the present species to cisteloides, the male intro- 

 mittent organ being truncate in that species and differing very 

 strikingly from the finely acuminate apex as seen in bachei. 



H. callosa n. sp. — Elongate-oval, very convex, feebly shining, castaneous 

 to piceous throughout, sometimes paler beneath. Head fully as long as wide, 

 rather coarsely, extremely densely punctate and dull, the punctures closely 

 crowded throughout ; apex transversely truncate ; eyes a little more promi- 

 nent than the sides before them, very strongly convex, transverse and sur- 

 rounded by the usual very deep groove ; antennae one-half as long as the body, 

 rather robust but not in the least incrassate, joints eight to ten just visibly 

 decreasing in length, the latter one-half longer than wide, eleventh longer. 

 Prothorax one-fifth wider than long, the apex just perceptibly wider than the 

 base, broadly, feebly arcuate, the angles slightly obtuse and narrowly rounded ; 

 base transversely truncate ; basal angles obtuse but not in the least rounded, 

 distinct but not prominent ; sides feebly arcuate anteriorly, slightly conver- 

 gent and more nearly straight thence to the base ; disk usually widest a little 

 before the middle, coarsely, very deeply and extremely densely punctate 

 throughout; sides rather obtuse but with a fine beaded margin which is in- 

 variably present near the base and sometimes traceable throughout the length. 

 Elytra elongate-oval, about three times as long as the pi - othorax and, in the 

 middle, scarcely one-fourth wider ; humeri slightly obtuse, not distinctly 

 rounded but not in the least prominent ; apex rather narrowly rounded ; disk 

 with distinctly impressed striae, which are coarsely, deeply punctate, the 

 punctures approximate, perforate and greatly elongate; intervals moderately 

 convex but very strongly so toward apex, extremely finely, sparsely and 

 irregularly punctate. Abdomen rather coarsely, moderately densely punctate ; 

 metasternum between coxa and groove equal in length to the first ventral 



