Coleopterological Notices. 489 



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

 direction, are narrowly rounded, without trace of marginal bead, 

 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 wdder 

 than the prothorax and without grooved striae, having simpl}^ rows 

 of fine 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 narrow^ly 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, which 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 thi'oughout, sometimes paler beneath. Head fully as long as wide, 

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

 crowded throughout ; ai)ex 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. 

 Piothorax one-fifth wider than long, tlie 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 tlie 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. 

 Eljitra elongate-oval, about three times as long as the prothorax 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 strije, 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 



