448 CASEY 



width, widest before the middle, the sides feebly but evidently 

 arcuate, becoming straight or subsinuate toward base, the basal 

 and apical angles both rather more than right, the remaining fea- 

 tures almost as in perforatjis^ the punctures, however, even 

 coarser, denser and more coalescent medially, becoming slightly 

 less coarse laterally ; scutellum smaller and more projecting and 

 rounded behind ; elytra one-half longer than wide, very nearly 

 three times as long as the prothorax and one-half wider, with 

 regular and entire series, which are impressed throughout but 

 more strongly toward apex, of very coarse, perforate, less widely 

 spaced punctures ; abdomen very coarsely and deeply but not 

 densely punctate. Length 5.5 mm. ; width 2.42 mm. Lower 

 California (San Jose del Cabo) cribricoUis Horn 



The unique type of cribricoUis was described (Proc. CaL 

 Acad. Sci., V, 1895, p. 251) from Miraflores, but does not seem 

 to differ from the San Jose specimens, one of which was kindly 

 given me by Mr. Chas. Fuchs, except in the apparently more 

 densely punctate head, and in that the very small sparse punc- 

 tures of the elytral intervals are scarcely arranged in double 

 series but evidently more confused. 



Stibia Horn. 

 The only marked difference between this genus and Tri- 

 ■phalus resides in the abruptly deflexed epistomal lobe, but if the 

 mandibles are really without a dorsal tooth, as stated in the 

 original description, it would depart radically, not only from 

 Tripkalus but from every other genus of the tribe, so that I am 

 disposed to regard this statement as due to an error of observa- 

 tion. The general form and sculpture of the body, eyes and 

 superciliary ridge are nearly as in Triphahis. The only species 

 which can enter the genus at present, is one of the largest of the 

 tribe, greatly surpassing Triphahis and equaling the largest 

 known forms of Triorophus ; it may be described as follows : — 



Form elongate, black, the legs ferruginous-brown, shining; head 

 coarsely and confluently punctured ; prothorax moderately con- 

 vex, coarsely and densely punctured, one-half wider than long, 

 the sides broadly rounded, with the margin acute, the angles dis- 

 tinct but not prominent, the apex feebly emarginate, the base 

 feebly lobed ; elytra convex, elongate, oblong-oval, with nine 

 discal series of strong punctures, one marginal series and a short 

 scutellar row of a few punctures ; under surface coarsely and 

 densely punctured. Length 8.0-9.5 mm. Lower California. 



puncticoUis Horn 



