260 



REVISION OF THE TENEBIUONIDyE OF AMERICA, 



Differs from all other preceding species by its opaque surface, sparsely clothed with 

 pubescence. Our other black and shining species are covered with a white dust or pul- 

 verulcsccncc easily removed by handling. This same dust-like coat may be noticed on 

 many of our smooth Tenebrionidae, and the more especially among those of the higher 

 tribes. 



STIBIA, n. g. 



This genus differs from Triorophus by the following characters : Front trilobed, mid- 

 dle lobe triangular slightly deflexed, lateral lobes broadly rounded. Tarsi pubescent and 

 spinous beneath. Eyes with distinct superciliary ridge, rounded and feebly emarginate. 

 Mandibles without tooth on upper surface. 



The form of the front in the unique species of this genus is entirely different from any- 

 thing seen in the tribe. The lateral lobes are broadly rounded, the middle slightly de- 

 flexed, forming an angle with the rest of the front, the ridge being continous with the 

 sides of the front, so that when the front is viewed from above it appears broadly rounded 

 as in the next tribe, and thus approaches the form seen in foreign genera allied to Tentyria. 



S. puncticollis, black shining, head coarsely and couilnently punctured, thorax moderately convex, coarsely 

 and densely punctured, one-half broader than long. Sides broadly rounded, margin acute; anglos distinct; anteriorly 

 feebly emarginate, posteriorly feebly sinuate. Elytra convex, elongate, oval, with nine rows of strong punctures on 

 the disc, one marginal row and a short scutollar row of 3 or 4 punctures. Beneath coarsely and densely punctured. 

 Legs ferruginous, brown. Length ..12-38 inch. 



Peninsula of California. Collected by Mr. Wm. M. Gabb, to whom I must again ac- 

 knowledge indebtedness for collections, made in all parts of California, kindly placed at 

 my disposal. 



TRIPHALUS, Lee. 



Triphalus, Lee, New Species, 104. 



Triphalus differs abundantly from any of the other genera already noted. The form 

 of front approaches that seen in Trimytis. The middle lobe is rather triangular with the 

 greatest dimension transverse, the sides arc broadly rounded ; the lateral lobes are; very 

 distiuct and separtcd from the median by a well defined incisure. The mandibles are not 

 toothed above. The tarsi are very distinctly pubescent beneath, more so than in any 

 other genera of this tribe, and with the first joint of the hind tarsi rather shorter than the 

 last. 



T. punctatus, Lee, New Species, 104. 



The only species known, is brownish in color, with head and thorax strongly punc- 

 tured. The elytra have rows of large punctures in lines arranged in eight discoidal and 

 one marginal series, with a short scutollar row. 



Lower California. Collected by Mr. Xantus. 



Length .26-33. 



