630 GoleopteroJogical Notices, VI. 



more than three times as long, about two and one-half times as long as wide, 

 polished, coarsely, deeply punctate nearly as in gratua. Under surface sparsely 

 hairy, the legs moderately stout, the basal joint of the hind tarsi but slightly 

 longer than the last. Length 8.8 mm. ; width 2.4 mm. 



California (Marin Co.). 



The single male before me represents a species allied rather 

 closely to gratus, but diftering in a number of well marked struc- 

 tural characters. The eh'tra are more elonoate and more finely 

 pubescent than in gr^atus, and, although the large deep excava- 

 tion of the fifth segment is nearly similar, the copulatory spicule 

 differs decidedly, being much stouter, with a broad dorsal im- 

 pression extending only sliglitl}' beyond the middle of its length ; 

 in gratus it is more attenuate, with the dorsal channel fine, ex- 

 tending almost to the extreme tip and gradually disappearing. 



MASTOREMl'S n. gen. 



Body subcylindrical. Head rather narrowerthan the prothorax, 

 feebly but abruptly constricted at base, the neck relatively long 

 and thick; tempora convergent and arcuate behind the eyes, long 

 but not at all prominent ; eyes large, deeply emarginate, finely 

 granulated ; antenna? in the male nearly as long as the body, the 

 joints longer than wide, serrate within, graduall}- longer, narrower 

 and less serrate from the sixth, the second joint minute, globular ; 

 maxillary palpi slender, moderate in size, joints equal in thick- 

 ness, slender, obconical, the last cylindrical, ol)tusely pointed and 

 obliquel}' truncate at apex and but slightly longer than the third ; 

 labial palpi minute, apparenth' two-jointed. Epistomal suture 

 STibobsolete. Prothorax constricted at apex, the basal margin 

 fine but defined throughout by an im|jressed line. Scutellum 

 moderate, broadly rounded behind. Elytra coarsely, confusedly 

 punctate, elongate. Abdomen with five free equal segments. 

 Metasternum long. Middle coxte slightly separated. Legs mod- 

 erate in length, rather thick, clothed with long coarse sparse and 

 erect hairs, the tibial spurs short but slender, simple ; hind tarsi 

 slender, filiform, clothed with short stift' blackish hairs, the third 

 joint not wider, triangular, longer than wide, the first contorted 

 at base and slightly longer than the fourth ; claws well developed, 

 thickened within toward base. 



The single species upon which I have been compelled to found 

 a distinct genus, differs markedly in t^'pe from any other known 



