COLEOPTERA OF BAJA CALIFORNIA. 239 



two-thirds, the latter the entire length of elytra. Abdo- 

 men longer than the elytra, sparsely punctate, with short 

 golden hairs. Prothorax beneath with few very coarse 

 punctures at middle, polished at the sides, abdomen 

 sparsely punctate gradually more closely to apex. 

 Length, .17 inch; 4.5 mm. PI, xx, fig. 10. 



Male. Last ventral with a deep oval emargination, the 

 face of the segment slightly flattened. 



The genus Asemobius proposed above is allied to Za- 

 lobius, but differs in having the gular sutures separated 

 and by the terminal joint of the maxillary palpus scarcely 

 longer than the preceding joint. The occiput may be 

 retracted under the apical margin of the thorax, but in 

 Zalobius the occiput is elevated above the neck, so that 

 it applies against the edge of the thorax. 



One specimen. California without special locality, 

 but I think given me by Mr. L. E. Ricksecker. 



TOMARUS BISIGNATUS n. Sp. 



Pale fusco- testaceous, each elytron with a small pice- 

 ous spot centrally placed, form of -piilchellus but somewhat 

 more acute behind, surface with moderately coarse pu- 

 bescence. Head moderately coarsely, not closely punc- 

 tate. Thorax twice as wide as long, slightly narrower at 

 apex, sides moderately arcuate, disc convex more coarsely 

 and less densely punctate than the head, basal fovese well 

 marked. Elytra punctate, the punctures somewhat larger 

 and more distant than those of the thorax, very much finer 

 and nearly obliterated at apex. Body beneath darker 

 than above, sparsely finely punctulate. Legs pale. 

 Length, .06 inch; 1.5 mm. 



Camp Grant, Arizona; San Jose del Cabo. 



The species of Tomarus are not numerous and may be 

 distinguished in the following manner: 



