TENEBRIONIDAE. 365 



Antennal cavities obsolete behind, antenna; as in Phloeodes. Noserus. 

 Tarsi not sulcale beneath; ligiila prominent; aiiteiuia; not received in 

 cavities ; 

 Antennte witli eleven liee joints. Phellopsis. 



Zopherus occurs in Texas, New Mexico, and Colorado Deseri, 

 and Phloeodes in California; the latter genus is indicated but not 

 named by Lacordaire. The type of Noserus is the Californian 

 Nosoderma ijlicatam Lee. ; a second species, N. emarginatu^ 

 Horn, occurs in Texas. To Phellopsis belong Bohtophagua ob- 

 cordatus Kirb}-, from Canada and New England, and Nosoderma, 

 porcalum Lee, from Oregon, which are probably races of one 

 species. 



The genus Nosoderma does not occur in our territory; it differs 

 from Phellopsis by the antenna) having the 10th and 11th joints 

 connate into a rounded mass. 



Tribe IX.— USECHIIVI. 



Body oblong, apterous, surface roughly sculptured; front hemi- 

 bexagonal, clypeus truncate, labrinn small, almost entirely con- 

 cealed, mandibles bidcntate at tip; mentum moderate in size, 

 concealing the maxillaj at base and the ligula in part; antennte 

 ten-jointed, the last three joints slightly broader, the antennal 

 cavities at the side margin of thorax, and visible from above; eyes 

 oval, coarsely granulated; anterior and middle coxa3 rather widely 

 separated by the sterna, the middle coxal cavities inclosed by the 

 sterna without trochantin; posterior coxa; small, oval, distant; 

 metastern^im short, side pieces narrow; epipleurifi entire. Legs 

 short, tibia) with minute spurs. Tarsi with silken hairs beneath, 

 not sulcate. 



This tribe contains but one small species, Usechus lacerla 

 Motsch., found in northern California, under bark. The antenna) 

 are described as ten-jointed, as the eleventh is closely united 

 with the tenth, and is represented only by a pubescent space at 

 the tip of the latter. 



Tribe X.— D.4COI>E«I]¥I. 



Body elongate, not convex, apterous; head constricted behind 

 into a narrow neck; eyes coarsely granulated, oval; mentum 

 large, lunate, filling the gular cavity, and covering the base of 



