66 MEMOIRS ON THE COLEOPTERA 



fourth longer than wide, less broadly rounded at apex and less than 

 a third wider than the prothorax, the punctures rather close-set 

 and conspicuous; abdominal punctures larger and more numerous 

 than usual. Length (d 71 , 9) 5.8-7.0 mm.; width 3.6-4.7 mm. 



California (coast regions north of San Francisco) gentilis n. sp. 



A Stouter than the preceding, with relatively narrower prothorax 

 and much more inflated hind body, deep black; head and pro- 

 thorax nearly similar, the sides of the latter rather more converging 

 and deflexed apically; antennae ochreous, nearly similar; scutellum 

 more acutely ogival; elytra more oblong, about a fifth longer than 

 wide, the parallel sides but very feebly arcuate though notably 

 more rounding basally to the base of the prothorax than in any 

 other species, very broadly rounded at apex, fully one-half wider 

 than the prothorax, the punctures impressed, separated by rather 

 less than twice their own widths; abdominal punctures finer and 

 sparser as usual. Length (9) 7-5 mm.; width 4.8 mm. Cali- 

 fornia (locality as in the preceding) ventricosa n. subsp. 



4 Stout, oval, moderately shining and piceous-black above, shining 

 and much paler piceo-testaceous beneath; head well developed, 

 largely retracted within the prothorax in the type, the ochreous 

 antennae long, very slender and filiform, nearly as in chrysomclina; 

 prothorax very convex and almost vertically declivous latero- 

 apically, distinctly less than twice as wide as long, the converging 

 sides straight, becoming arcuate only at base, the punctures small 

 but strong, rather more close-set than usual and more noticeably 

 larger toward the sides though not very markedly so; scutellum 

 elongate-ogival; elytra oval, nearly a third longer than wide, widest 

 rather behind the middle, the sides broadly arcuate, very broadly 

 rounded and obtuse at apex, the punctures unusually large, deep and 

 close-set throughout; abdomen finely, sparsely and rather feebly 

 punctate. Length (9 ) 9-2 mm.; width 5.7 mm. Western Nevada. 



nevadensis n. sp. 



The above species are for the most part somewhat "opinionative" 

 perhaps, because of the absence of distinctive structural modifica- 

 tions, this being more marked even than in Byrrhus, for there is no 

 vestiture of any kind to afford diversification, except the dense 

 golden hairs covering parts of the tibiae and the tarsi. I think 

 however that the names assigned above stand for forms that can be 

 recognized, and some of them those proposed as species seem 

 certainly worthy of adoption. Individuals are not rare and we 

 therefore have the benefit of series in coming to a conclusion in 



most cases. 



Tribe LIOONINI. 



There is but a single genus in this tribe, which resembles the 

 preceding in general structure but differs in the very broad and 



