April, igi7 Bulletin of the Brooklyn Entomological Society 43 



thorax, scarcely wider at base than prothorax a Httle above hind angles, 

 gradually widening towards a little beyond middle, thence arcuately nar- 

 rowing to apex, apices subtruncate ; striae scarcely impressed and with 

 moderate, close, somewhat elongate punctures ; intervals rather sparsely 

 punctate and more or less transversely rugose. Prosternum shining, 

 coarsely and closely punctate, side pieces rather dull and more densely 

 punctate, with smaller punctures than at middle. Metasternum and abdo- 

 men not densely punctate with moderate punctures ; coxal plates rather 

 suddenly dilated inwards with the exterior angle rounded. Tarsi simple. 

 Length 7 mm. Tulare Co., CaHfornia. 



This species, a single male, was in the material received by the 

 late Ottomar Dietz from the above named locality and I am under 

 the impression that I have seen other specimens of this species 

 showing variation in the coloration of elytra, being either entirely 

 piceous or with the dark sutural stripe narrower and the sides 

 paler than in the type specimen. 



B. bigeminatus Rand, our only other species differs from the 

 above described species, besides coloration, in having distinctly 

 and rather sharply carinated hind angles and shorter antennal 

 joints. Both species, bigeminatus and calif ornicus are not typical 

 BetarmrOn. The third tarsal joint in the type species of the genus, 

 the European B. ferrugineus, has the fourth tarsal joint very 

 small, and the third dilated and with a small lobe, while in our 

 species the tarsi are simple. In Genera Insectorum, Coleoptera, 

 family Elateridse. ■ Otto Schwarz failed to list our Betarmon 

 bigeminatus. 



Oxygonus montanus n. sp. Form elongate, head and prothorax black, 

 elytra blackish brown, first joint of antennae and legs reddish. Head mod- 

 erately coarsely and not densely ptmctate. Antennae nearly as long as the 

 head and prothorax, joint two shorter than third, fourth a little shorter 

 than third and slightly longer than wide at apex, joints four to ten, about 

 as long as wide and feebly serrate, joint eleven elongate oval and a little 

 longer than the tenth. Prothorax about as long as wide, feebly narrowing 

 towards apex, sides scarcely arcuate, hind angles acutely prolonged, mod- 

 erately divergent and not carinate ; surface with moderate and well sepa- 

 rated punctures, which are a little coarser toward apex and finer near 

 base ; pubescence grayish white and longer than on elytra. Elytra as wide 

 at base as the thorax ; sides feebly arcuate and nearly parallel, narrowed 

 and conjointly rounded near apex; surface with moderately impressed 

 and not coarsely punctured striae ; intervals rather flat and not densely but 

 confusedly punctate, covered rather sparsely with short grayish white 

 hairs. Metasternum and abdomen rather finely, not densely punctate and 



