AMERICAN COLEOPTERA. 137 



scutellar black spot anJ the sides, apex, and base usually margiued 

 with black. 



HET^RIUS, Erichs. 

 H. californicus, n. sp. — Broadly ovate, convex, reddish-brown, shining. 

 Front concave, margin elevated, rather coarsely punctured and hairy. Thorax 

 with a deep oblique sulcus on each side, margin thick, very convex, and with 

 a deep impression at middle. Elytra seriately setulose, and with two discal 

 stripe, of which the outer only is entire, an entire sub-humeral, extending from 

 base to apex. Pygidium convex, smooth, inferior. Propygidium smooth, con- 

 vex, vertical. Prosternum comjjressed between the eoxse, broader behind, 

 emarginate at apex, lobed at base. Mesosternum with middle lobe rounded, 

 prominent, lateral lobe prolonged, acute, and with deep fossa on each side. 

 Body beneath paler, smooth, shining. Length .09 inch; 2.25 mm. 



The disc of the thorax between the grooves is moderately convex, 

 rather coarsely punctured and hairy, the margin is very convex and 

 with a very deep impression at the middle, in front of which the sur- 

 face is coarsely punctured and hairy, and behind smoother. The 

 obli((ue sulcus is deeper and broader at base. The sides of thorax are 

 gradually rounded from base to apex. The prosternal lobe is quite pro- 

 minent and slightly emarginate at apex. The prosternum between the 

 coxaj has on each side a finely elevated line. 



Thisspecies resembles brunnipcnuia, Lee, and maybe known by the 

 sides of the thorax being rounded, not oblique, the impression at middle 

 of margin deeper, the disc punctured and hairy, the elytra broader, and 

 the strite deeper. In its general form this species is broader and more 

 convex. 



For a single specimen of this species, I acknowledge great indebted- 

 ness to Mr. James IJehrens, of San Francisco, who has already contri- 

 buted several uniques of scientific interest to my cabinet. 



One specimen from Sonoma, California. Occurs probably with ants 

 as do our other species of Jhtxriux. 



TRIBALUS, Erichs. 

 T. californicus, n. sp. — Oblong oval, moderately convex, slightly shining. 

 Ilead coarsely but sparsely punctured, front near eyes elevated. Antennae 

 frontal, piceo ferruginous, club annulated, truncate and testaceous; an- 

 tennal fossa at anterior angle of thorax concealed from beneath by a well 

 developed pectoral plate. Thorax twice as broad at base as long, moderately 

 convex, sides gradually rounded from base to apex, lateral margin distinctly 

 reflexed, surface rather coarsely and moderately densely punctured. Elytra 

 more shining than thorax, moderately convex, and with four slightly elevated 

 costse of which the outer three are entire, the inner one half the length of ely- 

 tra, also a marginal ridge becoming inferior at its posterior half, attaining the 

 apex but fainter at tip, and a sub-marginal fainter ridge of half the length of 

 the elytra; intervals between costse irregularly sub-biseriately punctured ; 

 disc of elytra with series of moderately coarse punctures. Mesosternum arcuate 



