1 62 MEMOIRS ON THE COLEOPTERA 



four-fifths wider than long, widest near the base, the sides rounding, 

 becoming strongly converging and less arcuate thence to the apex, 

 unimpressed; elytra at base as wide as the prothorax," the suture fully 

 a fourth longer; abdomen at base slightly narrower than the elytra, the 

 sides thence feebly converging and straight through the fifth tergite, 

 which is four-fifths as wide as the first and nearly one-half longer than the 

 fourth. Length 2.5 mm.; width 0.68 mm. Connecticut (Westville). 



The female type differs from the female of ochracea in its rather 

 narrower form, smaller head, larger and more anteriorly narrowed 

 prothorax, in the unequal and less transverse two penultimate 

 antennal joints, blacker and much more densely sculptured ab- 

 domen and in other directions; it was sent to me with a number of 

 other species by Dr. W. E. Britton, of the Agricultural Experiment 

 Station at New Haven, Conn., for whom it gives me pleasure to 

 name it. 



Tetrallus Bernh. 



There can be but little or no doubt that this genus is a local 

 modification of the Hoplandriae, confined to the coast regions of 

 California and to the northward, and that the African species placed 

 here by Bernhauer, will be proved by an inspection of their sternal 

 characters, to belong elsewhere in the series. The two following 

 species are different from either fenyesi or densepunctatus, as shown 

 by typical representatives of these species before me, and, of the 

 latter, I have besides the Mill Valley cotype, a good series from 

 Humboldt Co., taken at an unrecorded locality; bicolor Bernh., 

 I do not know: 



Tetrallus trinitatis n. sp. Parallel, convex, rather shining, piceous- 

 black throughout, the legs scarcely paler; punctures fine, rather feeble, 

 moderately close, sparser on the abdomen, where the imbriform sculpture 

 is very feeble but with the characteristic series of asperities along the 

 tergitical apices; pubescence rather long, coarse and distinct, dark 

 cinereous; head large, convex, much wider than long, fully three-fourths 

 as wide as the prothorax, the eyes large, prominent, at two-thirds their 

 length from the base, the tempora much less prominent and arcuato- 

 convergent; antennae rather short, rapidly and somewhat strongly 

 incrassate distally, black, the four basal joints slender and pale, second 

 as long as the first, much longer than the third, fourth strongly obtrape- 

 zoidal and fully as long as wide, five abruptly wider, five to ten subsimilar 

 but rapidly increasing from distinctly transverse to two-thirds wider than 

 long, the last rather longer than the two preceding; prothorax rather less 

 than one-half wider than long, parallel, with subevenly and very moder- 

 ately rounded sides, strongly rounded base and very obtuse blunt angles, 



