358 MEMOIRS ON THE COLEOPTERA 



as the prothorax, the eyes only moderate; sulci parallel; antennae 

 black, gradually ferruginous from about the middle; prothorax two- 

 fifths wider than long, throughout nearly as in decepta, except that 

 the straight parallel part of the sides behind the constriction is 

 shorter, a ninth or tenth the total length; elytra three-fourths or 

 more longer than wide, relatively less inflated, only about a fourth 

 wider than the prothorax, similar in outline, striation and punctures, 

 the latter likewise gradually obsolete posteriorly; three dorsal punc- 

 tures deep and distinct; scutellar stria obsolete or vestigial; marginal 

 stria submedial in the outer interval. Length (cf 9 ) 14.5-15.0 mm.; 

 width 5.2-5.4 mm. Texas impolita n. sp. 



The scutellum is longitudinally plicatulate as a rule in both these 

 species, and, as usual among the Evarthrids, is very transverse and 

 triangular. 



Evarthrus Lee. 



This genus is composed of a moderate number of species pos- 

 sessing a closely similar habitus, due to the generally opaque integ- 

 uments in both sexes; sometimes this opacity extends to the entire 

 body as in enormis and nonnitens, but usually the anterior parts 

 are less dull than the elytra and in americanus become decidedly 

 lustrous; in the male of blatchleyi the entire body is notably shining 

 though not polished. The sides of the prothorax are oblique to 

 the base, rarely becoming slightly sinuate before the basal angles, 

 and the base is about as wide as the apex, sometimes wider. The 

 last palpal joint is but little shorter than the third, though parallel, 

 with the apex truncate. The antennas are filiform and notably 

 long, often half as long as the body in the male. The inner and 

 outer thoracic foveae are widely separated as a rule, the lateral mar- 

 gin more or less broadly reflexed basally and finely so apically, and 

 not uniformly reflexed throughout the length as in the two pre- 

 ceding genera. The head is usually moderate in size, but some- 

 times becomes much larger as in enormis. The species at present 

 known to me may be described as follows: 



Sides of the prothorax subevenly oblique to the basal angles from behind 



the middle 2 



Sides becoming briefly and feebly sinuate just before the basal angles. 7 

 2 Legs bright red. Body elongate subparallel, only feebly convex, deep 

 black, but little less black beneath; upper surface shining, the elytra 

 opaque in both sexes; head slightly elongate, four-sevenths as wide 

 as the prothorax, the eyes very moderate and but slightly prominent; 

 sulci slightly sinuous; mandibles smooth externally; antennae ob- 



