HlSTERID/E 28l 



the parallel sides becoming obliquely rounded in more than apical third; 

 lateral groove deep, entire, the external surface convex and densely, 

 strongly punctate; disk divided by a coarse deep sinuate groove well 

 before the middle, the punctures on both rather convex lobes fine but 

 deep, rather close-set, becoming coarser at the pronotal base; scutellum 

 minute, equilateral; elytra very nearly as long as wide, about two-fifths 

 longer than the prothorax, broadly inflated basally, rather strongly 

 narrowed and with arcuate sides thence to the apex, a short coarse 

 oblique stria near the humeri alone distinct; surface coarsely, deeply 

 and very closely cribrate; pygidium strongly, closely punctate; pro- 

 sternum between the very large longitudinal grooves divided just behind 

 the middle, the anterior lobe much longer and more convex than the 

 posterior, the latter nearly as wide as long and more depressed than the 

 anterior, both distinctly and rather closely punctate; legs as usual. 

 Length 1.4 mm.; width 0.8 mm. Mexico (Colonia Garcia, Sierra Madre 

 Mts., Chihuahua), C. H. T. Townsend. 



A very distinct species, allied perhaps more especially to con- 

 vergens, which it resembles in the strong dense elytral punctuation; 

 it differs, however, in its more elongate-oblong form, slighter con- 

 vexity, stronger and closer pronotal punctures and somewhat larger 

 size; in both, the elytral suture is strongly elevated by reason of 

 the adjoining depression of the surface throughout the length; 

 this is however a general character, at least to some extent. 



*Plegaderus vegrandis n. sp. Rather narrow and moderately convex, 

 polished, deep black, the legs rufous; head finely, sparsely punctate; 

 prothorax nearly a third wider than long, the parallel sides rounding 

 rapidly at apex, the lateral groove deep, the marginal surface well de- 

 veloped, rather strongly and closely punctate anteriorly, gradually more 

 finely and sparsely toward base; disk divided by a sinuate and moder- 

 ately impressed line near apical two-fifths, both lobes being very mi- 

 nutely, sparsely punctulate; elytra slightly shorter than wide, two-fifths 

 longer than the prothorax, strongly and prominently inflated laterally 

 behind the base, the sides thence rather strongly converging and very 

 feebly arcuate, more rounding at apex; two oblique striae at base are 

 distinct; punctures fine but deep, separated by two or three times their 

 diameters; prosternum with the usual structure, both the anterior and 

 the much smaller posterior lobes elongate. Length 1.5-1.6 mm.; width 

 0.7-0.73 mm. Mexico (Tres Marias, Morelos), Wickham. Two ex- 

 amples. 



Closely allied to consors Horn, from our Rocky Mountain Sonoran 

 fauna, and almost exactly resembling it in general appearance, 

 but the head is much more finely and still more sparsely punctate, 

 and the marginal surface of the pronotum is more unequally puric- 

 tate; the outline is stouter and the two oblique striae at the base 



