62 MEMOIRS ON THE COLEOPTERA 



finer, oblique, the intervals feebly convex, the punctures of 3-5-7 

 only two to three in number and still more apical, the lateral foveae 

 and scattered punctures stronger; tarsi nearly similar but a little 

 shorter. Length ( 9 ) 9-O mm.; width 3.7 mm. Utah (Virgin River). 



corpulentus n. sp. 



Form more parallel, probably by reason of sexuality to some extent, the 

 anterior parts much larger when compared with the elytra than in 

 the types of the three preceding, somewhat piceous black above, the 

 under surface piceo-ferruginous, the legs paler and more yellow, 

 the antennae and mouth parts as usual; head nearly three-fourths 

 as wide as the prothorax, the punctulation similar but still finer, 

 sparser and nearly obsolete, the antennae about attaining the thora- 

 cic base; prothorax barely two-fifths wider than long, nearly similar 

 in general form but with the transversely rectilinear base just 

 visibly sinuate opposite each fovea and with the obtuse angles nar- 

 rowly rounded; surface with a few longitudinal wrinkles anteriorly 

 and medio-basally, the foveae short, very deep, punctulate, broaden- 

 ing basally; all other punctures wanting; side margins very fine; 

 elytra oval, rather strongly alutaceous, broadly rounding at the 

 sides, the humeri very broadly rounded, the sinus obsolete, scarcely 

 at all traceable, fully one-half longer than wide, not quite a fourth 

 wider than the prothorax, the striae fine, slightly impressed suturad; 

 intervals flat, the punctures of 3-5-7 three or four in number and 

 extending some distance from the apex as in pitncticeps, the marginal 

 punctures and foveae small and sparse; hind tarsi with the first four 

 joints decreasing uniformly and rather rapidly in length, the anterior 

 much shorter than the others but slender, nude beneath. Length 

 (cf) 9.0 mm.; width 3.4 mm. Arizona (near Benson), Dunn. 



regressus n. sp. 



Either the figure of obliquus given by Horn is erroneous as is 

 probably true or that species differs distinctly from any at hand 

 also in the punctuation of the head, for, as drawn, the punctures 

 are mainly limited to a triangular median part, instead of being 

 evenly diffused throughout as in all the others. It is also probable 

 that the author neglected to observe the punctures near the apices 

 of intervals 3-5-7 on the elytra, which, without much doubt, are 

 present in his type of obliquus. These punctures indicate some 

 affinity with Piosoma alternata, as is also the case with Cratognathus 

 cordatus Lee., of the Harpalini, referred below to a separate genus. 

 These punctures also reappear in many Anisodactylids, forming 

 thus another case of parallelism of development or reversion. 



Tribe HARPALINI. 



This tribe is the largest of the subfamily and probably the most 

 difficult, so far as the delimitation of genera is concerned. It was 



