324 MEMOIRS ON THE COLEOPTERA 



decumbent scales, coarsely, rather closely punctate; clypeus deeply 

 concave, with rather strong separated punctures, constricted basally, 

 the angles acute and very prominent, the apex broadly sinuate from 

 angle to angle; surface densely clothed with pale yellowish scales in 

 apical two-fifths, the remainder sparsely squamose; antenna 1 club 

 very pale, one-half longer than the head, very much curved ; prothorax 

 two and a third times as wide as long, rather strongly angulate at the 

 sides behind the middle, the sides strongly converging and straight 

 thence to the base and converging and feebly arcuate to the apex, 

 broadly and very feebly crenulate basally; basal lobe rounded; surface 

 feebly impressed and densely squamose along the middle and with a 

 short dense vitta near each side; elsewhere the punctures are sparse 

 and rather coarse, each filled by a large broad yellowish scale; erect 

 hairs few in number and anterior and marginal only; scutellum 

 densely squamose along the middle and with scattered scales thence 

 to the sides; elytra fully two-fifths longer than wide, about a fourth 

 wider than the prothorax, longitudinally impressed near the sides, 

 the three fine costules sometimes evident, the sutural angles den- 

 ticulate; scales very sparse, three to four times as long as wide, 

 partially aggregated into feebly defined lines, very dense along the 

 suture; pygidium wider than long, with well separated scales which 

 are about twice as long as wide; abdomen with sparse scales, which 

 are very dense toward the apices of the segments and also with longer 

 erect hairs. Female unknown. Length 26.0-27.0 mm.; width 

 11.5-12.0 mm. Texas (El Paso), Dunn. Three examples. 



squamicauda n. sp. 



A Similar to the preceding in general habitus, coloration, vestiture and 



in the form of the last palpal joint but stouter in outline, the angles 



of the clypeus not quite so prominent or reflexed and its surface 



almost uniformly and rather loosely squamose throughout; 



antennae similar; prothorax similar, except that there are no 



sublateral narrow condensed vittae of scales, the median dense 



vitta similar; scutellum similar; elytra a fourth longer than wide, 



the scales rather more numerous and the aggregated lines rather 



better defined; pygidium about as long as wide, more narrowly 



rounded at apex, the scales rather more numerous but narrower 



than in the preceding, the abdomen similar. Length 25.5 mm.; 



width 12.3 mm. New Mexico. One specimen., .molesta n. subsp. 



Last joint of the maxillary palpi slender, the outer side with a narrow 



shallow groove half as long as the joint, beginning at basal fifth or 



sixth. Body very much smaller in size, pale yellow-brown in color 



and rather shining; head infuscate, somewhat coarsely, not densely 



punctate and with large scales and sparse erect hairs, the clypeus 



pale, moderately concave, subparallel, only just visibly narrowed at 



base, with prominent acute angles and feebly bisinuate apex, the 



punctures still coarser and less close than those of the vertex but 



shallow, the large scales rather sparse, smaller and closer apically; 



prothorax fully twice as wide as the median length, in form, sculpture 



and in the sparse broad scales, dense along the impressed median 



line, and in two interrupted sublateral vittae, nearly as in squami- 



