110 Coleopterological Notices, III. 



than long, the apex broadly, rather strongly arcuate, the apical angles broadly 

 rounded, the sides gradually more feebly divergent toward base and becoming 

 nearly parallel in basal third, the angles right, not rounded ; base transverse, 

 the sinuations broad and very feeble ; disk hardly at all impressed, somewhat 

 coarsely, deeply punctate, the punctures round and generally separated by 

 nearly one-half their own diameters, the interspaces shining. Elytra dis- 

 tinctly more than three times as long as the prothorax, and, behind the 

 middle, one-third wider, rather abruptly and obtusely ogival at apex, the 

 sides rather strongly arcuate behind, almost continuous with those of the 

 prothorax, with distinctly impressed series of coarse close-set perforate punc- 

 tures, the intervals polished, nearly flat, finely and sparsely punctate. Abdo- 

 men finely, very sparsely but rather strongly punctate, the prosternum densely 

 so, the propleurse very sparsely. Legs slender, the basal joint of the hind 

 tarsi equal in length to the remainder. Length 5.5 mm. ; width 2.4-2.6 mm. 



Arizona. 



The peculiar form of this species — distinctly widest behind, — 

 together with the long antennae and coarsely perforate elytral striae, 

 will readily serve to distinguish it. It belongs near densus, and 

 has the coarse punctuation of the pronotum characterizing that and 

 some allied species, but the form is here rather less convex ; it is 

 also allied to the Mexican pallidum Champ., but is darker in color, 

 and has the pronotal punctuation less dense and not rugulose. 



Five specimens, which are extremely uniform among themselves 

 in size and outline ; some are entirely pale testaceous from imma- 

 turity. 



30 H. testaceus n. sp. — Elliptical, rather strongly convex, pale rufo- 

 testaceous throughout, strongly shining ; pubescence moderate in length, pale 

 but sparse and not conspicuous. Head rather coarsely, deeply and sparsely 

 punctate ; eyes large, separated by one-half their width in the male and two- 

 thirds in the female ; antennae rather slender and filiform, two-fifths as long 

 as the body, the joints moderately obconical, the intermediate about twice as 

 long as wide, third and fourth equal. Prothorax nearly three-fourths wider 

 than long, the apex narrowly, strongly arcuate and continuous with the sides, 

 which are strongly oblique and feebly arcuate anteriorly, more strongly arcuate 

 in basal two-fifths, becoming very feebly convergent toward the basal angles, 

 the latter right and slightly blunt ; base transverse, the median lobe small, 

 short, rounded ; disk scarcely at all impressed, coarsely, deeply, rather sparsely 

 punctate, the punctures generally separated by nearly their own diameters, 

 the interspaces highly polished. Elytra but slightly more than three times 

 as long as the prothorax, and, at the middle, very slightly wider, gradually, 

 rather acutely ogival in apical two-fifths, the sides parallel and feebly arcuate, 

 the two bases exactly equal ; disk with fine but distinctly impressed series of 

 fine but deep and distinct punctures, which are noticeably linear, the intervals 

 feebly convex, polished, finely but distinctly, sparsely punctate. Abdomen 



