Coleopterological Notices^ VI. 669 



strongly, somewhat densely punctate, the anterior lobe very large, strongly 

 transverse, oval, widest at about the middle, the basal lobe rather short, 

 nearly cylindrical, the constriction not extending at all upon the disk. Elytra 

 long, about twice as long as wide, not more than two-thirds wider than the 

 prothorax, just visibly dilated at tlie middle, the sides thence feeldy oblique 

 to the apex, which is moderately widely subtruncate; om opiates very feeble; 

 punctures strong and dense toward base, becoming grad^lally very fine and 

 moderately distant toward apex; pubescence short, somewhat abruptly cine- 

 reous and more distinct in basal third. Abdomen moderately shining, the 

 legs rather short and thick. Length 2.5 mm. ; width 0.75 mm. 



Arizona. 



The unique male has the fifth ventral broadly truncate toward 

 the middle, the genital segment deepl}^ sinuato-truncate, the tibiaj 

 not distinctly modified. This species is very distinct, and, to- 

 gether with bipartitus and iurgidicoUis, is somewhat aberrant in 

 the outline and constriction of the prothorax. 



19. I., gibbitltorax Pic— MLscel. Ent., ^Starch, 1894, p. 21 ( Anthicus). 



Moderately elongate, shining, reddish-testaceous, with the ab- 

 domen and posterior two-thirds of the elytra blackish, the head 

 dark, arcuately rounded behind, with the punctuation sparse; 

 eyes gra}- ; last joint of the palpi enlarged; antennae slender, 

 rather long, almost filiform, sometimes darker toward apex. Pro- 

 thorax relativel}^ short, somewhat dilated, rounded anteriorly, 

 having near the base a gibbous elevation which is very distinct 

 in profile; base transversely grooved. Elytra scarcely narrowed 

 at base, the humeri somewhat angulate, distinctly attenuate be- 

 hind, the apex truncate, somewhat dilated at the middle, with the 

 punctuation very fine, having some pale hairs wdiich are short, 

 sparse and semi-erect. Under surface shining. Legs slender, 

 moderately short, the posterior tibia? slender, the femora scarcely 

 thickened. Length .3.0 mm. 



Texas. I have not seen the type of gibbithorax, but Mr. Pic 

 has kindly sent me a specimen of the closely allied backianus 

 Chmp., from Mexico. The erect hairs mentioned in the descrip- 

 tion are very short and only distinct toward apex, as usual in 

 this genus. This species differs from backianus and tumidicollis 

 in its coloration and rather stouter form. The above description 

 is translated from the original. 



