TENEBRIONID/E 203 



short sparse spinules beneath, as in the preceding genus. The 

 assumed type of the genus may be described as follows: 



Body rather stout, moderately inflated posteriorly, convex, shining, 

 glabrous, deep black throughout; head and prothorax alutaceous, 

 the former feebly impressed transversely, rather coarsely but 

 sparsely punctate throughout, the antennae (cf ) as long as the pro- 

 thorax or shorter (9), rufo-piceous apically, with the rather long 

 but sparse bristling seta? dark fulvous; prothorax one-half wider 

 than long, the apex distinctly narrower than the base, deeply, 

 circularly sinuate, with the angles acute and not blunt at apex, the 

 sides rather strongly rounded medially, thence moderately con- 

 verging and straighter anteriorly and less converging and broadly, 

 feebly sinuate basally, the base transverse, posteriorly and obliquely 

 sinuate at the sides, the angles acute and obliquely, moderately 

 prominent; surface broadly, rather feebly convex, very finely and 

 remotely punctulate, rather abruptly but not very widely though 

 strongly reflexed at the sides, the sparse punctures there only a little 

 stronger but with the surface transversely rugose toward the edge, 

 which is rather thin and subeven; scutellum broadly triangular; 

 elytra three-fifths longer than wide, widest slightly behind the 

 middle, two-fifths (cf) to nearly three-fifths (9) wider than the 

 prothorax, at base very slightly wider than the thoracic base, the 

 sides arcuate, rapidly rounding in behind, the apical lobe large and 

 distinct, obtusely rounded; surface strongly convex, even, shining, 

 with rather coarse and remotely scattered punctures, the side margins 

 somewhat angulate in section and distinct but not carinate to 

 apical fourth, becoming cariniform and reflexed only at the humeri; 

 under surface with rather coarse, sparse punctures throughout, 

 becoming closer on the last segments of the abdomen; legs a little 

 longer and stouter in the male than in the female. Length (cf , 9 ) 

 21.0-22.0 mm.; width 10.8-11.9 mm. Texas (El Paso). [Asida 

 obliterata Champ.] obliterata Champ. 



The original description given by Mr. Champion extends to 

 only two or three lines and was founded upon specimens taken at 

 Paso del Norte, Mexico, just across the Rio Grande from El Paso; 

 so I infer that the form described above, taken by Mr. Dunn, is 

 the true obliterata. Besides this species, those described in the 

 "Biologia" under the names Asida rufipes, moricoides, fceda, tarda 

 and latissima by Mr. Champion, will also form part of the genus 

 Megasida. 



Stethasida n. gen. 



This genus differs from any of the preceding, except the Micro- 

 schatia section and Astrotus, in having the prosternum between the 

 coxae prominent at tip and not deflexed to the apical margin of the 



