336 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.37. 



and on the interspaces; scaly vestiture condensed in transverse 

 fasciae. Under surface of abdomen deeply, moderately, and rather 

 sparcely punctured, with squamiform setae arising from each punc- 

 ture; scaly vestiture dense except in punctures. Metathoracic side- 

 pieces anteriorly prolonged obliquely upward and forward, causing 

 a deep emargination of the elytra and sometimes extending over 

 the elytral margin. 



The markings of this species are very plain, being composed of 

 blotches of black and white. It may readily be separated from the 

 other species by the characters given in the table. 



T^pe.— Cat. No. 12590, U.S.N.M. 



THECESTERNUS HIRSUTUS, new species. 



Described from a series of three specimens in the Hubbard and 

 Schwarz collection, collected by E. A. Schwarz at San Diego, Texas, 

 in April, May, and June. 



Length 4.5-8.5 mm. Black, densely mottled above and below 

 with brown and pale scales, intermixed and bristling ^v^th erect 

 brown and white setae, but with no patches of erect black scales. 



Variable in size, oblong, very much resembling Acalles in form 

 and color. Head convex, closely clad with narrow, elongate, ap- 

 pressed scales radiating from about the middle of the occiput in all 

 directions, mixed with a few white setae; punctuation very shallow 

 and sparse in largest series, very finely, minutely, and closely punc- 

 tulate; front sulcate. Prothorax about as long as wide, widest a little 

 beyond the middle, where it is slightly ^vider than the humeri; 

 broadly rounded on sides, especially toward apex, not suddenly 

 constricted; base straight, slightly angulate at suture of elytra; 

 apex convex; ocular lobes broad, prominent; sides moderately im- 

 pressed behind, anterior transverse impression evident on sides and 

 shghtly so on disk; surface pitted with large, coarse, close pits, par- 

 titions tuberculate; vestiture close, composed of both scales and 

 bristles. Elytra shghtly emarginate at suture; humeri almost rec- 

 tangular, very slightly enlarged ; elytra twice as long as prothorax ; 

 striate as in preceding species, sometimes covered with many small 

 tubercles; scaly vestiture close, mottled brown and light, surface 

 bristling with brown and white setae. Metathoracic sidepieces 

 causing a rounded emargination of the elytra. 



Type.— Ca,t. No. 12591, U.S.N.M. 



THECESTERNUS HUMERALIS Say. 



A series of sixteen specimens from Colorado, Nebraska, Kansas, 

 and Missouri appear to answer to the description of this species. 



The humeral angles are very prominent, although produced in 

 varying degrees, always directed outward and forward, causing a 

 sinuation of the lateral margin of the elytra. The thorax is deeply 



