290 REVISION OF Tin: ti:xi:i;i;iunii>.k of America. 



0. anastomosis, Say, tsida Jouru. Acad. Ill, 236; Lac. Ologlyptus) loc. cit., pi. 52, fig. 2; Lee, Pactos- 

 toma i loc. cit. 



The figure given by Lacordaire, though inaccurate in many respects, will serve to give 

 the studenl a tolerably exact representation of the species, and with the generic descrip- 

 tion given Leaves nothing to be desired. 



Not abundant. Occurs in Colorado and Kansas. 



Length .50— .60 inch. 



A.STROTUS, Lee. 

 Astrotus, Lee, I lass. Col. N. A., p. 221. 



Abundant!) distinct from any of our Asidini, in the total absence of trochantin to the 

 middle coxae. In this genus there appear many points of structure recalling those Molu- 

 i-I iii allied to Sspidium, wlcre we also find genera with the same structure of middle 

 coxa! cavities, and it is probable that in these genera must be sought the links uniting 

 the now isolated Zopherini with the neighboring tribes. 



A. contortus, Lee, Class. Col. N. A., p. 221; Lee, (Micvoschatia) Proc. Acad. 6, 446. 



Color, dark brown, densely clothed with strongly adherent dark gray scaly coating. 

 Head deeply inserted, lateral sutures between clypeus and front deeply impressed. Thorax 

 broader than long, feebly convex, with two feeble longitudinal ridges separated by a me- 

 dian shallow groove ; apex emarginate, base feebly emarginate ; sides strongly angulate 

 at middle, converging in front of and deeply sinuate behind the angulation, hind angles 

 rectangular and covering (lie humeral angles of the elytra. Elytra oval, broader behind 

 the middle, rather suddenly declivous behind, sides rather strongly rounded and with an 

 acute and strongly serrate marginal ridge extending nearly three-fourths of their Length, 

 disc feebly convex and with an irregular elevated line on each elytron extending from 

 within the humerus to near the apex, and the two thus enclosing an elongate oval space; 

 several short more or les^ oblique ridges extend from the main ridge to the elevated su- 

 tural margin; base of elytra truncate, angles rectangular. 



Length .10-44 inch. 



The entire surface of the body is sparsely clothed with scale-like hairs, and the entire 

 vestiture and sculpture strikingly recall that ol Sepidium. 



All the specimens in our cabinets have been reported from Western Central Texas. 



A . regularis. 



Similar in form and sculpture, differing from contortus in the following points : 

 Sides of thorax not suddenly angulate at middle, but rounded and gradually sinuate to 

 the hind angles. Median discal sulcus very faint. Elytra more broadly oval, marginal 

 ridge moderately acute, not coarsely serrate, median costa moderately elevated, not ser- 

 rate at summit, enclosing a regular elongate oval space. 



