NORTH OF MEXICO. 



269 



the name of E. rugosus, from the hand of Motschulsky. While rejecting the typical 

 species to the doubtful list, the genus must be retained, an illustration of the prediction of 

 a genus by an author who at the same time commits a specific blunder in doing it. 

 Our species thus far known, arc as follows : 

 Winged species — metasternum long. t e x a n u s . 



1 o n g u lus. 



Apterous species — metasternum short. 



Larger species ; fuscous or ferruginous. 



Small species; black, with paler legs. 



Margin of thorax sub-parallel behind middle; angles 



rectangular. 

 Margin of thorax sinuate near hind angle, angle acute. 

 " rounded and gradually narrowing to 

 apex. 

 Margin of thorax rounded, wider at middle, angles 

 obtuse. 



punctatus. 



s u b o p a c u s . 

 p i n g u i s . 



a t e r . 

 acutus. 



o b e s u s . 



obtusus, 



E. texiinus, Leo., N. Spec;. 872, p. 108. Texas. Length ,80 ineli. 



E. Ion g ul us, Lee., Ann. Lye. 5, 188. (Eurymetopon) Southern Cal. and Arizona. 



This species differs from the preceding in having the base of the thorax much less dis- 

 tinctly sinuate, angles more obtuse. The surface of thorax at middle is very sparsely 

 and at the sides continently punctured, while in t e x a n u s the surface is densely and very 

 evenly punctured. 



E. punctatus, Lee., N. Spee. 868, p. 108. Lower California. 



Recalls the form of Eurymetopon rufipos. Length .30-.37. 



E. su bop ;ieus. Elongate oval, subopaque, moderately oonvex, head densely and ooarsery punctured; thorax 

 coarsely and moderately densely punctured, punctures more dense at the sides; wider than long, narrowed in front, 

 anteriorly emarginate, posteriorly truncate, sides feebly rounding from the base, angles obtuse. Elytra distinctly 

 punctured in striie, interstices Hat, subopaque and smooth. Beneath paler, prothorax and pectus densely and coarsely 

 punctured, abdomen not coarsely and moderately punctured. Length .85 inch. 



Found at Fort Grant, Arizona,, under stones. Third much more convex than punctatus 

 and more elongate and less obese than pinguis. 



M. pi nguis. Leo., N. Spec., p. 107. Lower Cal. 



A very robust Coniontis-like form. 

 Length .30 inch. 



E. atcr, Lee, Ann. Lye. 5, liSO. (Eurymetopon.) California. 



Black, with brownish or ferruginous legs, regularly oval and convex. Thorax with 

 the sides parallel behind the middle and with the angles rectangular. Length .20 inch. 



AMERT. PHILOSO. SOC VOL. XIV. (18 



