DESCRIPTIONS OP NEW SPECIES. 239 



Lateral stripe of prothorax and elytra and three oblique bands of scarlet 

 pubescence ; process of ungues of front feet small, of middle feet 

 larger ; . Varies ( $ ) with the bands narrower, more oblique and" 

 sometimes obsolete. 9. TRIDENTATA Fabr. 



Lateral stripe of prothorax and elytra, and sutural Hue of scarlet pubes- 

 cence ; process of $ uugues broad and short. 10. LATERALIS Fabr. 



II. Claws simple in both sexes ; 



Lateral and sutural margin of elytra, prothorax, and head clothed with 

 bright yellow pubescence, head with two, prothorax with six black 

 spots ; trigeminata Randall. 11. PUNCTICOLLIS Say. 



Black, coarsely punctured, thinly clothed with fine cinereous pubescence ; 

 . Pubescence fulvous, punctures rather coarser ; (Gal. Oregon.) 



12. MOESTA Lee. 



Black, densely clothed with cinereous pubescence, less coarsely punctured. 



13. CONCOLOR Lee. 



MECAS LEC. 



569. M margiuella. Atra subtiliter pubescens, et breviter villosa, 

 prothoracis lateribus et vitta dorsali, elytrorum margine lateral! apicali 

 et suturali pube pallide flava dense vestitis. Long. 7 8 mm. 



Western States and Texas. Easily distinguished by the above 

 characters ; the thoracic vittae do not extend upon the head ; 

 the elytra are coarsely punctured, and rounded at tip ; the inner 

 division of the claws is acute, and a little shorter than the outer 

 one, though more nearly equal than in M. femoralis. 



STYLOXUS LEC. 



Eyes coarsely granulated, very large, scarcely separated on the 

 vertex, deeply emarginate, but not divided, upper lobe moderately 

 wide ; front deeply channelled, antennae about twice as long as 

 the body, slender, 11-jointed, scape shorter than the head, sud- 

 denly constricted at base, with the basal angle rectangular promi- 

 nent, and the apical edge armed at the inner side with a short 

 spine, there is also on the lower side a large well defined apical 

 cicatrix ; 2d joint distinct,'but with condyle projecting, larger than 

 the joint itself; following joints nearly equal, sparsely ciliate be- 

 neath, llth shorter. Palpi very unequal, maxillary with the last 

 joint oval pointed, labial very small ; mandibles short, stout, 

 pointed. Prothorax cylindrical, one-half longer than wide, 

 slightly and obtusely dilated at the middle. Elytra three-fourths 



