342 THE CANADIAN ENTOMOLOGIST. 



The interrupted elytral costae equal, not forming elevated crests ; 

 elytral fascia pale yellow or white albic'mdus^ Lee. 



5. Prothorax with small median callus rete?iius^ Say. 



Prothorax carinate or not 6. 



6. Prothorax more or less distinctly carinate 7. 



Prothorax not carinate 11. 



7. Ventral segments coarsely and closely punctate 8. 



Second, third and fourth ventral segments finely 



and sparsely punctured u^nis, Boh. 



8. Uj^per surface with short erect setae; femora with two acute spiniform 



teeth compositus, Casey. 



Upper surface without erect sette 9. 



Q. Thorax distinctly carinate from tip nearly to base ; hind femora 



with a large acute tooth and a small denticle seiiiculus^ Lee. 



Thoracic carina feebls ; hind femora with two small denticles .. 10. 



10. All the ventral segments closely and rather coarsely punctate, last 



ventral without tubercles : elegafis, Say. 



First and second ventral segments very coarsely, not densely, punc- 

 tured ; fifth finely and more densely punctate, with two distinct 

 tubercles ♦. aratus^ Germ. 



11. Thorax coarsely punctate, punctures not closely placed, but well 



separated, and never confluent ; elytral costae almost obsolete on 



the disk, but visible at apex Jiivosus, Lee. 



Thorax coarsely and densely punctate, punctures more or less 

 confluent near apex 12. 



12. Front femora with a moderate tooth and a small denticle, coloured 



like leucophcp.atus, but the thoracic white lines indistinct, and the 



elytra with pale, semi-erect setae Arizoniciis^ n. sp. 



Front femora with two rather prominent teeth, of which the one 

 nearest the apex is slightly smaller than the inner ; dark-coloured, 

 elytra with a more or less distinct post-median yellowish band and 

 short recumbent black set^e , ecarinatus, n. sp. 



Cofiotrachelus Texanus, new species. — In form and colour resembling 

 a small fisswigtiis, but thorax and elytra with short bristles. Head 

 clothed with white scale-like hairs ; beak scarcely as long as head and 

 thorax, feebly curved, trisulcate on each side, apex sparsely punctate on 

 the disk, at sides with a few larger punctures. Thorax shining, slightly 



