172 J. L. LECONTE, M. D. 



2. — Black; elytra rather coar.sely punctured; head with a coarsely punctured 



lateral groove 3. obsidiaiius. 



Black; antennse legs and elytra pale; elytra coarsely punctured; head 



with finely punctured lateral groove 4. temporalis n. sp. 



Black; elytra piceous, more finely punctured ; head with coarsely punctured 



and feebler lateral groove 5. picipeiini!^ n. sp. 



Black; antennse legs and elytra ferruginous, the last piceous at base; head 



without lateral groove 6. dianidiatus n. sp. 



3. — Larger and stouter, head piceous 7. emniesus. 



a. Smaller and more slender; head piceous, elytra and abdomen darker 

 than prothorax; fu.sciceps Fauvel. 



4. — Piceous-black, prothorax not paler 5- 



Brown- testaceous, head darker T. 



5. — Head beneath coarsely and deeply punctured 6. 



Head beneath feebly jjunctured; above very sparsely and coarsely punc- 

 tured at the sides 8. giilaris n. sp. 



6. — Elytra piceous, legs testaceous 9. obscurus. 



Elytra bright red, legs rufo-testaceous 10. saiiguiuipeiiuis u. sp. 



Smaller; elytra yellow, legs pale-testaceous 11. pui^illus. 



7. — Gular sutures deep, as in all the preceding species 12. iiainatu!^. 



Gular sutures very fine 13. nanus n. sp. 



The European X. punctulatus Payk., is said by Fauvel. Faun. Gallo- 

 Rhenane, iii, 386. to occur in North America, but I have seen no 

 specimen of it. 



1. X. ceplialllS Say, is found also in California. 



2. X. Tulgidiis Fabr., has been introduced from Europe. 



4. X. temporalis. — More slender than X. obsidianus, piceous, antennae, 

 legs, sides and tip of elytra piceo-testaceous; elytra sparsely coarsely punc- 

 tured, punctures arranged in nearly regular rows. Head moderately convex, 

 smooth, sparsely and coarsely punctured at the sides, inner frontal grooves 

 long and deep; under surface very sparsely punctured; sides with a broad 

 shallow longitudinal groove, distinctly margined and marked with a few 

 shallow punctures. Prothorax with dorsal series 4 — 5 punctured, lateral series 

 punctured, with a large |)uncture nearer the margin as usual. Dorsal segments 

 sparsely punctulate in fi-ont, nearly smooth behind. Length 4.7 mm. 



Cedar Keys, Florida, Mr. Hubbard. Differs from X. obsidianus by 

 smaller size, more slender form, by the lateral grooves of the head 

 less punctured, and by the large punctures of the upper surface of 

 the head being fewer, and not mixed with small punctures. 



5. X. picipeunis. — Of the same form and size as X. obsidianus, piceous, 

 black; antennse dark brown, legs ferruginous; elytra piceous, paler at the mar- 

 gins, more finely not densely punctured. Head moderately convex, scarcely 

 one-half longer than wide, hind angles much rounded, above very coarsely 

 punctured, with a large median space smooth ; the inner pair of frontal grooves 

 deep and long, the outer ones not visible; under surface very sparsely coarsely 

 punctured, with a lateral band of confused punctures, and distinct marginal 

 edge. Prothorax as long as the head, oblong, with rounded angles, dorsal 



