Last joint of palpi oval ; third and fourth antennal joints together not longer 



than the fifth Ulochaetes leoninus. 



Last joint of palpi bell shaped ; tliird and fourth antennal joints together 



distinctly longer than fifth Necydalis. 



Elytra obliquely impressed only N. mellltUS. 



Elytra obliquely impressed and also transversely near tip. 



Antennae more slender, fourth joint longer N. laevicollis. 



Antennas stouter, fourth joint shorter N. cavipenilis. 



The fourth antennal joint in cavipennis %, is scarcely more than half as long- 

 as the third. In the 9 it is not so conspicuously short, but still much 

 shorter than in Icrvicollis. 



U. leoninus Lee, Proc Ac. Phil, vii, p. 82 ; Ent. Rept. 1S57, p. 62, t. 2, f 12. 

 Length 25 mm. =^ i.oo inches. Habitat. — Oregon, Nevada. 



The short elytra and great size will quickly distinguish this re- 

 markable species. It is very robust and hairy, and seems to be rare 

 in collections. 



N. mellitus Say, Bost. Journ. i, 1835, p. 194; amcrkana 9 Hald., Trans. Am. 

 Phil. X, p. 44 ; Proc. Ac. Phil, iv, p. 372. 

 Length 15 — 21 mm. = .60 — 84 inches. Hab.—XwA., Pa. 



Color variable, usually rufotestaceous, head, antennae (base and 

 tip tinged with rufous), thorax, scutellum and abdomen above black; 

 elytra punctate, more coarsely towards the margin ; reddish brown 

 with paler spot at tip, or entirely rufotestaceous. The oblique im- 

 pression is not deep, and does not reach the tip. 



N. laevicollis Lee, Ann. Nat. Hist, iv, 1869, p. 383. 

 Length 16 mm. = .64 inches. Hah. — Nevada, Vane. 



Color variable, rufous or piceous. The form is more robust 

 than the preceding, and the elytra are roughly punctured with a 

 strongly marked impression near the suture and slightly oblique. 

 Near the tip is a sharply defined transverse impression, behind 

 which the tip is obliquely elevated. 



N. cavipennis Lee, S. M. C. No. 264, p. 204. 



Length 18 — 22 mm. = .72 — .88 mm. Hab. — Cala. 



Color is variable as in the preceding, which it strongly resem- 

 bles. It is, however, stouter, and besides the differences in antennce 

 stated in above table, the elytra are impressed nearer the tip, which 

 is more suddenly concave. 



ENCYCLOPINI. 



This tribe contains three genera, each represented by a single 

 species. The generic characters briefly are : 



