NORTH AMERICAN COLEOPTERA. ll'T 



Thorax widest near tlie middle Ilornil. 



Thorax widest at the base nicrilii. 



Thorax not wider than the elytra, hinder angles of the thorax not acute. 



niccreiiN. 



Species added to tlie foregoing by Mr. Champion's more recent dis- 

 coveries in Central America : 



T. Alliberti, distinguished by its broad head and thorax, attenuated elvtra, 



and erect setae on the thorax and elytra. 

 T. luci«la, distinguished by its shining, translucent surface and largely dilated 



thorax. 

 T. glauca, distinguished by its small size and dense glaucous pubescence. 

 T. aiiglistipeniiis, distinguished by its broiid thorax and narrow oblong 



elytra. 

 T. e.vcelsa, distinguished from T. abrupta \>y its shining surface and remote 



sculpture. 

 T. graiidicollis, distinguished by its usually wneous color and erect setse on 



the thora.x and elytra. 

 T. vitrea, distinguished from all by its translucent and very shining surface, 



short rounded form, and small size. 

 T. Allbcei. distinguished by its elongate shape and rufo-brunneous color. 



T. Scliaiimii Matthews Ann. Mag. Nat. Hist. 17, p. 143, 1886.— L. c. 1 mm. 

 — Elongate, very much attenuated posteriorly, very convex, and very shining, 

 rufo-eastaneous, very sparingly clothed with short griseous hair; head moderate 

 rather long; eyes moderate slightly prominent; thorax rather short, and very 

 broad, very convex, smooth and shining, rather longer, and mu(!li broader than 

 the head, widest near the base; sides broadly margined, and very much rounded, 

 basal margin arcuate, with the angles broad, acute and excessively produced, ex- 

 tending about one-quarter of the length of the elytra ; elytra short, very convex, 

 and very much attenuated, shorter and much narrower than the head and thorax, 

 widest at the shouldeis, translucent, faintly and remotely asperate; sides slightly 

 rounded and margined, apex nearly straight, abdomen much attenuated and elon- 

 gate, with five segments exposed; legs long, bright yellow, antennfe long and 

 slender, bright yellow. 



This remarkable species differs from all others in its broad head and 

 tliorax, exceedingly long hinder angles of the latter, small, narrow and 

 translucent elytra, elongate and attenuated abdomen, and shining, casta- 

 iieous color. 



A single example found in Louisiana (Dr. Schaum). 



T. Ilaldeiiiaiiiii (LeConte) Motschulsky Bull. Mosc. 41 p. 177, 1868.— L. c. 

 1 —.12 mm.— Rather elongate, very convex and shining; head and thorax black, 

 rufo-castaneous, very sparingly clothed with short, pale hair; head very large and 

 very broad ; eyes small, not prominent ; thorax large, wide and very convex, de- 

 pressed at the base, much longer and broader than th^ head, widest before the 

 base, ornamented with small, rather remote tubercles, regularly and elegantly ar- 

 ranged in nearly straight transverse rows; sides very much rounded and moder- 

 ately marsjineil, hinder angles broail. acute and much produced; elytra attenuated 



