136 A. MATTIIKWS. 



Differs from other species in its small size, oblono; forai. thorax widest 

 before the base,'pieeous antennas, and in sculpture. 

 United States. 



T. brevior Matthews n. sp. — L. c. .75 mm. — Oblong, moderately eonvex, 

 fuscous black, with the elytra paler, clothed with short griseous hair; head large, 

 rather produced iu front : eyes large, rather prominent: thorax moderate, slightly 

 dilated posteriorly, rather longer and wider than the head, widest near the base, 

 covered with small, remote and indistinct tubercles; sides slightly rounded and 

 rather broadly margined, posterior angles acute and much produced ; elytra quad- 

 rate, fuscous, not longer or wider than the head and thorax, faintly asperate in 

 transverse rows; sides almost straight, apex broad and rounded, with the edge 

 white; abdomen castaneous, rather long and obtuse; legs and antennre bright 

 yellow. 



Differs from T. diffinis in its smaller size, shorter elytra, shorter and 

 paler antennae, and fuscous color. 



Guatemala (Champion). 



T. parallelopipeda Matthews Cist. Ent. 2, p. 17o, 1877.— L.c. 1 mm. — 

 Oblono-, convex, rather shining, black, clothed with rather long, yellow hair ; head 

 moderate; eyes not prominent; thorax moderate, very convex, longer and wider 

 than the head, widest at the base, closely and irregularly covered with moderate 

 tubercles; sides slightly rounded, hinder angles much produced and pale; elytra 

 oblong; longer, but not wider than the head and thorax, closely asperate in4rans- 

 verse rows; sides nearly straight, apex broad and rounded, narrowly pale ; abdo- 

 men moderately exserted : legs moderate, bright yellow; autennte rather short, 

 pitchy black. 



Differs from T. Hnrniim its oblong, parallel form, the thorax widest 

 at the base, and short pitchy black antennae. 



British Columbia ( Crotch). 



T. xaiitliooera Matthews Cist. Ent. 2, p. 174, 1877.— L. c. 1 mm.— Oblong, 

 rather broad, convex, pitchy black, with rufescent elytra, clothed with pale hair; 

 head large ; eyes not prominent ; thorax large, convex, dilated posteriorly, longer 

 and much wider than the head, widest at the base, ornamented with minute tu- 

 bercles irregularly arranged; sides rounded and margined with yellow, hinder 

 angles much elongate, flavescent; elytra short, quadrate, not longer or wider than 

 the head and thorax, rather deeply asperate in transverse rows: sides nearly 

 straight, suture rufescent, apex broad, slightly rounded and pale: abdomen mod- 

 erately exserted, obtuse, rufopiceous; legs robust, bright yellow; antenna? long, 

 very bright yellow. 



Differs from T. Hornii in its large size, broad, quadrate form, rufo- 

 piceous elytra, and very bright yellow antenniu. 



British Columbia (Crotch). 



T. Horilii Matthews Trich. Illust. p. 17f), 1872.— L. c. .87—1 mm.— Oblong, 

 very convex, rather shining, black, rather thickly clothed with long brown bail'; 

 head large; eyes prominent; thorax moderate, longer and wider than the head, 

 widest near the middle, closelv and irregularlv covered with small, distinct tulicr- 



