NORTH AMERICAN CdLKOl'TKIi A. I."*.") 



iiioderutc; tliorax moderate, longer and wider tlian the liead, widest at the base, 

 ornamented with small tubercles, closely but irregularly arrnnged, hinder angles 

 Miiich produced, acute and pale at the point; elytra narrow, slightly attenuated 

 posteriorly, not longer or wider than the head and thorax, very closely asperate 

 in transverse rows; sides slightly rounded, apex much rounded, pale, with the 

 edge white : abdomen rather long, obtuse ; legs robust, with the femora dusky, ami 

 tlic tibiie bright yellow ; antennre slender dusky yellow. 



Differs from T. fascicnlaris in its narrower form, smaller head and 

 tliorax, and dusky antennae. 

 British Columbia (Crotch). 



T. fascicnlaris Herbst Nat. Syst. o, p. 8, 179.",.— L.c. 1 — 1.25 mm.— Sub- 

 oval, convex, IJack, not shining, sparingly clothed with short pale liairs; head 

 moderate; eyes rather prominent; thorax moderate, longer and wider than the 

 head, dilated posteriorly, widest at the base, ornamented with small, distinct tu- 

 bercles in transverse wavy rows; sides slightly rounded, hinder angles produced 

 and acute; elytra moderate, attenuated towards the apex, longer but rather nar- 

 rower than the head and thorax, asperate in close, transverse rows; sides slightly 

 rounded, apex rounded and pale; abdomen considerably exserted, obtuse : legs and 

 antenna^ moderate, briglit yellow. 



Differs from others in its larger size, sub-oval form, smaller head, rather 

 liinsi; and attenuated elytra, and in .sculpture. 

 Uitited States. 



T. Josephi Matthews Trich. Illust. p.«i;]2, 1872. — L.c. .75 mm. — Oblong, 

 rather narrow, moderately convex, black, thickly covered with short pale hair; 

 head rather long; eyes rather prominent; thorax rather large, longer and broader 

 than the head, widest at the base, very thickly covered with rather large tubercles; 

 sides slightly rounded, posterior margin reflexed aiid j'ellow, hinder angles acute 

 and produced : elytra rather long, oblong, with the sides nearly parallel, not wider, 

 but nearly half as long again as the head and thorax, moderately asperate in close, 

 but distinct, transverse rows, apex strongly rounded and flavescent; abdomen 

 moderately exserted, obtuse; legs rather long, i-obiist, bright yellow: antenna' 

 slender, i-ather short, pitchy black. 



Differs from T. atrnta, Motsch.. in its smaller size, parallel and iiiirmw 

 elytra, and in sculpture. 



Vancouver's Island (H. and J. Matthews). 



T. difliiiis Matthews Trich. Illust. p. i:!2, 1872.— L. c. .75— .87 mm.— Oblong, 

 rather broad, convex, black, rather thickly clothed with Havescent hair; head 

 large, rather short and broad; eyes small, not prominent; thorax rather large, 

 dilated posteriorly, widest before the base, longer and broader than the head, or- 

 namented with small tubercles irregularly arranged ; sides margined and rounded, 

 hinder angles considerably produced, acute and pale; elytra rather sliort, quad- 

 rate, rather narrower and scarcely longer than the head and thorax, moderately 

 asperate in transverse rows; sides margined and straight, apex broad, slightly 

 I'ounded ; pale, with the edge white ; abdomen moderately e.xserted, obtu.«e ; legs 

 robust, bright yellow; antcniiiH moderale, piceous. 



