232 AMERICAN COLEOPTERA 



<lc('|); basal impressions distinct; base truncate, obliquely so each side; sides with 

 the margin narrowly reflexed, arcuate in front, oblique behind, sometimes obso- 

 letely sinuate in front of the hind angles, which, though obtuse, are in that case 

 made slightly prominent; hind angles not carinate. Elytra about one-half wider 

 than the thorax, oblong-oval, with a sutural and from one to three dorsal strife, 

 the latter feebly impressed or nearly obsolete; striae impunctate, the sutural 

 deeper posteriorly ; first dorsal puncture about one-third from base, the second 

 about one-fifth from apex. Body beneath piceotis, sometimes tinged with rufous. 

 Legs testaceous. Length .09 .11 inch; 2.25-2.75 mm. 



Only the basal joint of the anterior tarsi is dilated in the males, 

 but the inner angle is prolonged in a spiniform process, which, so 

 far as known to me, is peculiar to this species. This is shown on 

 Plate VI, fig. 16. 



This is one of our most abundant representatives of the genus, and 

 is subject to considerable variation. Some specimens have the head 

 and elytra very finely alutaceous, a silken or faintly iridescent lustre 

 being thus imparted to the latter, but this disappears by degrees in 

 a large series. The color varies as indicated above, as a rule exam- 

 ples from the more western postions of its range being paler than 

 those from the extreme eastern regions, but many exceptions occur. 

 In dark specimens the extreme tip of the elytra is usually very 

 slightly paler. The reverse is sometimes seen in pale examples, the 

 disk in such being often paler than the margins and tip. 



It is very widely distributed, occurring along the Atlantic coast 

 from Massachusetts to Florida and westward to the Rocky Mts., 

 and also in Canada. 



45. T. sequax Lee— Slender, elongate, feebly convex. Head and thorax 

 rufo-piceous, elytra testaceous. Head as wide as the thorax at apex ; eyes moder- 

 ately large and prominent; antennae less than one-half the length of the body, 

 pale fuscous, the basal joints testaceous; palpi testaceous. Prothorax subquad- 

 rate, twice as wide as long, slightly narrower at base than apex ; apex truncate ; 

 anterior transverse impression feeble, the posterior deep, the median line fine, 

 extending between them; basal impressions small; base truncate, obliquely so 

 each side ; sides with the margin narrowly reflexed, arcuate, sinuate in front of 

 the bind angles, which are slightly obcuse, but prominent, not carinate. Elytra 

 elongate, slightly wider than the thorax ; sutural stria deeper behind, impunc- 

 tate, the other dorsal striae nearly obsolete ; dorsal punctures distinct. Body be- 

 neath rufo-piceous. Legs pale testaceous. Length .10 inch; '2.5 mm. 



Dr. LeConte's type is the only example known to me. It is a 

 female, and it is therefore impossible to know its affinities as indica- 

 ted by the tarsal characters of the male. It resembles most closely 

 T. corrusciis, but differs by its more elongate and slightly more con- 

 vex form and by the form of the thorax. 



It was described from the Rocky Mts. 



