374 A Preliminary Monograph of the 



Lake Superior ^ 1. 



A rather robust species, easily to be identified by its large 

 prothorax, pale colors, and very dense punctuation; it is very 

 distinct in all its characters. 



53 T. convcxului Lee— Trans. Am. Ent. Soc, VE., p. 244. 



The original type greatly resembles scrupulus, but differs in 

 its much longer and wider prothorax; the surface is shining and 

 polished. It is the only known representative. 



54 T. clebilis n. sp. — Rather slender and convex, black; legs pi- 

 ceous, knees, tips of the tibiae and tarsi flavescent; antennae, mandibles 

 and palpi piceous; pubescence short, fine and dense, rather conspic- 

 uous, cinereous; integuments feebly shining. Head slightly narrower 

 than the prothorax, as long as wide, moderately convex, very finely 

 and extremely densely punctate; prominences narrow and strong; eyes 

 large, prominent, coarsely faceted; antennae rather slender, distinctly 

 longer than the head and prothorax, extremely feebly incrassate; sec- 

 ond joint subcylindrical, slightly more than twice as long as wide, third 

 obconical, as wide at apex as the second and three-fourths as long, 

 fourth very slightly shorter than the third and more robust than the 

 second, distinctly longer than wide, tenth very slightly wider than 

 long. Prothorax scarcely one-fourth wider than long, widest just be- 

 fore the middle, where the sides are obtusely rounded, thence very fee- 

 bly convergent and distinctly, evenly arcuate to the apex, more strongly 

 convergent and feebly sinuate to the base, which is broadly arcuate, 

 four-fifths as wide as the disk and very slightly narrower than the apex; 

 the latter transversely subtruncate; apical angles slightly obtuse and 

 narrowly rounded, basal more obtuse and broadly rounded ; disk broadly 

 convex, very obsoletely, longitudinally bi-impressed, the impressions 

 subinterrupted, without trace of median impunctate line, finely and 

 very densely punctate. Elytra fully as long as wide, nearly one-half 

 wider and longer than the prothorax, feebly impressed near the suture, 

 T^ery minutely and densely punctate; punctures equal to those of the 

 pronotum but about twice as distant. Abdomen very distinctly nar- 

 rower than the elytra, parallel; sides nearly straight; border rather 

 strong and shallow; surface finely reticulate, minutely and densely 

 punctate. Legs slender. Length 2.5 mm. 



^ I am not absolutely sure that the locality here given is correct. See 

 remarks under description of Lathrobium inops (Cont. Col. N. A., II., 

 p. 136). 



The same remark applies to the locality here assigned to fallax. 



