364 A Preliminary Monograph of the 



what subconfluent. Abdomen at base slightly narrower than the elytra^ 

 slightly wider behind; sides straight; border very thick but not very 

 deep; surface minutely granulose, rather coarsely, very densely punc- 

 tate toward base, more sparsely so toward apex. Legs short and very 

 robust. Length 4.2 mm. 



Iowa (OedarKapidsl); Illinois 2. Dr. Brendeland Mr. Lugger. 



This species is one of the giants of the genus and is very distinct 

 in all its characters, but cannot be generically separated, as far 

 as can be judged without dissection. 



The individual facets of the eye are large and very much less 

 strongly convex than in any other species which I have examined. 



43 T. incertus n. sp. — Slightly robust, piceous; elytra rufescent; ab- 

 domen black; legs and antennae flavate; pubescence very fine, shorty 

 not dense; integuments shining. Head very slightly wider than long, 

 scarcely perceptibly narrower than the prothorax, broadly convex, 

 strongly reticulate or subgranulose, the punctures very minute and not 

 distinct among the reticulations; prominences not very strong, mode- 

 rate in size; eyes rather large and finely faceted, convex and somewhat 

 prominent, the tempora scarcely one-half as long, rounded and equally 

 prominent; antennae short, rather slender, somewhat strongly in- 

 crassate, about as long as the head and prothorax; outer joints distinctly 

 transverse, two to four rapidly shorter, fourth scarcely wider than long. 

 Prothorax one-third wider than long, widest near anterior third, where 

 the sides are rather strongly rounded and coarctate to the apex, feebly 

 convergent and nearly straight toward base; the latter strongly arcuate, 

 four-fifths as wide as the disk and subequal* to the apex; the latter very 

 feebly arcuate; apical angles narrowly rounded; disk very obsoletely 

 bi-impressed, the impressions interrupted, finely and obsoletely sub- 

 reticulate, very minutely, feebly punctate, the punctures separated by 

 three or four times their own widths, except near the sides, where they 

 become abruptly coarse and dense, with the surface dull. Elytra 

 slightly shorter than wide, one-third wider and one-half longer than 

 the prothorax, distinctly impressed on the suture toward base, rather 

 finely and sparsely punctate, the punctures four times as wide as those 

 of the prothorax, separated by more than their own diameters. Ab- 

 domen distinctly narrower than the prothorax, parallel; sides very 

 feebly arcuate; border moderate; surf ace very obsoletely and somewhat 

 finely reticulate, minutely and sparsely punctate. Legs rather slender. 

 Length 1.8 mm. 



Tennessee 3. Mr. Otto Lugger. 



This species is somewhat intermediate between the two groups 

 IV and V, as shown by the increase in the size of the eye and 



