AMERICAN COLEOPTERA. 7 



Elytral margin at base crenulate or serrulate sordidiis. 



12. Tubercles of elytra with erect brownish setee foveit'olli!-*! 



Tubercles squammulose, scales pale rufous terre!>if ri»«! 



10. Anterior tibise above the lateral tooth simple ^qtialiM! 



Anterior tibia above the lateral tooth serrulate 13. 



13. Elytral intervals equal; pubescent spots small, ronnd and distant; hind 



tarsi short, joints 2, 3, 4 not longer than wide Tascifer. 



, Elytral intervals slightly alternating, jiubescent spots longer; hind tarsi 

 with joints 2, 3, 4 distinctly longer than wide scabor. 



14. Elytral intervals with a single row of short erect seta; anterior tibise bi- 



dentate externally and crenulate near the base atrox. 



15. Elytra blaok, shining, intervals flat with very slight elevations, each bear- 



ing a single short seta; hind tarsi slender laticollis. 



16. Elytra black, shining, intervals moderately convex, very sparsely punctu- 



late and with sparsely placed, extremely short setse; strije coarsely punc- 

 tured; anterior tibife feebly bideutate externally; hind tarsi rather 



^^°'"*^ »$triatu»«. 



The above table is considerably changed from that of Harold, al- 

 though based on it. The first change that will be noticed is in the 

 position of erinaceus, I have associated it with copilhiris from the 

 entirely dark, nearly black, scale-like hairs which tip the tubercles. 

 All the following species have the hairs so much lighter in color that 

 contrast in the table is better preserved by tlie change. 



In order to avoid the use of characteis drawn fr, m t le length of the 

 hind tarsus as compared with the middle tibia, 1 have u.^ed the 

 thoracic sculpture as a basis, and from it arrange the species in such 

 sequence ;is appears the most natural from their general aspect. Tlie 

 gradual obliteration of thoracic, and change of elytral sculpture are 

 thus shown. Of the last five species four were unknown to Harold. 



T. tiiberoiilatus, Degeer, Mem. Ins. iv., p. 318, pi. 1<J, fig. 2; Oliv. Ent 

 1, 4. p. 9, pi. 2, fig. 8; Hbst. Kaf. iii., p. 23. pi. 21, fig. fi : Lee. Froc. Acad- 1854, p. 

 212; Harold, loc. cit. p. 155; serriilatus, Beauv. Ins. ji. 176, j.L 4b. fig 9; canali- 

 cii/(iU<.s, Say, Long's Exped. App. ii,, p. 278. 



Form oblong. Clypeus rotundato-angulate. Head punctured, 

 vested with four small tufts of hair sometimes forming a transverse 

 continuous line. Antennae rufous. Thorax narrower in front, sides 

 moderately arcuate, base on each side moderately sinuate; median 

 sulcus limited by an entire ridge on each side, rarely interrupted at 

 middle by a transverse elevation. Elytra with rows of moderately dis- 

 tinct, feebly elevated, tubercles with brownish suberect scale-like 

 hairs; intervals with much smaller tubercles. Prosternal procei-s 

 elevated in an obtuse ridge. Anterior tibicXi with one small marginal 

 tooth and above it subserrate. Posterior femora spinulose along the 

 hind margin. Length .36 — .40 inch; 9 — 10 mm. 



Occurs from Pennsylvania to Arizona and Kansas. 



