4 a. H. HORN, M. D. 



More oblong and of less robust facies than the preceding species 

 The thoracic sculpture is similar and the entire surface of body simi- 

 larly invested. The notch near the hind angles is nearly as deep as irf 

 acahronua, but the angular lobe less prominent, wliiU- the sinuation of 

 the base immediately within the angle is much more pronounced. The 

 elytral sculpture consists primarily of five series of tubercles (of which 

 the sutural is smaller) of more or less oval form rather distantly placed 

 and in each row alternating with the next, and at their summits 

 tomentose. The spaces between the tubercles are finely l)ut sp ir.sely 

 granulate. At the apical fourth of the elytra one of the tubercles of 

 the third series is much larger, and on the fourth and fifth series a 

 similarly enlarged tubercle but of less size than that of the third. This 

 character is scarcely evident in scabrosus and much less distinct in 

 axpcr than in the present species. 



The hairs of the basal joint are very pale brown, and the antennal 

 club rufous. Length .50 — .64 inch.; 13 — 16 mm. 



In very well preserved specimens it will be noticed that certain 

 individuals have the spur of the anterior tibiae straight, and others very 

 distinctly arcuate near the tip. This appears to me to afford the 

 means of distinguishing the sexes, the former being females and the 

 latter males ; as the spurs are almost always more or less worn the 

 character becomes as useless for the determination of the sexes as is 

 the knowledge acquired by its presence. 



Occurs in the Southern States and also west of the Mississippi from 

 Kansas to Teias. 



T. a««por, Lee. Proc. Acad. 1854, p. 215 ; Harold, loc. clt. p. 118. 



The notch at the side of the thorax is less deep than in the preced- 

 ing two, the angular lobe less prominent and the sinuation within it 

 less markeil than in monarhiiii. The elytral tubercles are here elong- 

 ate and closer together, and their summits tomentose except a glabrous 

 space at the anterior portion of each. In the interval between the rows 

 of large tubercles may be seen a row of small tubercles, on each side of 

 which is a row of moderately deeply impressed punctures. The an- 

 tennje are similar to those of monnchus, but the club is somewhat 

 darker. 



This species is somewhat smaller than the preceding, being rarely 

 longer than .50 inch ; 13 — 14 mm. 



Occurs with the preceding. 



The following species have the tubercles much less elevated, of oval 



