AMERICAN rOLEOPTERA. 3 



rogulaily oval ; in front of the median pair of tubercles an irregular 

 fiirure resembling the letter "k," the vertical line being toward the 

 middle and the bottom of the letter toward the front. This latter figure 

 varies somewhat, but the sculpture as above described is that which is 

 characteristic of the entire group. The space between these elevated 

 portions is opaque and clothed with a cinereous or luteous indument, 

 as is also the space between the elytral tubercles. 



With the known variation of jiunctatus and suherosus, as shown by 

 the large series before me, I cannot see that any of the above men- 

 tioned forms are entitled to rank as species. 



Varies greatly in size. Length .60 — .80 inch; 15 — 20 mm. 



Occurs in Texas, New Mexico, Kansas and also in Mexico. 



T. scabrosus, Beauv. Ins. p. 175, ])1. 4b, fig. 4; Lee. Proe. Acad., 1854, p. 

 215; Harold, loc. cit. p. 100. 



The surface of this species is almost always concealed by a brown- 

 ish opaque coating. The thoracic sculpture is a modification of that 

 described in sciifel/aris, having the basal tubercles more elongate and 

 coated as the remainder of the surface; the " k "-shaped figure is also 

 less distinctly marked. The sides of thorax are rather irregular and 

 near the base deeply notched, the hind angle being in the form of a 

 rounded lobe. The base of thorax is rather acutely lobed at middle. 

 The elytra are oblong in form and with moderately elevated oblong tu- 

 bercles having a tomentose summit. Between the rows of larger tuber- 

 cles is a secondary series of smaller size and less elevation, also tomen- 

 tose at top and on each side of these secondary tubercles a row of round- 

 ed granular elevations, while the surface between all these elevations is 

 nearly smooth. The basal joint of the antenuge, the labrum and 

 mandibles are clothed with stiflF brown hair and the club of the an- 

 tennae is of sooty color. 



The presence of the triple series of tubercles in this species affords 

 an easier method of distinguishing it from the two following than the 

 color of the hairs of the basal joint of the antenna3. The median 

 tooth of the anterior tibite is also more distinct. Length .60 — .70 

 inch ; 15 — 18 mm. 



This species occurs in nearly the entire region east of the Missis- 

 sippi river and south of the lakes, but is much more abundant in the 

 Gulf States. 



T. nionac-hns, Ilerbst, Kiifer, iii. p. 25, pi. 21, fig. 7; tlarold, loc. cit. p. 

 116; tuberculatum \\ Beauv. Ins. p. 175, pi. 4b, fig. 3; pmtulatus, Lee. Proc. Acad. 

 1854, p. 215. 



