212 [DECEMBER; 



capillary striae appear strongly punctured with an intermediate row of small 

 distant tubercles. The anterior tibiae are furnished with a broad bidentate ter- 

 minal process, and one well-marked tooth at the middle ; they are finely serrate 

 towards the base. The anterior femora are very strongly dilated and crenate 

 on the inferior margin. The head is somewhat more unequal than in T. alter- 

 nans. 



4. T. po r c at u s, niger, sordidus, thorace longius flavo-ciliato, sordidebreviter 

 setoso, latitudine duplo breviore, lateribus antice rotundatis, inequaliter punc- 

 tato, medio bicostato, sutura costisque interruptis elevatis rlavo-setosis, costis 

 alternis minoribus fere indistinetis, interstitiis punctis magnis quadratis seriatis 

 stria capillari coniunctis. Long. 4 # 46. 

 Say, Journ. Acad. Nat. Sc. 5, 193. 



Middle and Southern States. The sides of the thorax are straight for three 

 fourths of their length, and are then rounded to the apex ; the punctures of the 

 elytra are connected by striae, and the inequalities diminish towards the tip. 

 The anterior tibiae are serrate towards the base, with one sharp tooth at the 

 apex: the femora are very much dilated, and hardly crenulate on the inferior 

 margin. In the form of the thorax this species is allied to T. capillaris, 

 but in that species the capillary striae of the elytra are much stronger, the costae 

 are less distinct, forming merely rows of distant penicellated elevations, and 

 the rows of punctures are not very obvious. 



5. T. tuberculatus, obiongus, niger, thorace latitudine plus duplo bre- 

 viore, lateribus late rotundatis, inaequali, partibus elevatis breviter fulvo-setosis, 

 dorso elevato, bicostato, elytris tuberculis valde elevatis oblongis brevissime 

 setosis, quadriseriatim positis, interstitiis parce quadriseriatim murieato-punc- 

 tatis, suturaque tuberculis parvis uniseriatim notatis. Long. *3 37. 



Herbst, Kafer, 3, 24 ; tab. 21, fig. 6 : Oliv. Ins. 4, p. 9 ; tab. 2, fig. 8. 



Scarabceus tuberculatus, De Geer, 4, 317; tab. 19, fig. 2. 



Trox serrulatus, Beauv. Ins. 176, tab. 46, fig. 9. 



Trox canaliculatus, Say, Long's Exped. St. Peter's 2, 278. 



Middle and Southern States, not rare. Besides the apical emarginate process, 

 the anterior tibiae have only one prominent tooth at the middle ; above this are 

 some fine crenulations. This species is not much like T. sabulosus of 

 Europe, with which Olivier compares it, but is the only one known to me that 

 will agree with the descriptions or figures. 



6. T. erinaceus, minus elongatus, subovatus, niger, thorace latitudine fere 

 triplo breviore, lateribus late rotundatis, setis nigris penicellato, dorso bicostato, 

 elytris striis distinctis, interstitiis parce muricato-punctatis interstitiis 3, 5, 7 7 

 9 tuberculis valde elevatis, oblongis, acutis nigro-penicellatis, serie suturali 

 paulo minore ornatis. Long. 25. 



South Carolina, Mr. Zimmermann. The intervals between the series of large 

 elevations are marked with a scarcely distinct series of tubercles, hardly 

 larger than the scattered elevated punctures. The denticulations of the anterior 

 tibiae are not distinct, but one near the middle is a little more prominent. 



7. T.terrestris, breviusculus, ovatus, niger (praecipue sordidus), tho- 

 race latitudine duplo breviore, lateribus vix late rotundatis, subreticulatim 

 inaequali, elytris punctis quadratis seriatis, interstitiis alternis elevatis subin- 

 terruptis, brevissime sordide setosis, alternis (alteris) parce muricato-punctatis^ 

 Long. -21 -24. 



Say, Journ. Acad. Nat. Sc. 5, 192. 



Middle and Southern States, abundant. The inequalities of the thorax are 

 less developed than in those above described, and are connected together so as 

 to give a reticulated appearance ; five of the cells are adjacent to the base, and 

 three fill up the apex. The anterior tibiae, besides the universally found square 

 apical prominence, have only one moderate tooth below the middle. 



8. T. capillaris, longiusculus, ovatus, sordide niger, thorace parce 

 setoso, latitudine vix sesquibreviore, lateribus fere rectis, inaequali, dorso bicos- 



