190 GEO. H. HORN, M. U. 



MONIL,EMA Say 



M. annulatum Say, Journ. Acad. 1824, p. 404: Leo. Journ. Acad. 1852. ii, p. 

 1(37: Lac. Gen. Atl. pi. 97, fig. 2. 

 M. appressum Lee. loc. cit. p. 168; Col. Kans. 1859, p. 21. pi. 2, fig. 17. 

 M. gigas Lee, ISTew Species, 1873, p. 230. 

 M. semipunctatum Lee, Journ. Acad. 1852, ii, p. 167. 

 M. laevigatum Bland, Proc. Ent. Soc. Phil, i, p. 267. 



M. armatum Lee, Proc. Acad. 1853, p. 234 ; Arcana Xatura;, p. 128, pi. 1 3, fig. 2. 

 M. obtusum Lee, New Species, 1873, p. 230. 

 M. spoliatum Horn, supra. 

 M. forte Lee, New Species, 1873, p. 230. 

 M. subrugosum Bland, loc. cit. p. 268. 

 M. Ulkei Horn, supra. 

 M. variolare Thorns., Physis. i, p. 77. 

 M. crassum Lee, Proc. Acad. 1853, p. 234. 



I*IOi\OIIA.n.lIUS Serv. 



In separating the species of this genus by means of the presence or 

 absence of sutural prolongation of the elytra care should be taken that 

 the male alone is relied upon, the females being variable. In well de- 

 veloped males of titillator alone, do we find a true sutural spine. In 

 macvlosus there is never a spine but the sutural angle is always pro- 

 longed slightly, while in scutellatus the elytra are always obtuse at tip in 

 both sexes. The well known con/usur has the apices obtuse, the sutural 

 angle often rounded. In marmorator the apices of the elytra are ob- 

 liquely prolonged and acute. 



In all the species the male antennae are quite roughly punctured and 

 without pubescence, the female antennae very much smoother and clothed 

 with a fine cinereous pubescence on the basal half of each joint from the 

 third except in confusor, in which the whole of each joint is pubescent. 



The character made use of by Dr. LeConte for the separation of ore- 

 ijonensis and scutellatus — the denuded medial stripe of the scutellum in 

 the first — is evanescent. 



From the foregoing remarks it will be inferred that the number of 

 specific names in our lists is greater than the number of true species. 



From the evidences of my series the species may be separated in tlu' 

 following manner ; 



A. — Tips of elytra rounded, the sutural angle acute or spiniforin, more especiallj' 

 in the male. 

 General surface color brownish, the elytra irregularly mottled with patches 



of brown and gray or white pubescence titillator. 



General surface color piceous or black, more or less bronzed, elytral orna- 

 mentation as above, the surface sculpture coarser and deeper. 



iiiacuIosu!«. 



