DESCRIPTIONS OF NEW SPECIES. 181 



49?. E. tiimida. Fusco-picea, dense minus subtiliter griseo-pubes- 

 cens, prothorace latitudine breviore, antice transversiin margiuato, 

 lateribus pone apicem subito rotundatis, spina lateral! minuta, parce 

 fortiter punutato, callis 4 denudatis ante medium transversim sitis, 

 intermediis elatioribus ; elytris haud dense punctatis, apice paulo 

 truncatis, spina externa obsoleta, suturali distincta, callis eburneis 

 parvis discretis. Long. 15 20 uim. 



Texas ; the body beneath is densely punctured, clothed with 

 rather coarse pubescence. The ivory spots of the elytra are small, 

 in one specimen the outer one of the hind pair is longer than the 

 inner one, and the spots of the basal pair are nearly equal ; in a 

 second specimen the outer basal spots are nearly obliterated, and 

 the hind pair are reduced to merely elevated points. The front 

 coxae not at all angulated externally. 



ELAPHIDION SERV. 

 Sub-Genus ROMALEUM WHITE. 



The species of this sub-genus differ from genuine Elaphidion 

 by the more robust form, and by the episterna of the metathorax 

 being distinctly wider in fr6nt, and gradually narrowed behind, 

 though much less so in the 2d division than in the 1st. The 

 prothorax is comparatively wider, and has a slight tendency to 

 a tubercle on the sides ; the pronotum is coarsely punctured with 

 a medial and two dorsal callosities in 9, very densely punctulate, 

 with a posterior medial channel and dorsal cicatrices in the . 

 The antenna? are longer than the body in , shorter in 9 , the 

 spines are never long, the sensitive spaces are distinct, commenc- 

 ing on the 4th joint in a small elongate depression, extending on 

 the following joints so as to occupy gradually the whole length ; 

 a very small fovea may be usually seen near the end of the 3d 

 joint. The prosternum is always rounded behind, and the meso- 

 sternum gently declivous. The femora are not spinose. The 

 last joint of the palpi is less dilated than in genuine Elaphidion. 



The species form two natural groups : 



A. Body uniformly finely pubescent ; 



Both angles of 3d and 4th joint of antennae spinose. 1. PEOCEEITM. 

 Outer angle of 3d and 4th joint spinose. 2. SIMPLICICOLLE. 



B. Body irregularly pubescent, with spots of coarser and denser hair. 

 Pubescence mottled, irregular. 3. ATOMARIUM. 

 Pubescence uniform, fulvous. 4. RUFCLDM. 



