270 [M=^y. 



on the other in the same individual ; tliis being the case, it must some- 

 times occur that, relying on these characters alone, genera are estab- 

 lished and closely allied species separated, on insufficient grounds. I 

 draw attention to this to point out that, where practicable, a series of 

 specimens should be examined and any deviation from the typical 

 form be noted. Where the anterior coxse are very prominent and the 

 hinder margin of the acetabulum is very narrow (as frequently occurs), 

 there is often greater difficulty in ascertaining the actual state of the 

 cavity, without either removing the coxse, or detaching the thorax from 

 the rest of the body. 



HiSPOnONTA PLAGIATA. 



Ovaia, depreasa, sordide JIava, nitida, antennis piceis ; thorace quam lorigo 

 dimidio latiori, laterihus rotundatis ; disco hasi et ad latera distiticte punctato ; 

 elytris seriato-punctatis, utrisque vix pone medium plagd magnci, male dejinitd, piced 

 instruciis. Long., 5 lin. 



Hah. : India ; a single specimen in my collection. 

 Front excavated and coarsely punctured ; vertex smooth, impunctate. Thorax 

 one-half broader than long ; sides rounded, the hinder angle with an obtuse tooth ; 

 disc smooth and nearly impunctate in front, its base, together with the sides, rather 

 coarsely punctured. Elytra much broader than the thorax, rather strongly seriate- 

 punctate. 



Closely resembling the pale varieties of H. janthina, Bland., 

 separated from that species by the much broader thorax, its sides at 

 the same time being more regularly rounded than in that insect. 



OXTCEPHALA WaLLACEI. 



'Elongata, postice vix ampJiata, modice convexa, nigra, nitida, elytris flavo- 

 fulvis, apice late nigro-cyaneis. Long., 7 lin. 



Hah. : Solomon Islands. 



Face strongly produced between the eyes, armed just below the antennae with an 

 obtuse tooth ; antennse rather less than half the body in length, filiform, slightly 

 compressed towards the apex. Thorax longer than broad ; sides straight and 

 parallel from the base to beyond the middle, then abruptly contracted to the apex ; 

 upper surface sub-cylindrical at the apex, flattened posteriorly, strongly punctured, 

 middle disc deeply foveolate on either side ; extending from the apex nearly to the 

 base, but narrowed posteriorly, is a smooth, impunctate space ; sides within the 

 lateral margin deeply excavated and coarsely punctured. Elytra regularly punctate- 

 striate ; each elytron with four elevated costas, the third from the suture obsolete on 

 the anterior half of the disc. 



The elongate tborax will at once separate the present species 

 from O. speciosa, Boisd. 



The Butts, Warwick : 



March, 1887- 



