Classification of the Coleopterous family Dynastidm. 323 



group consists of smaller species of rather varied form and 

 is apparently confined to Tropical Asia. The type species 

 is Hctcronydius jnccus^ V- {= Pldknrns detractiLs, Walk.), 

 and I refer to it also //. crihratcUu>i, Fairm., H. iMuper, 

 Burm. {=" If. simjjlca', Waterh. and H. intcrruptits, Fairm.) 

 and the following new species : 



Alissonotivm crassiLin, sp. n. 



Robustum, ovatum, nigrum nut nigro-piceum, capite crebre 

 punctato-rngoso, fronte sat fortiter bituberculato ; prothorace fortiter 

 et crebre punctato, medio laavius, disco antice lasvissime impresso et 

 tuberculato ; scutello impunctato ; elytris fortiter striatis, stria prima 

 vix punctata, cseteris grosse irregulariter punctatis, interstitio prime 

 confuse punctato, 3° et 5° partim seriato-punctatis, lateribus minute, 

 apicibus grosse et crebre, punctatis ; propygidio leviter rugose, postice 

 medio producto ; pygidio parce punctato. 



Long, 19-21 mm. Lat. max^ 11 mm. 



Hah. Assam : Silhet ; Burma : Bhamo, Tenasserim. 



This is a large, black, oval insect. The head is coarsely 

 rugose and bituberculate above. The prothorax is closely 

 punctured, the punctures being coarse except along the 

 middle, where they are fewer and fiuer. There is a faint 

 impression near the middle of the anterior margin and a 

 minute elevation in front of it. The scutellum is broad and 

 smooth. The elytra are deeply striated, the sutural stria 

 being scarcely punctured and the remainder rather strongly. 

 The first interval is very broad and irregularly punctured 

 and the 8rd and 5th have each an incomplete line of 

 punctures. The outer margins are finely, and the extremi- 

 ties coarsely, punctured. The propygidium is produced in 

 the middle and bears two long and finely striated files. 

 The remainder of the surface is finely rugose and pubes- 

 cent. The pygidiuni is rather finely j)unctured. The 

 sexes are alike. 



Alissonotum impressicolle, sp. n. 



Ovatum, nigrum, nitidum, capite crebre rugoso, bituberculato ; 

 prothorace fortiter baud dense punctato, medio subtilius, antice 

 laivissime impresso et elevato ; scutello impunctato ; elytris fortiter 

 punctato-striatis, striae prima3 punctis toto confluentibus, interstitio 

 primo irregulariter, 3° et 5" lineare, punctatis, lateribus et apicibus 



