618 Longicornia Malayana. 



external angle smaller ; the greatest difference, however, 

 ■which is doubtless specific, is in the much shorter pos- 

 terior tarsi, which at once strikes the observer. My 

 specimens, judging chiefly from the length of the pos- 

 terior femora, appear to be males. The shortness of the 

 antennee is remarkable. 

 Length 4| lines. 



Perissus cemulus. 



P. niger; fronte planata; prothorace late ovato, nigri- 

 cante, distincte granulate; elytris nigris, cinereo- 

 quadrifasciatis, apicibus oblique emarginatis. 



Hob. — Sarawak. 



Black ; head without a median line ; prothorax broadly 

 ovate, blackish, covered at short distances with small 

 very distinct granules ; scutellum rounded behind ; elytra 

 rather short, scarcely so broad as the prothorax, black, 

 with four ashy bands, the first basal, curved behind, the 

 second a curved line directed upwards and meeting at the 

 suture, the third slightly triangular, the fourth an oblique 

 patch close to the suture ; body beneath ashy, the last 

 three segments blackish ; legs blackish, the tarsi and 

 antennae pale brown; in one specimen the sixth and 

 seventh joints of the antennge paler than the rest. 



Length 4-4| lines. 



There is a smaller and narrower species, also from 

 Sarawak, nearly allied to this, but imperfect. 



SCLETHRUS. 



Sclethrus, Newman, The Entom. i. 247; Lacordaire, 

 Gen. ix. 80. 



Caput subverticale, antice paulo productum. Oouli 

 prominentes, fere rotundati, vel vix emarginati. 

 Antennce breves, graciles ; scapo crassiusculo ; arti- 

 culo tertio duobus sequentibus longiore, 3-6 apice 

 spinosis. Prothorax cylindricus, elongatus, curva- 

 tus, capite paulo angustior. Elytra elongata, an- 

 gustata, cylindrica, apicibus truncatis. Pedes gra- 

 ciles ; femora paulo incrassata ; tarsi postici caeteris 

 paulo longiores. Presternum simplex; mesosttrnum 

 elongatum, declive. 



