Longicornia Malayana. 305 



Diochares impluviatus. 



D. niger, pube alba variegatus ; elytris angiistatis, apicibus 

 sub-truncatis. 



Sah. — Tondano. 



Black, varied with a coarser white pubescence ; head whitish 

 in front, the lines round the eyes and on the vertex and prothorax 

 precisely as in the preceding; scutellum white in the middle ; 

 elytra narrow, granulate on the shoulders, finely punctured, white, 

 speckled with black, the black predominating along the suture at 

 the base and middle and forming irregular patches, the apices 

 sub-truncate ; body beneath and legs with a pale ashy pubescence ; 

 claw-joint not longer than the two preceding joints together ; 

 antennae blackish, twice as long as the body. 



Length 6 lines. 



Trysimia. 

 Caput antice sub-quad ratum, clypeo truncate ; tuberibus anten- 

 niferis validis. Oculi mediocres, lobo inferiori rotundato. 

 Antennce longissimae ; scapo obconico, valde cicatricoso ; 

 articulo tertio scapo duplo longiore ; quarto breviore ; caeteris 

 sequalibus, ultimo excepto. Prothorax longitudine baud 

 latior, lateribus sub-rotundatis, tuberculo minuto instructis. 

 Elytra sub-trigonata, apicibus rotundatis. Pedes elongati, 

 insequales, antici longiores ; femora incrassata ; tarsi aequales. 

 Mesosternum baud dentatum. 

 This genus differs from Monochamus only in its sub-quadrate 

 face, and the small lateral tubercle of the prothorax replacing the 

 stout tooth of the latter. It comprises two very distinct but 

 cognate species. 



Trysimia geminat a. (PI. XIV. fig. 2.) 

 T. fusca, leviter griseo-pubescens ; elytris albo-irroratis, prae- 



cipue maculis quatuor majoribus. 

 Hab. — Bouru, Ceram, Amboyna. 



Dark brown, with a thin uniform greyish pubescence ; head im- 

 punctate, a black glabrous mark at the angle of the mouth below 

 the eye ; prothorax impunctate, an indefinite blackish spot in the 

 centre ; scutellum rounded posteriorly ; elytra granulate at the 

 base, the granules gradually passing into punctures, which disap- 

 pear near the apex, several small greyish spots composed of a 



VOL. in. THIRD SERIES, PART III. SEPT. 1866. X 



