Longicornia Malay ana. 487 



The figure given by Mr. White was taken from an 

 infei'ior example, and scarcely does justice to this re- 

 markable insect ; I have, therefore, thought it desirable 

 to give a representation of one of Mr. Wallace's mag- 

 nificent specimens. 



POLYXO. 



Polyxo, J. Thomson, Syst. Ceramb. p. 32. 



Characteres ut in Tmesisterno, sed prothorax lateraliter 

 marginatus, infra marginem dente minuto armatus. 



The first four species described below are entirely 

 homogeneous, but the remainder, except for the charac- 

 ter of the prothorax, seem more related to Tmesisternus. 

 Only one of these, judging from my specimens, has the 

 broadly dilated prothorax of these typical species, but the 

 whole show the margination which differentiates the 

 genus. 



§ Prothorax very broad and muclt dilated at the sides. 

 Middle of the head, and prothorax, and large centro-basal 

 spot on the elytra, glabrous, glossy hroivn, and impunctate. 



Polyxo viridescens . 



J. Thomson, Syst. Ceramb. p. 32. 



P. fusca, grisescenti-pubescens ; scutello transversim 

 ovato, apice subacute; elytris subtiliter sparsim 

 punctatis, apicibus emarginatis ; antennis, tibiis, 

 tarsisque rufescentibus. 



Hah. — Ceram, Amboyna, Dorey. 



Dark brown, with a short rather close grayish pubes- 

 cence,here and there the pubescence denser,causing a varia- 

 tion of colour ; scutellum transversely ovate, the apex a little 

 produced ; punctures on the elytra small, very few and 

 scattered, centro-basal patch not surrounded with grayish, 

 spots, apices broadly emarginate ; body beneath dark 

 brown, very glossy, the sides with a grayish pile; an- 

 tennae, bases of the femora, tibiae and tarsi pale fulvous 

 red. 



Length 9-11 lines. 



