—6b— 



Synopses of Cerambycidae. 

 By Chas. W. Leng, B. S. 



(Continued from p. 32.) 



CALLICHROMINI md TRACHYDERINI. 



These two tribes are for convenience considered together. The) in- 

 clude all the Longicorns with a triangular scutellum, more or less acute, 

 and varying considerably in size. The species belong almost entirely to 

 the warmer parts of the country. The arrangement of genera is as 

 follows: 



I'Yont coxal cavities closed behind Callichroma. 



front coxal cavities open; 

 Mandibles acute or simple at tip: 



I'ronotum broadly lobed at base; poriferous system of antenna; very distinct: 



Metnsternal pores absent, side pieces very wide Megaderus. 



Metasternal pores distinct 2 



Pronotum not lobed, sometimes subsinuate at base, poriferous system often ob- 

 solete, and palpi in some genera scarcely impressed 3 



Mandibles emarginate at tip $ 



2 Prothorax strongly armed on sides Dendrobias. 



I'rothorax uniformly convex Lissonotus. 



3 Front large, square, perpendicular, abruptly separated from the ante-ocular space: 



Presternum vertical behind Stenaspis. 



Presternum arcuate at tip. 



Elytra distinctly margined at the sides Crioprosopus. 



Elytra not or obtusely margined ; » 



Prothorax armed with a lateral spine: mesosteraum not protuberant; 



Body pubescent Tragidion . 



Body glabrous, $ elytra costate Purpuricenus. 



Body glabrous, ^ without antennal tubercles Metaleptus. 



Prothorax rounded, convex /Ethecerus. 



front moderate, short, declivous, not abruptly defined each side; 

 Two ivory vitta; on each elytron ; prothorax margined at apex ; 



Mesosternum declivous Mannophorus. 



( )ne ivory vitta on each elytron; prothorax not margined at apex. 



Mesosternum protuberant Entomosterna. 



Elytra without ivory vittae, mesosternum declivous; 



Body pubescent; prothorax not margined at apex Amannus. 



Body pilose; prothorax margined at apex Batyle. 



4 Elytra without ivory vittae; 

 I'rothorax with an acute lateral spine: 



Kyes not divided; pubescence fine Oxoplus. 



Eyes divided; pubescence coarse Schizax. 



Prothorax rounded on sides, with dorsal callosities ... Tylosis. 



I'rothorax rounded on sides, or feebly spinose, without dorsal callosities, pube 



scence long and partly errect Crossidius. 



Prothorax narrowed in iront, mesosternum convex Sphaenothecus. 



Each elytron with two ivory vitta?, prothorax narrowed in front: 



