Longicornia from Africa and Madagascar. 299 



Anceme {MonodesmiiKB) , n. g. 

 Head large and, together with the eyes, nearly as broad as the 

 prothorax in the middle ; very convex below, mandibles horizontal. 

 Palpi with their last joint quite cylindrical. Eyes large, closely 

 approximated above, moderately separated below, reaching almost 

 to the base of the mandibles in front. Prothorax tranverse, rather 

 short, obtusely dilated at the middle of each side, and provided 

 with a lateral carina which curves down on each side from the 

 posterior border to reach as far as the outer termination of the 

 coxal cavity. Elytra rounded at the apex, each with a single lon- 

 gitudinal keel placed on the disk. Antennae longer than the body 

 {3')i with the scape rather short, the third joint almost twice 

 as long as the scape, the fourth and following joints slightly and 

 gradually decreasing in length. With the joints from the third to 

 the tenth compressed towards the inner border, and each angulate 

 at its inner apical termination. Legs subequal, the posterior a 

 little longer ; femora rather short, strongly enough compressed and 

 dilated. Anterior coxae strongly transverse ; the anterior cotyloid 

 cavities widely enough open behind. 



This genus has been necessary for the reception of A. 

 nif/rita, Chev., a species altogether foreign to the genus 

 Oeme, in which ChevroJat and Andrew Murray had 

 placed it, and one on which Murray relied to support his 

 favourite theory of a connection between the fauna? 

 of Africa and South America. The genus forms one of 

 the connecting links between the Prionidce and Ceram- 

 hijcidce, and, according to Lacordaire's system, ought to 

 be placed in the former rather than in the latter family. 

 The palpi are of a form very exceptional in both these 

 families, and resemble more those of the Lamiida. 



Type : — A. nigrita. 



Oeme nigrita, Chev. Eev. et Mag. de Zoologie, 1855, 

 p. 183. 



Oeme nigrita, Murr. Ann. and Mag. Nat. Hist., 4 Ser., 

 vol. vi., p. 166, pi. 2, fig. 1. 



Hah. Old Calabar. 



CEEAMBYCIDJ^. 



Xystrocera chalyheata, n. sp. 



Chalybeata, subopaca; prothorace minutissime creberrimeque 



punctulatis, dorso postice ( $ ) plaga, scutiforma, sul)nitidii, ; elytris 



rugoso-inmctatis, singulis liueis duabus vel Iribus vi\ clevatis ; 



X 2 



