MR. F. P. PASCOE ON THE CUItCULIONTDJE. 



465 



medium, altera apice approxiraata, et ad latera una media obsitis ; 

 corpore infra dense sulphureo-squamoso. Long. 3 lin. 

 Hab. Cayenne. 



Allied to C. Beschii, Fhs., but, inter alia, with a finer and not 

 deeply punctured prothorax, the punctate lines on the elytra 

 more delicate and the intervals smooth. The next species differs 

 also in sculpture, and in the manifestly shorter elytra. The three 

 have the scutellum obsolete or nearly obsolete, and the spur on 

 the anterior tibia3 much reduced *. 



Cholus iEMULUs. C. subellipticus, castaneus, nitidus, elytris magis 

 rufescentibus, supra citrino-plagiatus ; capite crebre punctato; rostro 

 antennisque rufo-eastaneis ; funiculi articulo prirao tnbus sequentibus 

 conjunctim sequali ; prothorace sat vage tenuiter punctato, limbo an- 

 tico utrinque citrino-squamoso; scutello obsoleto ; elytris brevioribus, 

 obconicis, minus remote seriatim punctatis, punctis majusculis, inter- 

 stitiis in certo situ transversim corrugatis, cavitatibus plurimis squamis 

 citrinis repletis ornatis, scil. tribus majoribus ut in prsecedenti, tribus 

 lateralibus et duabus antemediis minoribus; corpore infra citrino- 

 squamoso ; pedibus rufo-castaneis . Long. 2f lin. 



Hab. Amazons. 



* Lacordaire considers tbat the numerous species included by Schonherr in 

 Cholus ought, for the most part, to be excluded, to form several new genera. 

 While, however, it is very far from being homogeneous, I can find no sufficient 

 characters by which the species can be satisfactorily distributed into genera. 

 On the contrary, while there is absolutely nothing to separate JPolyderces, it 

 seems to me almost impossible in some cases to distinguish Archarias from 

 Cholus, the former differentiated, according to Lacordaire, by the intermediate 

 segments of the abdomen being angulated at the sides ; and therefore I have 

 not adopted either of those genera. Nevertheless, after an examination of most 

 of Schonherr' s species and a large number of new ones, several of which are here 

 described, I think it will be desirable to limit the genus, somewhat arbitrarily 

 it may be, as nearly as possible to such species as possess the following charac- 

 ters : — (1) eyes round or oval, (2) scape barely reaching the eye, (3) club of 

 the antennae distinct, (4) anterior coxas more or less widely apart, (5) anterior 

 tibia? unguiculated as well as mucronate at the apex. As to the ocular lobes, 

 they are certainly present in C. albo-cinctus and some others, and bordered with 

 vibrissas, which partly cover the eye, while in other species (parous, undulatus, 

 &c.) there is not a trace of them, the eye resting at some distance from the pro- 

 thorax. The femora, too, almost invariably thickened in the middle, are linear 

 in C. ductus, which is closely allied to C. albo-cinctus, in which they are in the 

 normal state ; but they are always furnished with a well-marked tooth beneath. 

 The mesosternum, sometimes strongly produced (laticollis, viduatus, &c), is ge- 

 nerally simple ; and there are gradations between the two. The outline, whether 

 rhombic or elliptic, or oval, and the serration of the elytra posteriorly are cha- 

 racters, as it seems to me, of only specific value. 



