422 Mr. F. P. Pascoe on new Neotropical Curculionidce. 



the apices rounded and not produced, behind the middle a 

 band of black spots, those near the suture partially coalescing, 

 an irregular spot posteriorly, and a smaller one near the 

 shoulder. 



Allied to C. effusus, but different in coloration and sculp- 

 ture of the elytra. The difference between Cyphus and 

 Platyomus is not well marked. Germar included the species 

 known to him under the former name ; and both genera con- 

 tain species which, from their outward appearance, would not 

 be supposed to have any generic affinity. Compsus was first 

 separated as a genus from Platyomus by Lacordaire ; among 

 other minor characters, it is best distinguished by the mucro- 

 nate anterior tibia?. To Cyphus I refer those forms which 

 have the rostrum not enlarged at the tip as in Platyomus, 

 lateral scrobes, and a more slender scape. A remarkable form 

 bearing a strong resemblance to a Mutilla (Hymenoptera) 

 was proposed to be generically separated by Germar under 

 the name of Trichaptus ; but the genus was never published. 

 It was first described as a Rhiyushy Perty (R. myrmosarius). 

 It is, I think, a far better genus than many others whose 

 claims have never been questioned. The following are its 

 principal characters : — 



Trichaptus. 



Caput transversum. Rostrum breviusculum, capite multo angus- 



tius ; scrobe ab insertione antenna*, transversa, oculnm tangente. 



Prothorax gibbosus, basi quam medio angustior. Elytra elevata, 



valde convexa. Cetera ut in Cypho. 



The essential character of this genus is in the direction of 

 the scrobe, which, beginning near the mouth, takes a sudden 

 bend and passes transversely beneath the eye, which, indeed, 

 forms part of its upper boundary. The only species was sub- 

 sequently named by Boheman Cyphus Linnet, after " the 

 first of naturalists, past, present, and future." But, then, this 

 was in 1833. 



There is another species which, as Lacordaire has pointed 

 out, should be also separated from Cyphus. It is the Cyphus 

 Hancockii of Kirby, one of the handsomest of the Curculionida?. 

 It differs in having the anterior tibia? mucronate as in Compsus, 

 and in the grooved lower and hind margin of the posterior 

 and intermediate tibia?, which is also densely ciliated. The 

 principal characters of this genus, for which I propose the 

 name of Erieydeus, are as follows : — 



Ertcydeus. 



Caput haud latius rostro. Antenna' artioulo primo funiculi per- 

 brevi. Tibia; antica; inucronata?, intermedia? et postica? extus 



