produced. The thorax is short find very broad, very uneven, the disc 

 having a broad, transversely-placed, trilobed groove or pit, coarsely 

 punctured like the sides, the elevated parts of the disc being smooth. 

 The extremely large scutcllum has a few punctures ; the elytra are 

 shagreened between the polished cost® and near the apex, where the 

 costae terminate in irregular ramifications. The base of the elytra is 

 very sparingly and more coarsely punctured. The prosternum differs 

 from that of the other two species in being conically and strongly 

 elevated between the branches. 



YESPEEOCTENUS, nov. gen. 



Gen. Vespero {Latr.) affinis, a quo dijfert inter alia antennis, $ , longe 

 pectinatis elijtrisque utroque sexu corporis apicem attingentibus. 



This anomalous form of Longicorn is, without doubt, closely 

 allied to the European geuus Vesperus, although beyond the pallid 

 colour and the softness of the integuments there is little general 

 resemblance. The head is transverse-quadrate behind the eyes, in 

 both sexes, and the neck suddenly constricted. The eyes, as in 

 Vesperus, are coarsely facetted, but they are more reniform, being 

 siuuated on the upper inner edge. In the ? , which can be most easily 

 examined owing to its freedom from the dense pile of the (^,the fore- 

 head below the antennae emits a laminiform projecting ledge, deeply 

 notched in front, below which is the subvertical ej)istome, followed 

 by the articulated labrum, densely ciliated on its front edge. The 

 mandibles are long, porrect, curved only near the apex, and irregularly 

 dentated on their inner side, with an angle (indicating the commence- 

 ment of a tooth) on the outer edge at the bend ; in miniature they 

 resemble the mandibles of Macrodontia cervicornis. The palpi are 

 elongate, the terminal joint short, ovate. The thorax is similar in 

 form to that of V. Xatarti, $ , but a little more dilated behind ; in 

 the J' it is short and trapezoidal. The pronotum has no lateral margin. 

 The elytra are elongate-cuneiform, nearly as in Toxotus. The anterior 

 coxa; are strongly exserted and parallel. The elytra are entire in both 

 sexes, and of thin, flexible texture. The legs are slender, the tarsi 

 four-jointed : the first much the longest, and, like the second, Avith pro- 

 duced apical angles ; in the third joint the angles arc still more pro- 

 duced ; the true fourth joint is visible as a small nodule at the base of 

 the claw joint. The hindmost legs in the ? are widely separated at 

 their base. In the (J the abdomen is short and conical. The antennas 

 in the ? are 12-jointcd, filiform, simple, about half the length of the 

 body ; in the ^ they are equally 12-jointed, three-fourths the length 



