LOXOPKOSOPTJS. 151 



elongation of the antennae ; other groups, confessedly not Galerucidae 

 (e. g. Hypocephalus armatus, Necrodes, and Sagra), have the thick- 

 ened posterior thigh ; and some, like the genus Orchestes, have even 

 the power of leaping. The structure of the maxillary palpi, how- 

 ever (combined with the globular inflation of the posterior claw), 

 seems to be decisive, and leads us, without hesitation, to admit 

 the genus into the present group, as very nearly allied to Octo- 

 gonotes. 



In this genus, the males are at once to be recognized from the 

 females by their enormously elongated antenna ; the thorax, more- 

 over, in the 3 is less broadly transverse, more nearly quadrate, 

 the elytra are slightly less robust, the head is narrower and longer, 

 the eyes are larger and more globose, and in the antennae the two 

 basal joints are very much more robust, as well as elongated. 



1. Loxoprosopus ceramboides. (TAB. VI. fig. 1.) 



L. ( c? ) oblongus, ovalis, subdepressus, parallelus, niger ; capite 

 leviter producto, reflexo, nigro ; thorace transverse, rectangularly 

 ad medium depresso, rufo-marginato, nigro ; elytris subpubes- 

 centibus, punctato-striatis, nigris, rufo marginatis ; antennis lon- 

 gissimis, fusco -nigris ; pedibus fusco -nigris. 



d Long. corp. 4| lin., lat. If lin. 

 c? Long, antenn. 10-11 lin. 



Oblong, oval, parallel, subcylindrical, slightly depressed. Head 

 very short and transverse (when viewed from above) ; at the inser- 

 tion of the antennae (which are contiguous), the head is sharply re- 

 flected at an acute angle (the anterior part being inclined backwards 

 in the direction of the thorax), and slightly produced ; eyes tolerably 

 prominent, not large, situated at the base of the head, extending 

 laterally nearly to the line of the apical angle of the thorax : the 

 antennae (when viewed from above) appear to be situated on a gibbous 

 projection, which stands out from beyond the line of the eyes ; this 

 projection is divided by a longitudinal channel, is well-defined, and 

 also bounded at the base by a distinct transverse shallow groove ; at 

 the extreme apex of this projection are two globular fuscous sockets, 

 from which spring the base of the antennae ; surface below the an- 

 tennae subpubescent, leevigate, black, with a narrow margin on either 

 side pale testaceous; above the antennae finely granulated, black. 

 Thorax slightly broader than the head, transverse, rectangular, equate, 

 without any important definite elevations (a slight shallow fovea is 

 apparent at the middle of the disc) ; anterior angles subacute, sides 

 marginate ; surface almost impunctate, obsoletely pubescent, black ; 

 margination of the sides fulvous. Scutellwn obscure, triangular, black. 



