24 Mr. C. J. Galian on Longicorn Cohopiera 



Lachnoptcrus sociuSj sp. n. 



Aler : protliorace supra nitido, fere omnino transversim plicato, 

 sulcis duobus longitudinalibus autice conjunctis impresso ; elytris 

 rufescentibus, confertissime punctulatis, pube breve fulvo-auran- 

 tiaca sparsim obtectis ; anteiinis ( d" ) subgracilibus, corpore 

 pauUo longioribus. 



Long. 16, lat. 5 mm. 



Ilab. Philippine Islands. In the collection of Mr. Alex- 

 ander Fry. 



Deep black. Prothorax broadest just behind the middle, 

 somewhat glossj and almost wholly transversely wrinkled 

 above; the disk without smooth tubercles and with two longitu- 

 dinal impressions which anteriorly become more oblique and 

 unite at some distance before the apex. Elytra reddish, with a 

 short tawny-orange pubescence not thick enough to conceal 

 the very close and fine punctuation beneath it. Antennge in 

 the male rather slender, a little longer than the body. 



]n L. aimpenyiisj Newm., the only hitherto described 

 species of the genus, the prothorax is broadest at or a little 

 before the middle, is covered above by a dull black tomentum, 

 and, on the disk, bears three usually smooth tubercles. The 

 elytra are more thickly pubescent than in sociuSf and the 

 antennaj are in both sexes shorter than the body. 



Pachydissus, Newm. 



Some of the species previously included in this genus I 

 have placed in ^ohsthes, some 1 have removed to Plocederus. 

 Those that remain form a heterogeneous collection, which 

 may for the sake of convenience be arranged in sections. 

 These sections are so distinct as to be almost equivalent to 

 genera, and names will therefore be proposed for them. The 

 antennae of the male are in no case longer than twice the 

 length of the body, and are usually much shorter than this ; 

 the joints are never spined at their outer apex; the third and 

 iburth joints are usually, though sometimes very feebly, 

 ihickened at the apex. The pubescence is usually somewhat 

 silky, sometimes with feeble moire reflexions on the elytra. 

 The head is nearly always grooved between the upper lobes 

 of the eyes, though the groove is in many eases very shallow. 

 The eyes vary in the extent to which they are produced in 

 front. The head generally carries underneath one or more 

 transverse grooves, in addition to a postocular sulcate con- 

 striction. 



In the following synopsis the references to the antennae are 



I 



