of the Oroup Cerambycina3. 259 



spine. The elytra are finely and closely punctured, the 

 punctures on the basal part running together to form a fine 

 rugosity. In P. pedestris the elytra, as well as the body, are 

 black, with a very delicate greyish pubescence ; the legs and 

 antenna are rufous ; the elytra are very closely punctulate up 

 to the apex. P. humeralis is wholly reddish ferruginous, 

 with the exception of the shoulders of the elytra, which are 

 fuscous ; it is clothed with a very delicate gxQj pubescence ; 

 the elytra are closely punctulate as far as the apex. P. con- 

 sociiis is of a somewhat dull ferruginous colour, with the 

 lateral borders of the elytra somewhat fuscous ; the punctu- 

 lation of the elytra towards the apex is sparser and more 

 minute than in the two preceding, and the apex of the elytra 

 is more distinctly quadrispinose. These differences are 

 perhaps little more than varietal. There are indeed in the 

 British Museum collection two specimens from Southern 

 India which seem to be intermediate in characters between 

 the North-Indian humeralis and the Ceylonese corisocius. 



Plocederus ohesus. 

 Phcederus obesiis, Galaan, Ann. & Mag. Nat. Hist. ser. 6, vol. v. p. 51. 



Since describing this species I find that one completely 

 resembling it had a short time before been figured in the 

 ' Indian Museum Notes ' (vol. i. no. 2, pi. v. fig, 4 a and h) 

 as the Plocederus pedestris of White. The latter species it 

 cannot possibly be, and I am only in doubt whether the 

 species figured is my ohesus or the ferrugineus of Linngeus. 

 Judging from the figure and the localities given I should 

 say it is the former. The insect is stated to be injurious to 

 timber-trees, and at page 91 of the 'Notes' some account of 

 the habits of the larva is given. For the advantage of ento- 

 mologists in India, and so that a correct determination of the 

 species in question may be possible, I will supplement my 

 short description of Plocederus ohesus^ and point out how it 

 difters from P. pedestris. 



Length 27-45 millim., or from about 1-lf inch ; width 

 9-15 millim. 



Clothed with a short but rather dense fulvous-grey pubes- 

 cence almost concealing the derm beneath it ; the latter where 

 rubbed is seen to be of a reddish chestnut or testaceous colour. 

 The antennge in the male are much longer than the body, ferru- 

 ginous, with the intermediate joints usually tipped with black 

 at the apex, with the scape finely rugose-punctate, with the 

 remaining joints up to the tenth very minutely granulate, and 

 with the fifth to tenth joints denticulately produced at their 



