of the Group Cerambycina?. 259 



spine. The elytra arc iinoly 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 

 antennae 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 grey pubescence; 

 the elytra are closely ])unctulate as far as the apex. P. con- 

 socius 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 arc 

 ])erhaps 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 Geyloaese consocius. 



Plocederiis ohesus. 

 Plocederus ohesus, GaliaD, 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 Linna3us. 

 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 tliat 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 

 differs from P. jyedestris. 



Length 27-45 millim., or from about 1-1| 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 antenna? 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 tlie tenth very minutely granulate, and 

 with the fifth to tenth joints denticulately produced at their 



