122 



CEBAMBYCID-E. 



but rather dense tawny-grey pubescence, which on the upperside, 

 as well as on the underside of the body, almost completely covers 

 the derm ; prothorax blackish at the front and hind margins ; elytra 



more or less black along the 

 sutural and lateral edges ; 

 antennae ferruginous, with 

 the intermediate joints 

 usually tipped with black 

 at the apex. Antennae of 

 c? much longer than the 

 body ; first joint stout, 

 rugulose-punctate ; the re- 

 maining joints very finely 

 granulate, fifth to tenth 

 acutely angulate in front 

 at the apex ; antennas of 

 $ scarcely longer than 

 the body, not granulate ; 

 joints fifth to tenth acutely 

 angulate at the apex. Pro- 

 thorax armed with a strong, 

 sharp, slightly recurved 

 spine on each side; strongly 

 corrugate above, the ridges 

 sometimes very irregular, 

 'sometimes more or less 

 transverse and wavy. Ely- 

 tra very finely and closelv 

 punctulate all over, but 

 with the punctures hardly 

 visible owing to the cover- 

 ing of pubescence ; the 



truncate apices shortly spined at each of the angles. 

 Length 27-45 ; breadth 9-15 mm. 



Hob. Northern India : Sikkim; Calcutta; Assam; Burma; Siam; 

 Andaman Islands. Eecorded also from Ceylon, but this record 

 requires confirmation. 



This species, wrongly identified as P. pedestris, White, is noticed 

 in 'Indian Museum Notes ' (vol. i, no. 2, p. 91) as being injurious 

 to Sal (Shorea robust a) and Jingham (Odina wodier), and is, no doubt, 

 as stated in the ' Notes,' the insect referred to in the following 

 extract from Mr. E. Thompson's ' Report on Insects injurious to 

 Woods and Forests ' (1867) p. 415 : 



" A third Monochamus beetle was found under circumstances of 

 extraordinary development. The pupae were discovered in solid 

 cocoons, made of a substance resembling lime. The shell was 

 fully the sixteenth of an inch in thickness, quite hard and firm, 

 offering in fact more resistance to the pressure of the fingers 

 than would a pigeon's egg. They were discovered beneath the 



Fig. 47. 

 Ploc&derus obesus, Gahan, 



X f . 



