48 TROCHILIUM CYNIPIFORME. 



The larva was about seven-eighths of an inch in 

 length ; it had the head flattened and smaller than the 

 second segment ; the body was cylindrical, but taper- 

 ing a little posteriorly, especially the anal segment ; it 

 was somewhat plump, with the segmental folds rather 

 deeply incised. The colour of the body was a rather 

 opaque yellowish flesh colour, with a faint indication 

 of a dorsal vessel showing through on the last four 

 segments. 



The head was dark purplish-brown, with the mouth 

 blackish, above which in the middle was a flesh- 

 coloured spot. There was a shining brown plate on the 

 second segment, and a pale yellowish-brown one on 

 the flap of the anal segment ; the tubercles were very 

 minute, each bearing a short brown bristle ; the spira- 

 cles were also exceedingly small, being dark brown 

 ovals with flesh-coloured centres. 



A further supply came from Dr. Chapman, Novem- 

 ber 10th to 21st. The perfect insects from the larvae 

 appeared June 29th to July 1st, 1869, viz. 2 <$ and 

 1 ?. 



The pupa of T. cynipiforme was about half an inch 

 in length, moderately slender, and tapering to the anal 

 extremity, with the abdominal segments rather deeply 

 divided, the tips of the wing-cases and antenna-cases 

 projecting a little from the body and sides. 



On the back of the abdominal segments were two 

 slightly raised ridges, distant from each other about 

 the width of a segmental division ; these ridges bear 

 small, short, sharp, recurved hooks pointing back- 

 wards ; on the three last segments these hooks were 

 rather larger and only in a single row ; the anal ex- 

 tremity was rounded at the very tip and had six short 

 spiky hooks encircling it. 



The pupa was brown, with the hooks blackish, the 

 entire surface very shining. It was enclosed in a slight 

 silken-lined cocoon formed of " frass " and the gnaw- 

 ings of the bark very slightly spun together. 



A short time before the perfect insects emerged 



