PLATE CXCVIL At 
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The larva when full grown is about an inch and a quarter in length, 
and as thick as a goofe quill. It is aheavy fluggifh creature, almoft 
cylindrical, the head very {mall, and the whole of an uniform pellucid 
yellowifh colour. It has a fmall fpine at the end of the body like 
thofe by which the larva of fome fpinges are diftinguifhed: this 
fpine is alfo a ftriking character in the perfect Sirex. In the pupa 
the form of the winged creature is more vifible than in the larva 
{tate ; it is of a browner colour than the larva, and the rudiment of 
‘the fting and legs are very vifible. 
In the early editions of the Syftema Nature of Linnzus, the 
firices are arranged with the ichneumons in one genus; but later 
obfervations induced Linnzus to make two genera of them in hig 
laft works. Geoffroy and Scheffer have added fome particulars to 
the Linnzan generic character ; thefe principally relate to the num- 
ber of joints in the tarfi. 
PLATE 
