PLATE CXCVII. 4I 



a winged creature. The larva, when full grown, is about an 

 inch and a quarter in length, and as thick as a goofe quill. It is a 

 heavy fluggifh creature, almoft cylindrical, the head very fmall, and 

 the whole of an uniform pellucid yellowifli 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 chara&er in the 

 perfect Sirex. In the pupa the form of the winged creature is more 

 viable than in the larva Hate ; it is of a browner colour than the 

 larva, and the rudiment of the fling and legs are very vifible. 



In the early editions of the Syftema Naturae of Linnseus, the 

 Sirices are arranged with the ichneumons in one genus ; but later 

 obfervations induced Linnaeus to make two genera of them in his 

 laft works. Geoffrey and SchaefFer have added fome particulars to 

 the Linnaean generic character ; thefe principally relate to the number 

 of joints in the tarfi. 



PL ATE 



