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SCHOOL ENTOMOLOGY 



ally and have very long, thread-like ovipositors. The 

 larger forms parasitize caterpillars and other larvae and pupae. 



One, possibly the most 

 remarkable form in 

 the group, has an ovi- 

 positor several inches 

 in length with which 

 it bores through solid 

 wood to deposit its 

 eggs in the galleries 

 of the horn tail-larvae 

 (page 154), which it 

 parasitizes and kills. 

 Members of the fam- 

 ily Braconidce may 

 attack caterpillars 

 and, when full grown, 

 form small silken co- 

 the outside 



coons on 



of the body of the 

 host. Others in the 

 same family pupate 

 within the host. One 

 sub-family confines its 

 attention almost ex- 

 clusively to the plant- 

 lice and scarcely a spe- 

 cies of these insects 



has not one or more parasites belonging to this sub-family. 

 In the super-family Proctrypoidea, we find the smallest 



of the parasites and among the smallest of insects. Here 



are found the egg parasites and some of numerous parasites 



of the scale insects. 



FIG. 115. Parasitic Hymenop'.era. Note 

 parasitized cocoon and mass of pupae. 

 Reduced about one-half. 



