COLLECTING INSECTS. 



25 



HYMENOPTERA. 



BEES, WASPS, ICHNEUMON FLIES, GALL FLIES AND SAW FLIES. 



These insects are exceedingly abundant, and especial atten- 

 tion should be paid to collecting the smaller species. They 

 should be pinned through „. „. 



1 » Fig. 2d. 



the thorax, high up on the 

 pin, and those that are not 

 hairy collected in alcohol. 

 The hairy species of bees 

 should be pinned while in 

 the net. The minute ichneu- 

 mon flies should be gummed 

 like small beetles upon 

 cards, or preserved in s mall 

 pill-boxes. The nests of 

 -bees, wasps and ants should 

 be sought for and the entire 

 colony with the young grubs 

 captured and placed in spir- 

 its, while especial attention ichneumon (Ophion.) 

 should be given to preserving the different sorts of parasites 

 found in the nest. The nests in various stages of construction 



Fie. 20. 



Chalcis. Saw Fly and Larva. 



should be collected to serve as illustrations of insect architec- 

 ture. 



The gall flies produce by their stings tumors or galls on the 

 leaves or twigs of dees. Specimens of these galls accom- 

 S. M. c. 261. 4 



