COLLECTING AND PRESERVING INSECTS BANKS. 



93 



With roared specimens it is often customary to mount the pupal skin 



on a bit of cardboard attached to the pin bearing the adult fly. 



The life histories of 



but few Diptera are 



known, and this is 



an inviting; field for 



investigations. 



Many horseflies 

 (fig. 143) can be col- 

 lected from, a herd 

 of cattle. With some 

 hairy flies, like Bom- 

 byliidse, it is better 

 to kill them with 

 chloroform, or pin 

 them in the net and 

 kill them later, for 

 they lose many of 

 their hairs in the 



OlClinai} cyanide Fl( , 143 _^ horsefly, Tabanus lasiophthalmus: a, Male; 6, 



bottle. male; c, pupa; d, tail of same; c, larva. 



HEMIPTERA-HETEROPTERA . 



The habits of the Hemiptera-IIeteroptera are in many ways similar 

 to those of the Coleoptera, and one who collects beetles will come 

 across a great variety of bugs. A number are 

 found on the ground, others in or on the water, 

 some on the bark and twigs of trees, many 

 species on the leaves of trees and shrubs, 

 under stones, among fallen leaves, and in moss. 

 A few are obtained by sweeping, and most of 

 them by looking in likely situations, and the 

 forceps and empty vial are the most useful 

 instruments. A number may be taken with 

 the umbrella net. Many <>f the aquatics, and 

 some of the Ileduviids (fig. 144), come to 

 light. Many species are restricted to one or a 

 few food plants, so that food-plant labels 

 should be pinned with the specimen. When 

 one takes a number of Tingitidse or Aradidae 

 it is well to mount a few specimens upside down, as the venter 

 is of importance in classification. Frequently it is accessary to 

 mount the wings and heads as dry mounts on slides for microscopic 

 study. 



Fig. 144.— A "kisslvg bug 

 Reduvtus personatus. 



