COLLECTION AND PRESERVATION OP INSECTS 



41 



Figure 39. 



-Diptera. The striped horsefly (Tabamis lineola (F. )). 

 about 15 mm. 



Actual length 



SIPHONAPTERA 



Siphonaptera (fleas) are small, wingless insects with the body later- 

 ally compressed ; the legs are comparatively long ; the body has numer- 

 ous short bristles directed backward. The mouth parts are formed 

 for piercing and sucking. The immature stages are wormlike, quite 

 different from the adults, and are found in the nests of various ani- 

 mals. The adults are well known as pests of domestic animals and 

 man; one species transmits bubonic plague, an important disease in 

 tropical countries. 



Figure 40. 



-Hymenoptera. The introduced pine sawfly (Diprion simile (Htg.)). 

 Male at left ; female at right. Actual length about 10 mm. 



