THE MONTHLY BULLETIN. 



241 



Food Plants. — The beetles confine their attacks almost wholly to 

 the wild rose, though they may occasionally work great damage to 

 cultivated roses and to berries. The adults also feed upon oak leaves 

 and grapevines. 



Control. — As this pest is normally a leaf eater it may be controlled 



Fig. 238. — The rose snout beetle {Rhyn- 

 chites Mcolor Fab.). The two left indi- 

 viduals are females ; the right, a male. All 

 slightly enlarged. (Original.) 



by liberal applications of arsenical sprays. These meet all require- 

 ments, except where they damage the fruit of berries, but even such 

 attacks could have been prevented by spraying the vines before the 

 berries began to ripen. 



DIPTERA (Order). 



TWO-WINGED INSECTS. 



TRUE FLIES. 



This order probably comprises more numbers than any other and is 

 one of vast importance to health as well as to agriculture. Most of the 

 members are injurious, though certain ones, due to their predaceous 

 and parasitic habits in the subjection of other injurious insects are 

 beneficial, but these are of little consequence in consideration of the 

 great numbers of their pestiferous relatives. 



The members of this order are particularly characterized by having 

 only two wings, if wings are present at all. The male coecids and a 

 few May flies are the only other insects being thus characterized. 



All have complete metamorphosis, the larvse being legless and headless 

 maggots and the pupa with free limbs or enclosed in a skin. In either 

 case the latter are known as puparia. The mouth parts are for lapping 

 and piercing and sucking. 



The life histories and habits of flies vary considerably. Most species 

 lay eggs while a few give birth to living larvae, and still others bring 

 forth young developed to the puparia stage, the latter being usually 

 parasitic. The maggots feed upon plant tissue, fruits and flesh, and are 



