79 



641. PLUM CURCULIO. 



Conotrachelu8 nenuphar. 



A twig of cherry with ripening fruit is shown, illustrating the effect 

 of punctures by the female Curculio. 



642. PLUM CURCULIO. 



Conotrachelus nenuphar. 

 A branch of peach with ripening fruit is shown, illustrating the 

 effect of punctures by the female curculio. 



643. PLUM CURCULIO. 



Conotrachelus nenuphar. 



Twigs of plum with green and ripening fruit, illustrating the effects 

 of the egg punctures of the female Curculio. (See No. 55.) 



644. HESSIAN FLY. 



Cecidomyia destructor. 



Model in wax representing a healthy, unaffected young wheat plant 

 is exhibited to contrast with the same attacked by the Hessian Fly. 



645. HESSIAN FLY. 



Cecidomyia destructor. 



A model in wax is exhibited, illustrating the effects of the attacks of 

 the Hessian Fly. 



646. CLOVER PLANT. 



Trifolium pratense. 



A model in wax of a bunch of clover in vigorous growth is shown, 

 with some of the injuries to the foliage illustrated and certain of the 

 commoner insects frequenting or affecting it disposed on the flowers 

 and stems. For full exhibit of the principal insect enemies of the 

 clover see regular economic series. (See Nos. 409-475.) 



647. STRAWBERRY FALSE-WORM. 



Tenthredinida?, 

 Saw-flies. 

 A model of the strawberry plant in flower and fruit is shown, illus- 

 trating the work of two saw-flies, Monostegia ignota and Jfarpiphorus 

 maculatusj the larvae of which, known as false worms, attack the Leaves, 

 filling them with numerous small, irregular holes. (See No. 95 and 90.) 



648. ORANGE RUST-MITE. 

 Phytoptus sp. 

 Wax models of oranges, showing work of the Orange Bast-Mite. 

 (See No. 56.) 



649. GRAPE-VINE TRUMPET-GALL. 



Cecidomyia viticola. 



Model in wax of the abnormal growths caused by sting of a minute 

 Dipterous insect not infrequently observed on the leaves of the Grape. 

 (See No. 171.) 



