80 



The Stems and Leaves — 



(a) Young plants cut off near surface of ground — Cutworms. 



(b) Stalks and vines and leaves of cucumbers, etc., eaten, and base mined by 

 small white grubs — Cucumber Beetles (Diabrotica spp.). 





Fig. 3. — Diabrotica vittata : a. beetle ; b. larva; c. pupa: d. egg; e. sculpture of san»e — a.b.c. much enlarged; 

 more enlarged ; e. highly magnified. (After Chittenden.) 



(c) Leaves of cabbage, etc., ragged, eaten by pale green caterpillar — Cab- 

 bage Worm (Pontia rapae). 



(d) Vines of cucumber, etc., wilted and presence of large dark stink-bugs on 

 leaves — Squash Bug (Anasa tristis). 



(e) Leaves and vines of cucumber, etc., sickly and dirty, under-surfaces in- 

 fested with greenish black lice — iVIelors Plasii Louse (Aphis cucumeris). 



(f) Surface of leaves of cucumber, etc., eaten by small black beetles — 

 Cucumber Flea Beetle (Epitrix cucumeris). 



(g) Leaves of cabbage, etc., wilted down, and under surface covered with 

 greenish plant Hce — Cabbage Plant Louse (Aphis brassicae). 



INSECTS INJURIOUS TO APPLES. 



The Roots- 



1. Causing knots or swellings on the smaller roots, bluish-white mouldy 

 lice — Woolly Aphis (Schizoneura lanigera). 



The Trunk, Branches and Twigs — 



(a). Producing longitudinal slits in the bark; eggs under the edges of the 

 slits— Buffalo Tree-Hopper (Ceresa bubalus). 



