DESCRIPTION OF PLATES. 



PLATE I. Beneficial Insects. See p. 107. 



Fig I. — Pimpla inquisitor, an ichneumon parasite of the tussock moth 

 caterpillar, a, parasitized caterpillar; b, egg of parasite; c, same in situ; 

 d, parasite larvae issuing; e, parasite cocoons — all slightly enlarged, 

 except b and c, which are much enlarged. (After Howard. Farmer's 

 Bulletin gg, U. S. Dept. Agr.) 



Figs. 2 and 3. — Ichneumons, parasitic upon apple tree tent caterpillar. 



Fig. 4. — Ichneumon parasitic upon flat-headed apple tree borer. 



Fig. 5. — The 15-spotted lady bird, destructive to plant lice, a, larva; 

 b, chrysalis ; d, e, f, g, various forms of the perfect insect. 



Fig. 6. — The twice-stabbed lady bird, destructive to the oyster-shell 

 bark louse. 



Fig. 7. — Tachina fly, parasitic on apple tree tent caterpillar. 



PLATE II. 



Fig. I. — Round-headed borer (Saperda Candida). See page 108. 

 a, larva ; b, pupa ; c, beetle. 



Fig. 2. — Flat-headed borer (Chrysobothris femorata). See page 109. 

 a, larva; b, pupa; c, head of larva, under side; d, beetle. 



Fig. 3. — Woolly louse. (Schisoneura lanigera). See page 113. a, 

 excrescence upon the root ; b, the lice at work ; c, a louse much mag- 

 nified. 



Fig. 4 — Pear-blight beetle or shot-borer (Xyleborus pyri). See page 

 112. 



Fig. 5. — Work of the pear-blight beetle. 



(Figs 4 and 5 after Howard). 



PLATE III. 



Fig. I. — Oj^ster-shell bark louse {Mytilaspis pomorum) . See page no. 

 a, egg; b, female louse; c, d, e, f, stages in the life history; g, under side 

 of female scale, — all much magnified. 



Fig. 2. — Oj^ster-shell bark louse. Scales in place upon the bark. 



Fig. 3. — Lesser apple leaf folder, (Teras tninuta). See page 117. a, 

 larva; b, pupa; c, moth; d, case made on apple leaf. (After Smith). 



Figs 4 and 5. — Oblique-banded leaf roller (Caca:cia rosana). See page 

 116. 



Fig. 6. — Bud moth {Tmetocera ocellana). See page 114. (Cornell 

 Expt. Sta., Bulletin 50). 



