ILLUSTRATIONS. 
PLATES. 
Page. 
Plate I. The timothy stem-borer ( Mordellistena ustulata): Larvae and pupa 
in stems 8 
II. Fig. 1. — Corn plant injured by the adult of the maize billbug 
(Sphenophorus maidis) ; afterwards attacked by the larva. Fig. 2. — 
Corn plant showing on stalk the effects of feeding by adult maize 
billbugs; effects of feeding by larvae on roots. Fig. 3. — Corn plant, 
much distorted, showing suckers; final effects of feeding of adult 
maize billbug 18 
III. Corn plants showing effects of feeding of adult maize billbugs in the 
field ; plant at left not attacked ; the two at right attacked by larvae . 18 
IV. Ravages of the chinch bug (Blissus leucopterus). Fig. 1. — Corn plant 
killed by chinch bug. Fig. 2. — Chinch-bug ravages in cornfield in 
southern Kansas, 1910. Fig. 3. — Cornfield adjoining wheat field 
from which chinch bugs migrated in immense numbers at harvest 
time 24 
V. Hibernation of the chinch bug. Fig. 1. — Pile of sorghum canes in 
which no hibernating chinch bugs could be found. Fig. 2. — 
Waste land along stream in foreground, sedge-grass meadow in 
background; chinch bugs found hibernating in both. Fig. 3. — 
Clumps of red sedge grass (Andropogon scoparius) in which over 
6,000 chinch bugs were found hibernating during winter of 1 909-10 . 36 
VI. The portion of the Shannonhouse cornfield, Hertford, N. C, on 
which corn was grown in 1910, totally destroyed by the "curlew 
bug, ' ' Sphenophorus callosus, in 1911 60 
VII. The portion of the Shannonhouse cornfield that was devoted to 
cotton in 1910; planted to corn in 1911 and uninjured by the "cur- 
lew bug " 60 
VIII. The dividing line in the Shannonhouse cornfield in 1911 between 
the portion (to the left of the man standing in the center) devoted 
to cotton in 1910 and the portion (to the right) where corn was 
grown in 1910 60 
IX. Fig. 1. — View of cornfield near Appleton, Tenn., showing damage by 
the "curlew bug." Fig. 2. — Corn plants, showing normal plant 
and those damaged by the "curlew bug " 68 
X. Experimental plats used in investigations of the legume pod moth 
during the season of 1911 100 
XI. The alfalfa looper and its parasites. Fig. 1. — Cocoon cluster of 
Apanteles hyslopi. Fig. 2. — Cocoon of alfalfa looper (Autographa 
gamma calif ornica) . Fig. 3. — Larva of alfalfa looper with cocoon of 
Microplitis alaskensis. Fig. 4. — Pupa of alfalfa looper. Fig. 5. — 
Adult alfalfa looper. Fig. 6. — Adult alfalfa looper at rest 112 
IX 
