Prats I. 
II. 
TE. 
EV. 
VIE. 
VIE. 
WATE 
POS (tex TONS 
PLATES. 
The timothy stem-borer ( Mordellistena ustulata): Larvee and pupa 
IAS UCHR See =e, eI Treo «ei WSL ate Neel pI a ohh 
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 larve on roots. Fig. 3.—Corn plant, 
much distorted, showing suckers; final effects of feeding of adult 
ULES os ELE ee eee ea oe oe iowa oo aod amie ts ses Se 
Corn plants showing effects of feeding of adult maize billbugs in the 
field; plant at left not attacked; the two at right attacked by larve . 
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 
. 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 1909-10. 
The portion of the Shannonhouse cornfield, Hertford, N. C., on 
which corn was grown in 1910, totally destroyed o the ‘‘curlew 
bus As prenopnuris colosus, Wi LOWE oo asec sac dc cee aes 
The portion of the Shannonhouse cornfield that was devoted to 
cotton in 1910; planted to corn in 1911 and uninjured by the ‘‘cur- 
HERS Li ae ot la Sel AR, ee ahh Jb a ee ee ee eee 
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 
Eromay ett rites sas ese ec ore Stes os ra crear te nase Mea Cenc ae 
. 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’”’..................-.-4-- 
. Experimental plats used in investigations of the legume pod moth 
Savitietire MeasGte Olt oo ons 23's Seon cae eo oeiae ec en hie as che 
. The alfalfa looper and its parasites. Fig. 1.—Cocoon cluster of 
Apanteles hyslopi. Fig. 2.—Cocoon of alialia looper (Autographa 
gamma californica). 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........ 
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