THE CONCHUELA. 
29 
LIFE HISTORY. 
Mkthods of Study. 
Studies in the life history of this and other species of plant-bugs 
were conducted in an improvised laboratory at Tlahualilo, Durango, 
Mexico, during July, 1905, and at the boll weevil laboratory at Dallas, 
Tex., after August 5, 1905. The insects were confined in lantern 
chimneys covered at the top with cheese cloth held in place by 
rubber bands, the number of adults to a cage ranging from one to 
five. The adults were provided daily with freshly picked green 
cotton bolls until about October 1, after which fresh bolls were 
supplied every two 
days as long as any 
were available. 
Nymphs were fed 
upon fresh green 
cotton leaves or 
twigs, cotton bolls 
cut or broken in 
two. and imma- 
ture cotton seed 
from which the lint 
was first removed. 
R e c o r d s w e r e 
made at least once 
each day. noting 
deaths, eggs de- 
posited, time o( 
examination, etc. 
During the writer's 
occasional absences from the laboratory on Held work these records 
were made by Mr. W. W. Yothers and Mr. A. 0. Morgan. 
Fig. 6.— The conehuela: Nymph, fifth instar. Enlarged 6 diameters. 
(Original.) 
Adults. 
PERIOD BETWEEN MATURITY OF ADULTS AND BEGINNING OF EGG-LAYING. 
The data at hand on the length of time elapsing from the maturity 
of the adults to the beginning o( oviposit ion are not sufficiently 
extensive to permit the drawing of conclusions. Apparently the 
specimens upon which the data are based were influenced by the lab- 
oratory conditions, for the period varied in length from 23 to 95 days 
and averaged 45 days in the case o^ the five specimens which were 
reared to maturity in the laboratory during duly and August and 
which deposited one or more batches of eggs. Three females in addi- 
