THE CONCH [TELA. 43 
the limits of the alfalfa field. The fourth-instar nymphs were found 
in abundance on fence posts, tree trunks, rot ton plants, and weed- 
within 10 yards of the alfalfa field where they originated, and were 
scarce from 10 to 20 }~ards from this field. Nymphs in the fifth instar 
invaded a cotton field up to about 30 yards, in numbers estimated to 
average between ten and fifteen per plant; from 30 to 40 yard-. 
between five and ten per plant; and from 40 to 60 yards, between 
two and five per plant. Few, if any, attained a distance of more than 
60 yards from the point of origin. In these estimates due allowance 
has been made for the nymphs which occurred in the field before the 
beginning of the migration. These records do not show the maximum 
distance which the nymphs are capable of crawling, for the new food 
supply immediately adjoined the field of original infestation. It 
is certain, however, that this distance is over 60 yards. 
Adults, 
fertilization". 
Laboratory observations show that males of the conchuela are 
polygamous and females polyandric. During copulation in the cot- 
ton fields, both insects are usually engaged in feeding on a boll or 
other part of the plant. Xo attempt has been made to ascertain how 
long a pair of the insects remain in coitu, but in 2 instances a note 
was made of more than one-half hour or more than 2 hours, respec- 
tively. With other species of Pentatomid bugs, pairs have been 
observed in coition for a period of several hours at a time. 
EGG LATINO. 
Place of deposition. — Eggs are deposited in batches or clusters 
wherever the female happens to be feeding or resting. On cotton they 
have been found on both upper and lower surfaces of the leaf, though 
more commonly on the latter, also on bracts of bolls and on stems. 
In a cotton field at Llano, Tex., in September. 1905, a female con- 
chuela was observed depositing a batch of eggs on lint in an open boll. 
On grape, 11 batches of eggs collected on July 12 were deposited as 
follows: 8 on underside of the leaves, 1 on the upper surface of the 
leaf, and 2 on the tendrils. Of 9 egg-batches collected on July 17, 
I were on the underside and 3 on the tipper surface of alfalfa leaves 
and 5 on the underside of a solanaceous weed, the "tronipillo" o( the 
natives of Mexico. At Barstow. Tex., eggs o( the conchuela with 
eggs of another Pentatomid which will he referred to later — Penia- 
totna gayi St a! — were frequently found on the seed-clusters o( alfalfa, 
a favorite feeding place. In captivity the females c^ the conchuela. 
as well as other cotton-feeding Pentatomids, deposit eggs usually on 
the cotton bolls supplied for food, but occasionally on paper at the 
bottom of the cage and on the cheese-cloth cover at the top. 
