882 REPORT 4, UNITED STATES' ENTOMOLOGICAL COMMISSION. 
We collected all the bolls we could find containing Heliothids. At that time, Sep- 
tember 23, they were scarce. These, with numbers of Aletise, we showered with a 
wood-spirit extract of Pyrethrum diluted with water at the rate of thirty to one. The 
Aletiss fell off the leaves and died in less than ten minutes. In about that time the 
Heliothids backed out of their holes and crawled about uneasily. In fire minutes they, 
too, fell to the ground. 
Doubtless it is by creating in this way an atmosphere deadly to them they were 
forced to leave their retreats and get upon the wet and fatal leaves. When fields can 
be sprinkled instead of only a few feet, probably a still weaker infusion will prove 
effectual. With this extract, then, it becomes only a question of cost to deal with the 
Boll Worm. 
For a full discussion of Pyrethrum, its cultivation and its compounds, 
see Chapter X. 
BIBLIOGRAPHY. 
In this list we include simply the titles of those articles consulted in 
the preparation of this short account of the Boll Worm. It will, how- 
ever, be found to contaiu all the more important articles which have 
been written on the subject in this country. 
American Entomologist.— " The Tomato Fruit Worm." Vol. ii, p. 172. 
[An account of an exhibition before the London Entomological Society of Heliothis reared 
from tomatoes by J. Jenner Weir.] 
Anon.— Southern Planter. 1842. 
[Advises rotation of corn with cotton as a remedy for the Boll Worm.] 
Boddie, J. W. — American Cotton Planter. July (f ), 1850. 
[Describes the moth scientifically as Phalena zea, and states that the first brood is to be 
found on corn and the second on cotton. Also describes the eggs of what is evidently a Tach- 
inid on the larva. Advises as a remedy to plant no corn.] 
Beimpr. — Turner's Cotton Planter's Manual. N. Y., 1857. 
Boisduval, J. B. A. D. — Genera et Index Methodicus Europeorum Lepidopterum. 
Paris, 1840, p. 1308. 
Bond, W. J. (?)— Proc. Lond. Ent. Soc. March 1, 1869. 
[Exhibited specimens of S. armigera from different parts of the world.] 
Brown, D. J. — " Investigations of the Insects and Diseases affecting the Cotton 
Plant." Department of Agriculture Report, 1857, p. 121. 
[In the course of this article, which was published over Glover's name, but disowned by 
him in his 1878 MS. Notes, Cotton, a short account of the Corn Worm is given on p. 123.] 
Claypole, E. W. — " Heliothis armigera Feeding on hard Corn." American Ento- 
mologist, iii, 278, Nov., 1880. 
Comstock, J. H. — "The Boll Worm." Report on Cotton Insects, Washington, 1879, 
pp. 287-315. 
The same condensed in Ann. Rept. Dept. Agr., 1879, pp. 332-347. 
[Full account, giving results of investigations made under direction of C. V. Riley in 1878.] 
Duponchel.— Histoire Naturelle d. Lepidopteres de Frauce, iv, p. 316, pi. 119, figs. 5,6. 
Fallou, M. J. — Insectologie Agricole, 1869, p. 205. 
[Heliothis armigera recorded as feeding on Chick Pea.] 
French, G. H. — " Corn Worm or Boll Worm." Seventh Illinois State Entomological 
Report, p. 102. 1877. 
French, G. H.— Ibid, pp. 231-233. 
French, G. H. — "Corn Worm." Prairie Farmer, October 26, 1878. 
[Experiments with freezing the pupa).] 
