lX ANALYTICAL LIST OF THE ENTOMOLOGICAL WRIT¬ 
INGS OF WILLIAM LeBARON, M. D. 
SECOND STATE ENTOMOLOGIST OF ILLINOIS. 
1850. 
he Chinch Bug. (Prairie Farmer, Sept.. 1850. v. 10, pp. 280, 281: reprinted 
by Fitch in 2d Rep. Ins. IN. Y.R 
[See 16th Rep. State Ent. Ill., Appendix, p. 9.] 
1853. 
'bservations upon two Species of Insects Injurious to Fruit-trees. Prairie Farmer. 
Sept,, 1853, v. 13, p. 330: last part reprinted in 2d Ann. Rep. State Ent! 
Ill. [third of the series], p. 118.) 
Describes as Tcttigonia mail * a small green leaf-hopper which punctures 
ae veins of the under side of the leaf and causes it to curl down. It feeds 
ttle after reaching maturity, which occurs before the autumnal growth of 
ae trees. Not hitherto known to multiply sufficiently to do very serious 
ljury. Suggests as a remedy the immersion of the affected twigs in 
jme insecticide solution, such as quassia or whale-oil soap. Descriptive 
art as follows: “This little insect is about one eighth of an inch long, 
ellowish green, forehead and crown freckled with white: a series of white 
oots along the anterior margin of the prothorax: two white stripes on 
ae mesothorax united in the middle by a transverse stripe, like the let- 
?r H, a triangular white spot on the scutellum, with a smaller spot on 
ich side of it: sexual appendages, in both sexes, ciliated or bordered with 
fine fringe. The eyes are pearl-white in the living insect but become 
rownish after death. This species might be appropriately called the 
'ettigonia mail, or apple-tree leaf-hopper.” 
The second insect referred to is a leaf-rolling caterpillar [Acrohasis in- 
Iginella, Zell.], which passes the winter as a half-grown larva in an elon- 
ite, conical, twisted case, covered with dead leaves. It feeds on the 
irliest spring foliage, maturing about the end of June, pupating within 
s case, and emerging before the middle of July. Description of larva 
ad moth are given (without name). Capable of doing serious damage, 
lum-trees almost entirely covered by them were cleared by assiduously 
icking off and burning. Le Baron had seen the tree sparrow [SpizelJa 
onticola ] “busily tearing open the clusters of matted leaves, in search, 
o doubt, for the larva* concealed within them.” Neither this insect nor 
le leaf-hopper above mentioned were known to Dr. Harris. 
1854. 
he Bark Lice of the Apple-tree. (Prairie Farmer, June, 1854, v. 14. rm 
203-205.) 
Discriminates and describes two common species of bark lice [Aspidiotus 
mchiformis and Chionaspisfurfurens], the first, with pale eggs, the more com- 
*Ai ft 1 e iJ v ( ards describecl by S. A. Forbes as Empoa albopicta. (13th Rep. State Ent. Ill., 
), 181,182.) 
