BIBLIOGRAPHY OF THE MORE IMPORTANT CONTRIBUTIONS TO 
AMERICAN ECONOMIC ENTOMOLOGY. 
PART II. 
386. [Walsh, B. D., and C. Y. Riley.] Salutatory. To the agricult¬ 
urists and horticulturists of the United States. <Amer. Ent., 
September, 1868, v. 1, pp. 1-3. 
Importance and extent of the ravages of insects ; practicability of the dimi¬ 
nution of these ravages; value of entomological work ; aims of the Atneri- 
. can Entomologist. 
387. [Walsh, B. D., and C. V. Riley.] Hogs vs. bugs. <Amer. Ent., 
September, 1868, v. 1, pp. 3-6. 
Effectiveness of swine as a means against Conotrachelus nenuphar and Carpo. 
capsa pomonella ; quotations showing good results from pasturing swine in 
fruit orchards. 
388. [Walsh, B. D., and C. Y. Riley.] Insect changes. <Amer. 
Ent., September, 1868, v. 1, p. 6. 
Definition of the different stages of insect transformation. 
389. [Walsh, B. D., and C. Y. Riley.] A new bark-louse on the 
osage orange. <Amer. Ent., September, 1868, v. 1, p. 14, fig. 8. 
Seasons, food-plants, characters, and figures of Lecanium maclurce n. sp., 
[= Pulvinaria innumerabilis ] and of L. acericola n. sp. [= P. innumerabilis ]; 
characters and economic importance of the genus Aspidiotus. 
390. [Walsh, B. D., and C. Y. Riley.] Entomological ignorance in 
the South. <Amer. Ent., September, 1868, v. 1, pp. 14-16. 
Reprint and criticism of article, “ How to destroy the cotton-worm—a sug¬ 
gestion.” 
391. [Walsh, B. P., and C. Y. Riley.] Grasshoppers. <Amer. Ent., 
September, 1868, v. 1, p. 16. 
Ravages of Acrididce in Illinois, Iowa, and Missouri; mention of the species 
committing these ravages; means against the same. 
392. [Walsh, B. D., and 0. Y. Riley.] The old and the new philoso¬ 
phy. <Amer. Ent., September, 186S, v. 1, p. 17. 
Defense of the practical application of science. 
393. [Walsh, B. D., and 0. Y. Riley.] The animal kingdom. -\Amer. 
Ent., September, 1868, v. 1, pp. 17-18. 
Definition of the “ four grand branches of the animal kiugdom; ” mention 
of their respective classes. 
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