BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
47 
373. Walsh, B. D.—Continued. 
Chapter 7. The rascal leaf-crumpler. Phyeita nebulo Walsh [= Acro- 
basis in digin ella ]. 
A peculiarly Northwestern species, not found either East or South— 
Easily destroyed. 34 
Chapter 8. The oyster-shell bark-louse. Aspidiotus conchiformis Gruel. 
[= Mytilaspi^pomorum']. 
Its history—Loses almost all its organs when only a few days old, 
and becomes thenceforth as stationary as a cabbage—How it 
spreads from tree to tree—Mites and their natural history—Plant- 
feeding mites, parasitic mites, and cannibal mites—The bark- 
louse largely preyed on by a minute cannibal mite—Useless and 
useful remedies .. 34 
Chapter 9. Harris’ bark-louse. Aspidiotus harrmi Walsh [=C7ii- 
onaspis furfur us ]. 
How it differs from the preceding—The geographical distribution. 53 
Chapter 10. The apple-root plant-louse. Pemphigus pyri Fitch 
[= Schizoneura lanigera']. 
Often confounded in Illinois with the true “Woolly plant-louse”— 
The differences—Its history— Causes a form of “rotten-root”— 
Its supposed cannibal foes—Remedies. 55 
Chapter 11. The plum Curculio. Conotrachelus nenuphar Herbst. 
Its history—Its peculiar crescent cut explained—Double-brooded— 
Its supposed enemies, the so-called “Curculio parasite” and the 
Baltimore oriole—Remedies. 64 
Chapter 12. The plum-gouger. Anthonomusprunicula Walsh [= Coc- 
cotorus 8cuteUaris~\. 
Bores a round hole in the plum, instead of a crescent cut—How 
and why it does this—Differs in many other respects from the 
Curculio.-. 72 
Chapter 13. The plum-moth. Semasia [= Grapholitlia] prunivora 
Walsh. 
Its history—Probably a guest-moth, and therefore not injurious.. 78 
Chapter 14. The hateful grasshopper. Caloptenus spretus Walsh. 
The Rocky Mountains its uatural home — Invades in certain years 
certain neighboring districts, such as Texas, Missouri, Kansas, 
Nebraska, and Iowa—Lays there millions of eggs, which develop 
into barren grasshoppers only — Invasion of 1866—Damage done 
by the young grasshoppers in the spring of 1867 — In Kansas 
about one-eighth of the field crops and seven-eighths of the gar¬ 
den crops destroyed by them—Grashopper invasions of A. D. 
1820, 1856, 1857, 1864, and 1867—Probable results in 1868 of 
the invasion of 1867—Has never yet come within 115 miles of 
Illinois—Can not spread into Illinois as the Colorado potato-bug 
has done—Reasons why, in all human probability, it can never 
reach Illinois at all. 82 
374. Walsh, B. D. friend unmasked. <Amer. Ent., November, 
1868, v. 1, pp. 51-52, fig. 55. 
Description and figures of larva and adult of Chauliognathus pennsylvanicus ; 
character’s and habits of the Telephorklce , 
