JRARY 



OF ECONOMIC ENTOMOLOGY. 47 



373. WAL~SH, B. D. Continued. 



CHAPTER 7. The rascal leaf-crumpler. Phyoita nebula Walsh [= Aero- 

 basis indiginella']. 



A peculiarly Northwestern species, not found either East or South 

 Easily destroyed 34 



CHAPTER 8. The oyster-shell bark-louse. Aspidiotus conchifonnis Gmel. 



[= Mytilaspis 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. Attpidiotus harrisii Walsh [=Cfri- 



on aspis furfurus ] . 

 How it differs from the preceding The geographical distribution. 53 



CHAPTER 10. The apple-root plant-louse. Pemphigus pyri Fitch' 



[= ScMzoneura 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. Anthonomus pruntcida Walsh [=(700- 



cotorus ncuteUari8~\. 



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 [= GrapJiolitha'} prnnlvora 



Walsh. 

 Its history Probably a guest-moth, and therefore not injurious.. 78 



CHAPTER 14. The hateful grasshopper. Caloptenus spretus Walsh. 



The Rocky Mountains its natural 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 1 - 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. A friend unmasked. <Amer. Ent., November, 



1868, v. 1, pp. 51-52, -fig. 55. 



Description and figures of larva and adult of Chauliognathus pennsylvanicus ; 

 characters and habits of the Telephoridw, 



