REPORT OF THE STATE ENTOMOLOGIST I9OO IO47 



EXPLANATION OF PLATES 



PLATE i« 



Gipsy moth 



PORTHETRIA DISPAR Linn. 



FIG. 



1 Female with wings expanded 



2 Female in resting position 



3 Male with wings expanded 



4 Male in resting position 



5 Pupa 



6 Dorsal view of one of the larger caterpillars, presumably a female 



7 Dorsal view of one of the smaller full-grown caterpillars, presumably 



a male 



8 Egg cluster on a piece of bark 



9 A few eggs greatly enlarged 

 10 One egg still more enlarged 



PLATE 2& 



Palmer worm 



Ypsolophus pometellus Harris 



FIG. 



1 Full-grown larva, much enlarged 



2 Pupa, much enlarged 



3 Typical form of moth enlarged 



4 Form of moth described asY. contubernalellus 



5 Apple twig showing skeletonized and dried leaves and the irregular 



holes eaten in the fruit 



6 Pupa natural size 



7 A parasite, Dioctes (Limneria) salicicola Ashm. 



8 Cocoon of same 



PLATE 3 



Diagram of experimental orchard, showing location of trees, their size, 

 variety and degree of infestation. 



plate 4 



A very badly infested Howell peartree after it had been treated with 

 undiluted kerosene, two views. 



plate 5 



Shows the harmlessness of 20% kerosene emulsion, both trees are in 

 full bloom. 



a Reproduced through the courtesy of the secretary of the Massachusetts state board of agri- 

 culture, 

 b Executed from nature, under the author's direction, by L. H. Joutel. 



