MAINE AGRICULTURAL EXPERIMENT STATION. 



A very small larva which lives in small rounded "shot holes" 

 about 1-16 inch in diameter. Adults are small brown 

 beetles. Shot-borer beetle. Page 8. 



Scale insects and plantlice. 



Scale about 1-10 inch long on twigs; shaped like oyster 

 shell, (fig. 3). Oyster-shell scale. Page 9. 



A small circular scale with exuvial spot dark and central, 

 (fig. 4). San Jose scale. Page 10. 



A small circular grayish scale with exuvial spot a little to 

 one side of the center. 



European Fruit-tree scale. Page 12. 



An elongate scale dirty white in color. Scurfy scale. Page 12. 



A brownish oval scale about the size of half a pea. 



European Fruit Lecanium. Page 12. 



Plantlice with white downy secretion ; cause wart-like swell- 

 ings on roots, and also are found on the twigs, (figs. 

 34. 35)- Woolly aphid. Page 13. 



a. BORERS IN THE WOOD. 



Round-Headed Apple-Tree Borer. 



{Saperda Candida Fab.) 



« b 



Fig. 1; a, larva; b, pupa; c, adult. (After Riley). 



The first intimation that the grower usually has of the pres- 

 ence of this borer in his trees is in their retarded growth and 

 the sawdust-like castings, consisting of excrement and gnawings 

 of woody fiber, which the larvse extrude from the openings into 

 their burrows. This manifestation is usually accompanied by 

 more or less evident discoloration of the bark and, in early 

 spring particularly, by slight exudation of sap. 



The parent of this borer is a beautiful beetle, measuring from 

 three-fourths to nearly an inch in length, the male being per- 

 ceptibly narrower than the female. The legs are gray, the 



