244 MAINE AGRICULTURAL EXPERIMENT STATION. I912. 



True sexual individuals: Born within an egg-like pellicle; the 

 antennse 5-jointecl, with the joints siihequal. Orange in color. 

 Undergoing one molt, and then being at once distinguished from 

 the other forms by the brighter orange-yellow color, the rudi- 

 mentary mouth, the more simple eyes (composed of three 

 facets), by the shorter, 5-jointed antennae, the joints subequal 

 in length, by the shorter legs, with smaller claws to the tarsi, 

 and more distinct terminal capitate hairs or pulvilli. The skin 

 is tra'nsparent, the body filled more or less with fatty globules. 

 The female is nearly pyriform, and averages 0.4 mm. in length. 

 A single egg is visible through the translucent skin and occupies 

 nearly the whole of the body. The male is narrower and 

 smaller. Figs. 446 and 447. 



This generation seems to have nO' object in life except the 

 deposition of eggs, since they can not eat or fly. The eggs are 

 placed in the deepest crevices of the bark, especially those that 

 are tangential to the tree, and are not easy to find. The small 

 lice perish after depositing eggs leaving only the latter to sur- 

 vive the winter. 



Economic Status."^ 



The danger from the woolly aphid is greatest to nursery stock 

 and young orchards. Mr. Marlatt (Journal of Economic Ento- 

 mology, A'^ol. 4. pp. 116-117) in recording the use of American- 

 grown apple seedlings says : — "Mr. P. W. Watson, of Topeka, 



-* "Mr. W. S. Griesa, proprietor of Mt. Hope Nurseries, Lawrence, 

 Kan:, has estaiblished the Griesa Research Fellowship in Entomology in 

 memory of his father, the late A. C. Griesa. Iw establishing this fel- 

 lowship it was the wish of the founder that the holder should devote 

 himself to a fundamental investigation of one of the several entomolo- 

 gical problems ever present with nurserymen. 



"Upon consultation, it was decided to select for the theme of this 

 research the Woolly Aphis. Mr. H. W. Lohrenz, A. B., McPherson 

 College, and a graduate student at the University of .Kansas, was 

 elected by the regents of the university to this fellowship. 



"The purpose of this research is, after careful experimentation in 

 remedy and prevention, and investigation into the life cycle of this 

 Aphis, to devise a practical means whereby nurserymen can properly 

 deal with this economic problem in such a way as to eliminate the 

 losses now attending the existence of this insect on nursery stock. 



"It is worthy of note as showing the interest of nurserymen generally 

 in foundations of this nature that the Western Nurserymen's Associa- 

 tion, an organization of nurserymen of the Middle Western States, 

 passed resolutions commending the founder of this fellowship for the 

 work he has instituted." Journal of Economic Entomology. Vol. 4, 

 p. 161. 



