REPORT OF THE STATE ENTOMOLOGIST I9QI17 39 
section are most strongly advised to watch for the development 
of the insect next season and to spray with an arsenical poison all 
trees showing signs of its work, since it is very important to control 
it so far as possible because experience has demonstrated that it is 
easier to handle an outbreak in its incipiency than to begin after 
serious losses have occurred. 
Bibliography 
1883 Rouast, Georges. Catalog des Chenilles Européennes Connues, p. 140 
(on apple and pear, August and September, Simaethis) 
1890 Jordan, R. C. R. Ent. Mon. Mag., 26:189 (moths in thatch, Nov., 
Simaethis) 
1890 Bower, B. A. Ent. Mon. Mag., 26:271 (moths in thatch in spring, 
Simaethis), p. 271 
1895 Meyrick, Edw. A handbook of British Lepidoptera, p. 706-7. (Descrip- 
tion, habits, Simaethis) 
1900 Tutt, J.W. Ent. Rec. & Jour. of Var., 12:352 (pariana type) 
1900 Fernald, C.H. Can. Ent. 32:236 (synonymy, pariana type) 
1901 Staudinger, O. & Rebel, H. Catalog der Lepidopteren, p. 129 (Simaethis) 
1902 Tutt, J. W. Ent. Rec. & Jour. of Var., 14:168 (pariana type) 
1903 ———— Ent. Rec. & Jour. of Var., 15:242. (Adults in Sept. and Oct. 
on flowers of Compositae, Xylopoda) 
1906 West, William. Ent. Rec. & Jour. of Var., 18:285 (amongst golden- 
rod, Xylopoda) 
1908 Grund, F. Zeitschrift fur wissenschaftliche Insektenbiologie, 4:2 
(Simaethis) 
I91t Reh, L. Die Schadlinge des Obst-und Weinbaues, p. 28-29 (brief 
account, Simaethis) 
Handbuch der Pflanzenkrankheiten, Dritter Band, p. 274-75 
(brief account, Simaethis) 
1915 Gelin, H. & Lucas, D. Catalog des Lépidoptéres Observés dans L’ouest 
de la France, p. 75 (Simaethis) 
1917 Felt, E.P. Apple and Thorn Skeletonizer. Econ. Ent. Jour., 10:502 
1918 — Apple and Thorn Skeletonizer. Cornell Extension Bul. 27 
1918 ————— Apple and Thorn Skeletonizer. Ent. Soc. Ont. 48th Rep’t, 
P- 44-47 
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1913 

POTATO APHIS 
Macrostphum solanifolia Ashm. 
The season of 1917 was remarkable for a widespread outbreak 
of potato aphids, mostly the above-mentioned species, though the 
green peach aphis, Myzus persicae Sulz., may have been 
associated in the destructive work. It is quite probable that this 
unexpected outbreak was due to climatic peculiarities, particularly 
as this insect is known as a somewhat destructive species in the 
cooler, presumably normally moister climate of Maine. 
