REPORT OF THE STATE ENTOMOLOGIST I917 39 



section are most stronj^ly advised to watch for the development 

 of the insect next season and to spray with an arsenical ]:)oison 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 



188;, Rouast, Georges. Catalog des Chenilles Europeennes Connuos, p. 140 

 (on apple and pear, August and September, Simaetliis) 



1890 Jordan, R. C. R. Ent. Mon. Mag., 26:189 (moths in thatch, Nov., 

 Simacthis) 



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, hal)its, Simaethis) 



1900 Tutt, J. W. Ent. Rec. & Jour, of Var., 12:352 (pariana type) 



T900 Fernald, C. H. Can. Ent. 32:236 (synonymy, pariana type) 



igoi 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 Insektenbiologic, 4:231-32 

 (Simaethis) 



191 1 Reh, L. Die Schadlinge des Ubst-und Weinbaucs, p. 28-29 (brief 

 account, Simaethis) 



1913 Handbuch der Pflanzenkrankheiten, Dritter Band, p. 274-75 



(brief account, Simaethis) 



19 1 5 Gelin, H. & Lucas, D. Catalog des Lepidopteres Observes dans L'ouest 

 de la France, p. 75 (Simaethis) 



191 7 Felt, E. P. Apple and Thorn Skeletonizer. Econ. Ent. Jour., 10:502 



191 8 Apple and Thorn Skeletonizer. Cornell Extension Bui. 27 



191 8 ■ Apple and Thorn Skeletonizer. Ent. Soc. Ont. 48th Rep't, 



p. 44-47 



POTATO APHIS 



Macrosiphnm solan if olii Ashm. 



The season of 191 7 was remarkable for a widespread outbreak 

 of potato aphids, mostly the above-mentioned species, though the 

 green peach aphis, Myzus persicae Sulz., ma}^ 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 Icnown as a somewhat destructive species in the 

 cooler, presumably normally moister climate of Maine. 



