REPORT OF THE STATE ENTOMOLOGIST IQI/ 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 Europecnnes 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, Eiw. A handbook of British Lepidoptera, p. 706-7. ( Descrip- 

 tion, habits, Simaethis) 



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



1900 Fernali, C. H. Can. Ent. 32:236 (synonymy, pariana type) 



1931 Stauilnger, O. & Rebel, H. Catalog der Lepidopteren, p. 129 (Simaethis) 



1902 Tutt, J. W. Ent. Rec. & Jour, of Var., 14: 16S (pariana type) 



1903 — ■ Ent. Rec. & Jour, of Var., 15:242. (Adults in Sept. and Oct. 



on flowers of Compositae, Xylopoda) 



1936 West, William. Ent. Rec. & Jour, of Var., 18:285 (amongst golden- 

 rod, Xylopoda) 



1908 Gruad, F. Zeitschrift fur wissenschaftliche Insektenbiologie, 4:231-32 

 (Simaethis) 



191 1 Rei, L. Die Schilling des Obst-und Weinbaues, p. 28-29 (brief 

 account, Simaethis) 



1913 — ■ ■ Handbuch der Pdanzenkrankheiten, Dritter Band, p. 274-73 



(brief account, Simaethis) 



1915 Gelil, H. & Lu:a3, D. Catalog des Lepidopteres Observes dans L'ouest 

 de la France, p. 75 (Simaethis) 



1917 Felt, E. P. Aopls anl Thorn Skeletonizer. Econ. Ent. Jour., 10:502 



1918 — ■ — Apple, and Thorn Skeletonizer. Cornell Extension Bui. 27 



1918 Apple and Thorn Skeletonizer. Ent. Soc. Ont. 48th Rep't, 



P- 44-47 



POTATO APHIS 



Macrosiphum solanijolii Ashm. 



The season of 191 7 was re.narkable for a widespread outbreak 

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

 green peach aphis, M y z u s persicae Sjl1z., may hav3 bssn 

 associated in the destructive work. It is quite probable that th ; s 

 unexpected outbreak was da? to clinatic p3culiaritie3, particularly 

 as this insect is known as a sonevhat destructive sp3cies in the 

 cooler, presanably normally moister climate of Maine. 



