PINK AND GREEN APHID OF POTATO. 21 5 



Upon this evidence the potato pest of Maine fields was identified -with 

 the "pepper vine" aphid of Florida, after comparing it with specimens 

 which were being determined by Mr. Pergande as solanifolii. 



The original description of the wingless female accords with the 

 species generally known as solanifolii except that "style short, conical," 

 i^ hardly applicable to any mature representative of the genus concerned. 

 For this reason it seems likely that the specimen recorded may have been 

 in the last n3rmphal stage, at which time the style or cauda would De 

 short and conical. As was custo^mary at that time, the spur of the 

 sixth antennal joint is designated as the seventh. 



The so-called male of the original description is the winged form of 

 some other species of aphid. 



It is an interesting fact that this species, though widely known in 

 this country as a rose aphid and existing in various collections under a 

 commonly recognized manuscript name, has not been described from the 

 rose, although its identity with solanifolii remained unsuspected and it 

 has for some years been supposed to be an undescribed rose species. 



Considering the range of food plants this aphid accepts it would oe 

 surprising if the synonomy when it is finally worked out did not con- 

 tain a long list of names. It is certain that it has been recorded lor 

 pisi at times and it is possible thait some of the food plants accredited, 

 to pisi really belong to the dietary of solanifolii. 



The present paper is not concerned with the question as to whether 

 solanifolii should fall as a synonym of some well known European 

 species. It seems safer to confine the problem to America, at least until 

 we learn to recognize this species on our own territory regardless of 

 the foodplant from which it is collected. 



LITERATURE. 



1882. Ashmead, Wm. Siphonophora solanifolii. On the Aphididae of 

 Florida with descriptions of new species. (Paper No. 3.). 

 Can. Ent. Vol. 14. p. 92. Original description of apterous 

 viviparous form. The so-called "male" is a winged form ot 

 some other species. 



1905. Fletcher, James. Nectarophora solanifolii. Ann. Rept. on Expt. 

 Farms for 1904, p. 228. 



1907. Patch, Edith M. Nectarophora solanifolii. In Insect Notes for 

 1906. Me. Agr. Expt. Sta., Bulletin 134, p. 215. 



1907. Fletcher, James. Nectarophora solanifolii. Ann. Rept. on Expt. 

 Farms for 1906, p. 210. 



1907. Patch, Edith M. Nectarophora solanifolii. The Potato Plant 

 Louse. Me. Agr. Expt. Sta., Bulletin 147, pp. 235-257. Figs. 

 25-33- 



1911. Patch, Edith M. Macrosiphum solanifolii. Two species of Ma- 

 crosiphum. Me. Agr. Expt. Sta., Bulletin 190, pp. 81-92. Figs. 

 59-66. Compared with M. destructor. 



1911. Davis, J. J. Macrosiphum solanifolii. List of Aphididae of Illi- 

 nois. Journal of Economic Entomology, Vol. 4, p. 330. 



