Vol. xxii] ENTOMOLOGICAL NEWS 243 



vember 15, 1910, Mr. Davidson writes: "I found Schisoneura 

 querci Fitch in flocculent masses on the under side of the leaves 

 and also on the twigs of live oaks (Q. agrifolia and Q. wiz- 

 lensii). I have taken a few winged specimens, and the vena- 

 tion is that of Schisoncura." The present writer listed § this 

 species from Illinois, upon Fitch's authority and refers to a 

 PhvUaphis collected in Illinois on oak leaves which he consid- 

 ers probably distinct from querci of Fitch. 



It is with considerable doubt that I place the species found 

 in Illinois the past few years as identical with the species de- 

 scribed by Fitch as querci. The species which we have found 

 and describe later in this paper lives on the upper- and under- 

 surfaces of the leaves in small colonies, which are completely 

 covered with a rather dense flocculence. During the summer 

 only wingless viviparous females were found, while winged 

 males and oviparous females were collected in October. In 

 one instance a wingless male was taken. The species is quite 

 variable, but evidently does not belong to the genus Schison- 

 eura. Neither does it fully agree with the genus Phyllaphis, 

 although it is more nearly related to this than it is to Schison- 

 eura. From the unusually loose description given by Fitch, 

 it is impossible to positively recognize the species. The prin- 

 cipal characters of querci as given by Fitch are its habitat and 

 color, the former agreeing quite well with the species before 

 us, but the color being quite different, our species being pale 

 greenish in the viviparous to pale brownish in the oviparous 

 forms. Ashmead* described a black aphid on oak which he 

 called Phyllaphis niger. which agrees more nearly with the spe- 

 cies characterized by Fitch as querci. Full descriptions are 

 herewith given, hoping that they will be an aid to future in- 

 vestigations. As the writer has above indicated, he is of the 

 opinion that Fitch's species is possibly different from the one 

 here described, but that this one is the same as the species 

 considered as querci Fitch by Oestlund, Cowen and Davidson. 



§ A list of the Aphididae of Illinois, with notes on some of the spe- 

 cies. Journ. Econ. Ent., Vol. Ill (Oct., 1910), p. 413. 



*0n the Aphididae of Florida, with descriptions of new species. 

 Can. Ent., Vol. XIII (1881), p. 155. 



