October, '10] DAVIS: ILLINOIS APHIDID.E 409 



* P. caryce-glohuli Walsh: Pergande, loc. cit. p. 222. (Quotes the 

 scattered description of Walsh and Shimer.) I found this species on 

 hickory at Lake Forest, 111., June 29, 1909, the galls at that time 

 containing large numbers of the winged individuals. After an initial 

 determination by the writer, specimens were sent to Mr. Theo. Per- 

 gande who, in a letter of April 4, 1910, said, '' The real Phyll. caryce- 

 glohuli Walsh I had never seen before, though I think you may be 

 right." First reported by Walsh. 



^ P. caryoe-gummosa Riley: 7th Rept. St. Ent. Mo. (1875), p. 118; 

 Pergande, loc. cit. p. 238, 3 figs. I find no record of its occurrence in 

 Illinois. 



*^ P. caryce-semen Walsh: Pergande, loc. cit. p. 211, 2 figs. I do 

 not know this species. First reported by Shimer. 



* P. caryce-septem Shimer: Pergande, loc. cit. p. 190, 7 figs. I am 

 unacquainted with this hickory gall-maker. First reported by Shimer. 



^ P. carywvence Fitch : Pergande, loc. cit. p. 239, 10 figs. I find no 

 record of its occurrence in Illinois, other than that in Hunter's Cat- 

 alogue. 



* P. conica Shimer: Pergande loc. cit. p. 225, 7 figs. First reported 

 by Shimer. 



* P. depressa Shimer: Trans. Amer. Ent. Soc, Vol. 2, p. 389 (Per- 

 gande loc. cit. p. 208, quotes Shimer). First reported by Shimer. 



* P. foveata Shimer (=zfoveatum Shimer). Trans. Amer. Ent. Soc, 

 Vol. 2, p. 393 (Pergande, loc. cit. p. 209, quotes Shimer). First re- 

 ported by Shimer. 



* P. glohosum Shimer: Pergande, loc. cit. p. 236, 4 figs. Quotes and 

 discusses Shimer's confused descriptions. First reported by Shimer. 



* P. minimum Shimer: Trans. Amer. Ent. Soc, Vol. 2, p. 391 

 (Pergande, loc. cit. p. 210, quotes Shimer). First reported by Shimer. 



'^ P. rileyi (Licht. MS.) Riley: Pergande, loc. cit. p. 261, 4 figs. 

 I find no record of this species having been taken in IlHnois other than 

 that in Hunter's Catalogue. 



* P. salicola Perg. : loc. cit. p. 267, 8 figs. This species is very 

 common in some of the Chicago parks. It occurs in the crevices of the 

 trunk and larger branches of the -udllow, appearing as small white 

 flocculent masses, and when abundant, as it sometimes is, gives the 

 willow trunks an unsightly appearance. 



* P. suhelliptica Shimer: Pergande, loc. cit. p. 239, 10 figs. Quotes 

 Shimer in full. First reported. by Shimer. 



P. vitifolice Fitch (^vastatrix Planch.): Riley, 6th Rept. St. Ent. 



^ Although Walsh does not give any definite locality, he very probably collected, 

 it in Illinois. 



