98 



Slides 



In the following annotated list of slides the complete label on each 

 slide is indicated by quotation marks. 



"27" and "Pea May 28, '78." Macrosiphum pisi Kalt. Winged 

 and wingless females on slide. Very probably the specimens 

 from which he drew up his description of pisi, which he says 

 were collected at Carbondale in May. 



"32" and "Aphis vihurni." One winged female mounted in balsam. 

 This is evidently not Aphis vihurnicola Gil, nor does it appear 

 to be the European A. vihurni Scop., which probably does not 

 occur in this country. It seems to be the same species which 

 I have found abundant on Viburnum in the Chicago parks, 

 and which Mr. Monell has collected in St. Louis, Mo. It is 

 probably a new species. 



"35". This is probably Chaitophorus qucrcicola Monl. {-^Callip- 

 tcrus qucrcifolii Thos.). Only the wings and a portion of the 

 thorax remain. 



"58". Colopha nlmicola Fitch. 



''76" and "Plum Carb[ondale, 111.] Apr. 20, '78". The specimen, 

 a single winged individual, is not in very good condition. It 

 may be the species which Thomas referred to Aphis pruni 

 Koch (Eighth Report, p. 87), since he says of that: "ap- 

 peared early in the season on one of my plum trees [Carbon- 

 dale, 111.] but soon disappeared." The single preserved speci- 

 men, however, differs from Thomas's rather anomalous 

 description of pruni in that the antenn?e do not reach to the 

 base of the cornicles. The species is apparently not Aphis 

 prunifolicc Fitch, which may or may not be identical with A. 

 pruni Koch. 



"80". Pemphigus populicaulis Fitch. See also under vial 80, page 

 103. 



"81." Aphis prunifolicc Fitch. See also under vial 81, page 103. 

 "82". Phorodon Jiumuli Schr. See also under vial 82, page 104. 

 "83". Pemphigus fra.vinifolii Riley. Probably Thomas's types. 

 Poor specimens. See also under vial St,, page 104. 



"84". Macrosiphum viticola Thos. See also under vial 84, page 

 104. 



"86". Callipterus punciatus Monl. See discussion under vial 86, 

 page 104. One specimen has venation rather heavy and the 



