IOWA ACADEMY OF SCIENCES. 
89 
IKinicola Thos. , which was also suggested by Thomas, but so far 
as descriptions can be relied upon venusta seems to be more 
closely related to corni. Quoting from the American Entomol- 
ogist, 1880, page 129, he also says: “This species. Pemphigus 
hoyeri Pass. , is believed by Lichtenstein to represent two of the 
stages of Scliizoneura corni Koch,” but Lichtenstein, in his mono- 
graph in 1885, gives ''Pemphigus hoyeri Pass. = Aphis radicurn 
Boyer, Arnycla fuscifrous Koch., forme souterraine du Tetraneura 
ulmV’^ 
Buckton says: “M. Lichtenstein has hazarded the supposi- 
tion that Schizoneura venusta is the underground form of Schizo- 
neura lanuginosaP He also gives Ancecia corni Fabr. But Lich- 
tenstein, in his Mon. Des Aphideans, 1885, gives Ancecia corni 
Koch, as a synonym of Schizoneiirct IPjchiiljic\it. Koch’s figures 
of Ancecia corni is not colored to represent a typical Schizoneura 
eorni. 
SYNONYMS. 
Schizoneura corni Fab. 
(1794) Ap/As corm Fabricus, Ent. Syst., IV, 214. 
(1857) Schizoneura vacgans Koch, Die Pflanzenlause Aphiden, 
:268. 
(1857) Anoecm co?m (?) Fab., Koch, Pflanzenlause Aphiden, 
275. 
(1860) Schizoneura venusta Passerina (?), Gli Afida, p. 38. 
(1852) Eriosoma fling icolaYheAAh, Proc. Ent. Soc., Phil., I, 
304. 
(1862) Eriosorna cornicola ^ ddAh, Proc. Ent. Soc., Phil., I, 
304. 
(1872) Schizoneura corni ¥dA)., Kaltenbach Monographie der 
Familien der Pflanzenlause, p. 168. 
Schizoneura corni var (?) panicola Thos. 
(1879) Schizoneura panicola Thomas, 8th Rep. 111. Ent., p. 
188. 
(1889) Schizoneura corni Fab., Osborn Bull. 22 Div. Ent. U. 
S. Dept. Ag., 1889. 
* At the time I prepared Diy article on this subject in 1889 I overlooked the refer- 
ences to the subject in Am. Entom. and in Forbes’ Report, and while I was aware that 
Lichtenstein had been' at work upon the migrations of some species, notably those 
infesting elm, his works were not at the' time accessible to me. and I was entirely una- 
ware that any suggestion even had been olfered that Schizoneura corni had a subterra- 
nean form, H.O| 
