Wilso7ir-Vickery~List of Aphididae. 23 
types of new genera or where generic names recently changed 
will probably stand. 
For the plant names the Index Kewensis compiled by B. Day- 
don Jackson has been used. A great many names listed as 
synonyms in that publication are now generally accepted and in 
such cases the names now in use are underlined and followed 
by the names recognized by Jackson. For example,—Acer ne- 
gundo = Negundo aceroides, which indicates that Acer negundo 
is now generally in use while Negundo aceroides was the name 
accepted by Jackson. 
Names in quotation marks are common names or else could not 
be located in the Index Kewensis. Generic names followed by 
specific names within quotation marks indicate that the specific 
names may occur several times with different synonyms. 
Among the abbreviations used occur some which are familiar 
to aphidologists but may not be to others. To make these clear 
a complete citation of these follows. 
APHIDIDAE ITALICA (Passerini) 1863—Archives per la 
Zoologia Fanatomia e la fisiologia, Vol. II, Fasc. 2. 
HEMIPTERA OP COLORADO (Cowen) 1895—(A Prelim¬ 
inary List of the Hemiptera of Colorado)—Colorado Agricul¬ 
tural Experiment Station Bulletin No. 3, Technical Series No. 1. 
KANSAS APHIDIDAE (Sanborn) 1904—(Kansas Aphid¬ 
idae with catalog of North American Aphididae and with Host- 
Plant List). The Kansas University Science Bulletin, III, No. 
1. (Whole series, Vol. XIII, No. 1). 
APHIDIDAE OP MINNESOTA (Oestlund) 1886—(List of 
the Aphididae of Minnesota with descriptions of new species) — 
Fourteenth Annual Report, Geological and Natural History Sur¬ 
vey of Minnesota. 
APHIDIDAE OF MINNESOTA (Oestlund) 1887—Synopsis 
of the Aphididae of Minnesota)—Geological and Natural His¬ 
tory Survey of Minnesota, Bulletin 4. 
APHIDIDAE OP NEBRASKA (Williams), 1911,—(The 
Aphididae of Nebraska)—University of Nebraska Studies X, 
No. 2. Supposed to have been published in 1910 but apparently 
was not issued until 1911. The species described as new in this 
paper were originally listed as new species in Special Bulletin, 
No. 1 from the University of Nebraska Department of Entomol¬ 
ogy, published in 1891. No description accompanied the names. 
