SYNOPTICAL KEY TO THE APHIDIDAE OF MINNESOTA 2-130 
85. Genus MYZUS Passerini, 1860. Type: Aphis cerasi Fabricius, 
1775. Myzus partakes more of the Aphidini than any other genus 
of the group. The following species are known from Minnesota: 
(89) MYZUS CERASI (Fabricius) Passerini, 1860 
This black species is rather common on cherry. 
(90) MYZUS PERSICAE (Sulzer) Passerini, 1860 
A very common species on various field and garden plants. 
86. Genus NEOMYZUS Van der Goot, 1916. Type: Siphonophora 
circumflexus Buckton, 1876. This genus partakes somewhat of the 
Macrosiphini. 
(91) NEOMYZUS CIRCUMFLEXUS (Buckton) Van der Goot, 1916 
Found on Vinca and other plants. ~ 
(92) A species belonging here is e2lso found on the rose. 
87. Genus CAPITOPHORUS Van der Goot, 1913. Type: Aplus 
carduinus Walker, 1850. The numerous and long sensilla on the body, 
especially in the apterous forms, relate this genus to the Callipterini. 
The following species are found in Minnesota: 
(93) CAPITOPHORUS CARDUINUS (Walker) Van der Goot, 1913 
Common on Canada thistle. 
(94) CAPITOPHORUS XANTHII (Oestlund) 
On Xanthium or cocklebur. 
(95) CAPITOPHORUS ROSARUM (Walker) 
Found on rose 
88. Genus CRYPTOMYZUS nomen nov. Type: Aphis ribis Lin- 
naeus, 1758. Van der Goot considered this as the type of his genus 
Myzus, but incorrectly so. 
(96) CRYPTOMYZUS RIBIS (Linnaeus) 
Common on currant, cupping the leaves. 
89. Genus PHORODON Passerini, 1860. Type: Aphis humul 
Schrank, 1801. One representative of this genus is rather abundant: 
(97) PHORODON HUMULI (Schrank) Passerini, 1860 
Found mostly on wild hops. 
go. Tribe MICROSIPHINI. Cholodkovsky in 1908 erected the 
genus Microsiphum for a very peculiar form that is not an Aphis, 
a Myzus, or a Macrosiphum. It is a representative of a characteristic 
tribe and fauna found on Artemisias and related plants on the great 
plains. When Aphis frigidae was described as new in 1886 from 
Artemisa frigida, it was seen that it did not look o behave like an 
ordinary Aphis, but would eventually become a distinct genus. A 
second species was also described at the same time from the same 
