lod 
SYNOPTICAL KEY TO THE APHIDIDAE OF MINNESOTA 147 
119. Tribe VACUNINI. Antennae 5-jointed; body and append- 
ages more or less hairy as in Chaitophorini. 
Qe (EMSS: WAC WIN Ac pres Coan Since eRe cm cates cM RM ger er eater op Sara el 120 
120. Genus VACUNA (Heyden) Kaltenbach, 1843. Type: Aplus 
dryophila Schrank, 1801. Heyden included coccinea and dryophila 
without indicating either as type. His description of the genus would 
imply dryophila as the type rather than coccinea, which he interpreted 
as also having five segments to the antennae like dryophila. Kalten- 
bach restricted the genus to dryophila and placed coccinea in Boyer’s 
genus Phylloxera. Hence Vacuna (Heyden) Kaltenbach, 1843 in sen. 
str. is monotypic with dryophila as the type, as implied and accepted 
by most authors since the time of Kaltenbach. There is no good reason 
for discarding this well known term. Formerly authors endeavored 
to conserve the older terms; modern writers too often discard them on 
mere technicalities. Neither Heyden nor Kaltenbach recognized types 
‘in the modern chronological sense but their genera were erected on all 
the species included. Heyden had no true conception of the genus 
Phylloxera, and the species in hand he attempted to interpret as a 
Vacuna. Jxaltenbach corrected this and restricted Vacuna as now 
understood. , 
(127) VACUNA DRYOPHILA (Schrank) Heyden, 1837 
Not known from Minnesota. 
121. Supertribe SCHIZONEUREA. Sexes small and> without 
rostrum; fundatrix with 6, 5, or 4 segments to the antennae; media 
with one branch or simple; found in folded leaves, in nests of ants, 
or in true galls. The following tribes may be separated: 
a. Fundatrix with 6 or 5 segments; media with one branch; cornicles usually 
present as pores; antennae of migrant 6-jointed; found in folded leaves.. 
Tribe SCHIZONEURINI 122 
b. Cornicles wanting; media of fore wings simple; antennae of migrant with 
5 or 6 segments; found in nests of ents..............- Tribe FORDINI 124 
c. Cornicles wanting; media of fore wings with one branch or simple; 
fundatrix with only four segments to the antennae; migrant with 5 or 
Gratoundtineatnuercallsteascry oeimc. elect rc Tribe TETRANEURINI 125 
122. Tribe SCHIZONEURINI. Media of fore ‘wings with one 
branch; transverse veins in hind wings far apart at place of origin; 
migrant with six segments to the antennae ; fundatrix with five, or some- 
times with six segments ; wax glands composed of large facets arranged 
concentrically. One genus is represented in Minnesota: 
a; ~ Medtamynithigome sbtanchioncr = stkean secre eee Genus SCHIZONEURA 123 
