10 APHIDS OF THE ROCKY MOUNTAIN REGION 
This group is placed under the Pemphiginae by some authorities, but the 
rather mammiform cornicle, the conspicuous hairiness, the absence of wax 
glands and the possession of functional mouth parts by the sexuales seem to 
the writer to definitely separate it from Pemphiginae and ally it to the Lach- 
nini. The rounded cauda and anal plate agree with both groups. The pro- 
truding, sometimes elongate-oval sensoria and the lack of gonopophyses agree 
with Pemphigini; but these characters seem less definite than those which 
disagree with this group. 
Only one genus represented in region. 
Genus Anoecia Koch 
Koch 1856:275; Baker, 1920a:13. f 
Characters. Same as for subtribe also unguis much shorter than base of 
VI; hind wing with two cross-veins; cauda rounded, broader than long; anal 
plate entire. Sexuales apterous, with beaks and feeding; ovipara laying one 
to four or more eggs. Spring forms living exposed above ground, summer forms 
usually on roots. 
Genotype (monotypical), Anoecia corni (Fabricius). 
Key to Species of Anoecia 
1. Sensoria narrow-elongate, 6-19 on III of alata; summer aptera with III 
<8O Tong ( peel): ecccccc ics sceelee os coe nns bese seek a eae c area ee eS oa corni 
Sensoria oval, 0-8 on III of alata; summer aptera with III shorter than .30 long............ 2 
2. Sensoria in alata nearly always large and uniform; III in summer aptera shorter 
than,.15) (p..12)) tia ee a se querc! 
..Sensoria in alata rarely large; III in summer aptera longer than .15....2.....20....:220cceeeeeeeeeee 3 
3.. Unguis slender and fingerlike; ‘apterayblack(p. 11)) 2 ee eee graminis 
Unguis stout, rather conical; aptera yellow, usually with dusky markings........................ 4 
4. Hairs bent near base so as to stand parallel to body (p.011)2.: 2.2 oenotherae 
Hairs straight or somewhat curved; not; bent (p..13)) 0]. setarlae 
[Genotype Anoecia corni (Fabricius) ] 
Summer Aptviv. 
32 - 35 A3 Ie 
Alate Viv. — OCS AO LEORS 
Sen. 12- Summer alars Viv 
oy 2 
ESAS 
Fall Migrant 
fe Ss 
A cen 12 dé -18 JesnB janjsé (Wings after Buckton) 
4-6 2-6 Shier Baker) 
Alate Viv. . 9-11 
(From Specimens 
det. by Mimeur) 
Fig. 2. Anoecia corni 
Aphis corni Fabricius, 1775:736. 
Anoecia corni Koch, 1856:275; Theobald, 1929:83; Baker, 1916e:359; Mordvilko, 
1935:281. 
Apterous Vivipara. Brown to black; appendages black. Body length 2-2.3. 
Alate Vivipara. Head and thorax black; abdominal segments pale green, with black 
crossbands on posterior segments; appendages dark. Measurements of spring and summer 
