SUBFAMILY APHINAE 319 
Alate Vivipara. Head and thorax brown; abdomen light green with lateral areas and 2 
indistinct dorsal bands dusky; pulverulent; antenna beginning with tip of III, tip of cornicle, 
tips of tibiae and entire tarsi dusky; tibiae and cornicle except tips, cauda and anal plate pale; 
wing veins slightly bordered. Body length 2.2; across eyes about .70-‘‘.76’’; otherwise as in 
apterous vivipara. 
Ovipara. Apterous. (Cleared and mounted), dusky portions same as in apterous vivipara. 
Body length 2.8; hind tibia 1.8-2; antenna 3.50. Cauda .22-.25 on median line. Proximal third 
of hind tibia slightly swollen and bearing scattered flat sensoria. 
Collections. On leaves of Mertensia sp. and Solomon’s seal (Smilacina sp.). 
Colorado: Grand Mesa and in Rocky Mountain National Park. Apterous sum- 
mer viviparae.Aug. 4 and 24, alate viviparae Aug. 22, oviparae Aug. 24 to Sept. 
23; rare. 
Type. U.S.N.M. Paratypes, Colo. Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Pale green body, covered with pulveru- 
lence and with more or less of dorsal bands on abdomen of alate vivipara, small 
number of sensoria on III, short cornicle (but slightly more than half of an- 
tennal III), faint large reticulations on cornicle, long hind tarsal II and base of 
antennal VI and short rostral IV+-V (about half of the length of hind tarsal II) 
and comparatively short cauda with not more than 10 hairs. 
Macrosiphum pelargonii (Kaltenbach) 
The Geranium Aphid 
Aphis pelargonii Kaltenbach, 1843:21. 
Macrosiphum cornelli Patch (in Griswold), 1926:334 (alatiforms); Griswold, 1927:91 
(biology and host plants) ; Gillette and Palmer, 1934:174. 
Macrosiphum pelargonii Gillette and Palmer, 1934:192. 
Acyrthosiphon malvae Mosley, Hille Ris Lambers, 1947:234 (questionable synonymy). 
Apterous Summer Vivipara. Grape-green; legs pale brownish; cauda dusky green; 
cornicle pale with brownish tip; antenna dusky. Body length 2-2.3; across eyes .46-.52; hind. 
tibia 1.5-2; antenna 2.5-3.3; rostrum nearly attaining 3d coxa. Hairs blunt to slightly capitate; 
on side of abdomen .02-.03. Cornicle imbricated, without reticulation but often showing faint 
transverse striae next to flange. Cauda tapering, rather stout, hardly showing neck and bearing 
3-5 pairs of lateral hairs with one or two dorsal preapical ones. 
Alate Vivipara. Same as apterous vivipara except as follows: Body length 1.5-2; rostrum 
attaining 2d coxa. 
) TOPPA SL IS 0 ea) 
Uae 0 Oana Hpi er ras 
11) OY 
Apt Viv. 
Tae bate ry a. ae 
Fig. 381. Macrosiphum pelargonii 
Collections. On leaves of Pelargonium sp. Colorado: Boulder and Fort Col- 
lins. Apterous summer viviparae July, Sept., Nov., March and May, alate vivi- 
parae Feb. 22 to May 28; mostly in greenhouses. 
This species apparently differs from M. pelargonii only in the less numerous 
sensoria on III in typical apterae. Hille Ris Lambers (1947:234) finds some 
apterae, “alatiform,” with numerous sensoria and others with few sensoria in 
the same colonies. 
Chief Distinguishing Characters. Lack of reticulation on cornicle, long 
unguis (about 1.6-2 times IV, 1.5 times III), immaculate green body, short 
