SUBFAMILY APHINAE 299 
hind tibia with proximal seventh slightly swollen and bearing scattered flat, indistinct sen- 
soria; cauda .30-.43 on median line, .35-.48 on side; cornicle 1.05-1.15, reticulated area .15. 
Male. Alate. Head and thorax brown; abdomen marked with short dorsal bands on I 
through VI; cornicle and cauda pale; antenna black except II and base of III which are 
dusky; rostrum and tibiae dusky especially at tips. Body length 1.50-1.80; antenna about 5; 
hind tibia 2.65-2.85; cornicle .50-.65, reticulated area .10-.15; cauda .20 on median line, .25 on 
side. 
Collections. On Rudbeckia montana, on leaves and stems. Colorado: Sky- 
way. Apterous viviparae June 25 to Sept. 23, alate viviparae July 30, oviparae 
Sept. 14 to Oct. 3, males Sept. 3; not common. 
Type. U.S.N.M. Paratypes, Hottes Collection. 
.Ol— 1.3 
$2n"l6 -23- Ltg- 130 
L43- 1.75 o& 1.60-1.90 
ANT eens a SDP is pa 
Fig. 356. Macrosiphum cockerelli 
Chief Distinguishing Characters. Light green body, number of sensoria on 
III of alate vivipara (16-23), small number of sensoria and their location on 
proximal seventh of hind tibia of ovipara, length of reticulated area on cornicle 
(.15-.25), length of rostral IV+V (.15), length of antennal IV (about the same 
as III) and length of unguis (about the same as cornicle in apterous vivipara, 
longer in alate vivipara). 
Macrosiphum corallorhizae (Cockerell) 
Nectarophora corallorhizae Cockerell, 1903a:167. 
Apterous Summer Vivipara. ‘‘Green without markings”; antennal V and VI and tips of 
III and IV, rostral IV-+V and cornicle beyond base dusky; tarsi and tips of tibiae blackish; 
cauda and anal plate pale. Body length 2.5-3; across eyes .53; antenna 4-4.5; hind tibia 2.8-3; 
rostrum attaining 2d coxa. Hairs blunt to slightly capitate; on vertex and antennal III .04-.05 
long; on hind tibia pointed, .04-.05, about same length as diameter of tibia. Cauda slender and 
tapering to blunt tip, bearing 4-5 hairs on each side. Cornicle somewhat curved outward at 
tip and slightly constricted on reticulated area. 
SOA le 
Fig. 357. Macrosiphum corallorhizae 
Collections. On Corallorhiza multiflora. New Mexico: Beulah. Apterous 
viviparae in July; numerous. 
Type. U.S.N.M. 
