318 APHIDS OF THE ROCKY MOUNTAIN REGION 
Alate Vivipara. Head and thorax black; abdomen mahogany-red to Mars-orange, with 
black band across V and VI and broken white intersegmental lines between all segments; 
cauda and legs except tips of segments yellow; tarsi, tips of tibiae and entire cornicle black; 
antennal I and II blackish, remainder dusky; fore wing dusky at tip between radial sector and 
media I. Body length 2-2.5; across eyes .55; hind tibia 1.5-1.9; antenna 3; rostrum attaining 
2d coxa. Otherwise as in apterous summer vivipara. 
Ovipara. Apterous. Deep pink or red-ochre with head and band across abdominal IV, V 
and VI blackish; appendages mostly brownish; cornicle brownish at base becoming black 
distally; cauda and anal plate pale. Body length 1.8; hind tibia .70; hind tarsal II .09; 
antenna 1.05, III .24, IV .14, V .14, VI .07++.35; cornicle .20; cauda .15 on median line; rostral 
IV++V .10. Proximal half of hind tibia slightly swollen and bearing sensoria. 
Male. Alate. Color similar to alate vivipara. Body length about 2; hind tibia 1.40; hind 
tarsal II .14; cornicle .40, reticulated area, hexagonal to .10 then closed imbrications to .15 
from tip; cauda .12 on median line, .15 on side, width at base almost equal to length. Antenna 
as in alate vivipara except for the presence of about 14 sensoria on V. 
Collections. On leaves and stems of cultivated rose. Colorado: Manitou and 
Log Cabin (west of Livermore). Utah: Lonetree. Fundatrix (possibly not this 
species) June 19, apterous summer viviparae June 25 and July 9, alate viviparae 
July 9 to Aug. 21, oviparae Sept. 12, male Aug. 21; rare. 
Cotype. Alice P. Macdougal Collection, Univ. %f Brit. Columbia, Canada. 
This species is peculiar in showing radical differences in the fundatrix and 
ovipara in length of appendages and rostral IV+V, unless indeed the examples 
here described as such belong to another species. No life history work was done 
with these forms. 
Chief Distinguishing Characters. Striking body color (reddish with black 
bands on abdomen, black cornicle and yellow legs), sensoria on III numerous on 
alate vivipara and absent on aptera, rather slender cauda, bearing 4-5 pairs of 
lateral hairs, sculpture on cornicle and rather long hairs on hind tibia. 
The identification of this species was aided by the study of Miss Macdou- 
gall’s specimens, loaned by G. I. Spencer of the University of British Columbia. 
The statement in original description that cornicle is “reticulated throughout” 
is inaccurate, as her specimens show the same amount and character of reticu- 
lation as the Colorado examples and they also show hind tarsal II length .15 
instead of .20 as given in the description. 
Macrosiphum niwanistum (Hottes) 
Adactynus niwanista Hottes, 1933:16. 
Macrosiphum niwanistum, Gillette and Palmer, 1934:191; Hottes, 1948a:29. 
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Fig. 380. Macrosiphum niwanistum 
Apterous Summer Vivipara. Light green; pulverulent; cornicle pale with dusky tip; 
cauda, anal plate and tibiae except tips pale; antenna dusky beginning with tip of V; rostral 
III and IV+-V, tips of tibiae and entire tarsi dusky or brown. Body length 2.8; across eyes 
-65-“.70"; hind tibia 2.8; antenna 4.3-4.8; rostrum attaining between 2d and 3d coxae. Hairs 
blunt or pointed; on side of abdomen .05. Lateral tubercles present on pronotum. Cornicle 
with faint reticulations about 4 rows from tip. Cauda broad, somewhat spatulate, bearing 2 
lateral and 2 dorsolateral pairs of hairs and a single dorsal preapical one. 
