334 APHIDS OF THE ROCKY MOUNTAIN REGION 
Macrosiphum zionensis Knowlton 
Macrosiphum zionensis Knowlton, 1935a:115. 
Apterous.Summer Vivipara. (Mounted on slide), colorless with antenna dusky; cornicle, 
tarsi and tips of tibiae black; cauda and most of tibiae pale. Body length 3.90-“4.06”; across 
eyes .65; antenna over 5.20; hind tibia 3.60-‘3.70”; rostrum attaining 2d coxa. Hairs blunt to 
slightly capitate on antenna; on body slender and pointed; on tibiae spinelike. 
Alate Vivipara. ‘‘Green.’”’ (Mounted on slide), pale; cornicle and tips of appendages 
black; extreme base of antennal III and cauda pale. Body length over 3; across eyes .62; 
antenna longer than 5,20 (tip broken); hind tibia 3.10-‘'3.40’. Hairs on body and antenna 
pointed to slightly blunt, on tibiae spinelike. Otherwise as in aptera. 
ee Rewer i —'"1 ao" 
Sen."25-27' hep re 
TOI TSO OA OI eA icy (Bro ken) 
15 5ie "1,03" Ag a B0 + 5 3-15 
Alate CO. Ty yy VPP VI Nyy 
85-388 aL 
Fig. 401. Macrosiphum zionensis 
Collections. On Lupinus sp. Utah: Panguitch. Apterous and alate viviparae 
July 14; rare. 
Type. Knowlton Collection. 
Chief Distinguishing Characters. Number of sensoria on III (in alate vivi- 
para more than 20, in aptera fewer than 7); and length of IV (almost as long as 
III). 
Macrosiphum zymozionensis Knowlton 
Macrosiphum zymozionensis Knowlton, 1946a:1. 
Apterous Summer Vivipara. (Mounted in balsam), body pale without dusky spots at 
bases of hairs; with all appendages more or less dusky, cornicle lighter proximally. Dorsal 
integument somewhat rugulose. Body length ‘1.67’’-2.15-“2.31"; across eyes .43-.45; antenna 
1,75-“1.88’; hind tibia ‘'1.07’’-1.25-1.4-'1.88"; rostrum attaining 2d coxa. Cauda tapering, 
narrow, often asymmetrical, bearing 3-5 lateral pairs and 2-3 single dorsal hairs. Cornicle 
cylindrical and heavy. Hair slightly capitate, especially on body and antenna. 
4 bate erin 
48-.52,.S€N.32-"42" .32-,38 Sen.2-6 26 .30 102 33-.3 
I _Viv, Fig. 402. Macrosiphum zymozionensis 
Alate Summer Vivipara. Body length ‘1.05’-2.1; across eyes .44; antenna 1.75-‘'1.79"; 
hind tibia 1.25-‘'1.37”; rostrum attaining 2d coxa. Otherwise same as apterous vivipara except 
as figured. 
Ovipara.* Apterous. Same as apterous vivipara except hind tarsal II .12-.13 and hind 
tibia proximal half of which is somewhat swollen and bearing numerous sensoria. 
Male. A single specimen, too mutilated to describe. 
Collections. On Aster leucanthemifolius. Utah: Zion Canyon National Park. 
Colorado: Fort Collins. Apterous and alate summer viviparae July 10, sexuales 
Nov. 10; very rare. 
Type. Knowlton Collection. 
*These oviparae were not taken in same colonies or even in same locality as the vivi- 
parae so there is no proof of their belonging to the same species, but this tarsal dif- 
ference seems insufficient basis for a separate species. 
