296 APHIDS OF THE ROCKY MOUNTAIN REGION 
Alate Vivipara. Head and thorax black; abdomen ‘brown or red’’; cornicle and appen- 
dages black; cauda and anal plate blackish. Body length 2; hind tibia 1.15-1.40; antenna about 
2; rostrum attaining 3d coxa or abdomen. 
Collections. On Stephonomeria pauciflora. Colorado: Gateway. Apterous 
and alate viviparae Sept. 14; rare. 
Type. U.S.N.M. 
Chief Distinguishing Characters. Broad to red body with black appendages, 
numerous sensoria on III (25-30 in alate and 15-23 in apterous vivipara), short 
extent of reticulation on cornicle (less than .1), few hairs on the cauda (3- 4 
pairs) and length of rostral IV-+-V (.12). 
Macrosiphum breviscriptum Palmer 
Macrosiphum breviscriptum Palmer, 1936a:277 and 744. 
Apterous Summer Vivipara. Medium green; antenna beyond base of III, cornicle except 
base, rostral IV-+V, distal third of femora and tibiae except area just beyond knee, black; 
cauda, anal and genital plates pale greenish. Body length 2.5; across eyes .48-.50; hind tibia 
1.9-1.95; antenna 3.60; cornicle .80-.92; rostrum attaining nearly to 3d coxa. Hairs slightly 
capitate. Cauda tapering to slender point, bearing 2-3 pairs of lateral hairs and 2-3 dorsal 
ones. 
Alate Vivipara. Head and prothorax medium yellowish green; meso- and metathorax - 
pale yellowish brown; antenna black beyond base of III; cornicle black except base; tibiae 
black except pale area just beyond knees; cauda and anal and genital plates pale greenish. 
Body length 1.9; across eyes .45; antenna 3.6; hind tibia 2-2.20; rostrum attaining 2d coxa. 
Cauda slender, tapering, with slight tendency to constriction near base and bearing 2-3 pairs 
of long lateral hairs and 4-6 dorsal ones, mostly on distal third, some of hairs blunt to nearly 
capitate. 
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(1.00 — 1.10) i a 
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— te Tibia 1.95 Mi 
Fig. 352. Macrosiphum breviscriptum 
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(65-80 ee 
Ovipara. Apterous. Color and measurements same as in apterous vivipara except as fol- 
lows: Body slightly shorter, cauda bearing 10-12 dorsal hairs besides the 2-3 pairs of lateral 
ones and hind tibia proximal third of which is slightly swollen and rather sparsely covered 
with sensoria. 
Collections. On leaves and stems of Aster laevis var. geyeri, A. laevis, A. 
novi-belgi and A. sp. but not deforming or curling leaves. Colorado: Fort Col- 
lins and Cameron Pass. Alate and apterous viviparae June 22 to Oct. 1, oviparae 
Oct. 1; not common. 
Type. U.S.N.M., No. 51419. Paratypest Colo. Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Comparatively short reticulated area (.15) 
on cornicle, length of cauda (not shorter than .40 for entire length), long an- 
tenna (3.6) and number of sensoria on III (13-18 in aptera, 33-43 in alata). 
Macrosiphum californicum (Clarke) 
The California Willow Aphid 
Nectarophora californica Clarke, 1903 :254. 
Macrosiphum laevigatae Essig, 1911c:548; Gillette and Palmer, 1934:185. 
Macrosiphum californicum, Essig, 1917: 328 (synonymy). 
Apterous Summer Vivipara. Yellowish green, with darker green on median line and on 
lateral portions; antenna, beyond base of III, pale brown; legs, cornicle and rostrum pale with 
dusky tips; cauda.and anal plate pale. Body length 2.2-2.6, slender; hind tibia 1.80-2.55; 
