SUBFAMILY APHINAE 333 
Apterous Sexupara (?). Body length 1.5; across eyes .38-.43; antenna 2.1; hind tibia 
.82-1.08; cornicle .40-.55. 
Alate Vivipara. Same as aptera except entire antenna and thorax dark. Body length 1.6; 
across eyes .38; antenna 2.15; hind tibia .92; rostrum attaining 3d coxa. Cauda rather slender, 
somewhat spatulate, bearing 4 pairs of lateral hairs and one preapical one. 
Ovipara. Apterous. About the same as apterous vivipara except 7-8 sensoria on III and 
hind tibia swollen and bearing sensoria. 
Male. Alate. Same as alate vivipara. Body length 1.64; antenna 2.3, sensoria numerous 
on III, IV and V; hind tibia 1.25. 
Collections. On Artemisia tridentata and “short sage.” Utah: Cedar Creek, 
Cedar Breaks, Kelton, Monte Cristo, Woodruff, Logan Canyon and Spring Hol- 
low. Apterous viviparae July 18 to 26, apterous sexuparae (?) Aug. 8 to 25, alate 
viviparae Aug. 25, sexuales Oct. 24; rather common. 
Type. M. toti and paratypes of toti and zerothermum, Knowlton Collection. 
Chief Distinguishing Characters. Rather weak frontal tubercles, pointed to 
blunt hairs, length of unguis (longer than the cornicle and coequal with III, 
varying from shorter to considerably longer), length of the cornicle (.40-.53 in 
aptera, .30 in alata). 
Macrosiphum zerozalphum Knowlton 
Macrosiphum zerozalphum Knowlton, (Sept.) 1935d:194 and 1936:213. 
Apterous Summer Vivipara. ‘‘Yellow-green.” (Mounted on slide), antennal VI and base 
of V, tarsi and tips of tibiae dusky; cauda pale to dusky; cornicle pale with dusky tip. Body 
surface rugulose. Body length 2.2-‘'2.85”; across eyes .48-.50; antenna 2.5-2.8; hind tibia 
1.5-“1.8"’; rostrum attaining 2d coxa. Cauda nearly parallel-sided, bearing 3-4 pairs of lateral 
hairs and a single preapical one. 
Alate Vivipara. ‘‘Yellow-green.”’ (Mounted on slide), antenna beyond base of III, tarsi 
and tips of tibiae blackish; cauda and tip of cornicle slightly dusky. Body length 2-‘2.31”; 
across eyes .43-.47; antenna 2.60-2.77; hind tibia 1.55-1.75. Hairs on body .01 and very sparse; 
without dark area at bases. 
SS) 
atid: 
Fig. 400. Macrosiphum zerozalphum 
Collections. On Erodium cicutarium. Utah: Uintah Mountains, Bountiful, 
Brighton, Deweyville, Leeds, Mamott, Penrose and Ogden. Apterous vivipara 
April 25 to June 25, alate viviparae April 25 to May 2; apparently rare. 
Type: Knowlton collection or U.S.N.M. 
Chief Distinguishing Characters. Lack of reticulation on cornicle, length of 
unguis (from .80-1.16 times the length of III), short to medium cauda of aptera 
(.30-.35) with 3-4 pairs of lateral hairs, immaculate green body, length of rostral 
IV+V (about the same as hind tarsal II) and number of hairs on rostral IV-++-V 
(not numerous), hairs on cauda (not more than 4 on each side) and their ab- 
sence on cornicle. 
This form is distinguished from M. pelargonii only by ratio of unguis to III. 
Determination of status of this species was aided by specimens of M. pelar- 
gonii determined by Hille Ris Lambers. 
