246 APHIDS OF THE ROCKY MOUNTAIN REGION 
Collections. On Rubus parviflora. Utah: Ogden. Alate vivipara June 4; 
rare. 
Chief Distinguishing Characters. Length of antenna (4), absence of sensoria 
on IV and V of alate vivipara, length of cornicle (about .60, not distinctly shorter 
than III or unguis), shape of cornicle (moderately swollen), sculpture of cornicle 
and length of rostrum (attaining abdominal III). 
From A. davidsoni Mason it differs only in the shorter area of reticulation 
on the cornicle (.05 instead of .09). 
7-§ 
As 
4 
" 
Ol 
a 
Fig. 292. Amphorophora utahensis 
Genus Artemisaphis Knowlton 
Knowlton and Roberts, 1947c:27. 
Characters. Frontal tubercles not or only slightly exceeding vertex; an- 
tennal I thickened and somewhat gibbous; secondary sensoria round. Cornicle 
cylindrical to tapering and reticulated at tip. Cauda narrow, tapering, not 
twisted or crenate, with 2 lateral pairs of long hairs near base and another pair 
near tip. Anal plate with ventral, median, wartlike protuberance. Fore wing 
with media twice-branched; hind wing with both cross-veins. 
Genotype (monotypical), Aphis artemisicola Williams. 
This genus is distinguished from Bipersona Hottes, which it closely re- 
sembles, by the shape of the cauda which is not crenated so as to give twisted 
appearance and by the shape of the frontal tubercles which are not markedly 
exceeding vertex. 
Artemisaphis artemisicola (Williams) 
Aphis artemisicola Williams, 1910:37; Davis, 1911b:8; Gillette and Palmer, 1928:14 
and 1932b:381. 
Apterous Summer Vivipara. Reddish vinaceous black, shining; appendages brownish to 
blackish; cornicle black; cauda brown. Body length 2, robust; antenna 1.75; hind tibia 1-1.1; 
rostral IV+V tapering, attaining between 2d and 3d coxae, tip beyond hairs needlelike in 
ventral view, resembling a distinct segment V. 
Alate Vivipara. Color same as apterous vivipara. Body length 2; antenna 2-2.50, sec- 
ondary sensoria tuberculate; other measurements as in aptera. Hairs pointed; on body .05 
long, fine and sparse. Cornicle with 1-3 fine hairs usually evident, cauda bearing 2-3 pairs of 
curved hairs and sometimes one dorsomedian, heavy, blunt, spinelike hair evident. Anal plate 
with median wartlike protuberance, projecting ventrally not posteriorly. 
fe) 2 9 ) 1 
138 —A\? ft ZR 33 
Side view of tip of Abdomen 
lavage > 
Ane/ plate-= No 
Gone papauweeee ie oo 
Ti 
Genita/ plat 
: AapesWouwinngeuuus ee 
o $3.80 eee 
Fig. 293. Artemisaphis artemisicola 
Collections. On leaves and stems of Artemisia aromatica, A. cana, A. 
longifolia, and A. tridentata. Throughout region. Apterous summer viviparae 
June 22 to Aug. 22, alate viviparae July 11; very abundant on infested plants. 
