112 APHIDS OF THE ROCKY MOUNTAIN REGION 
Ovipara. Apterous. Same as apterous vivipara except body length which is 3.50 with 
terminal segments somewhat drawn out to form ovipositor and hind tibia which is somewhat 
swollen on proximal six-tenths and bearing scattered sensoria along eight-tenths of length. 
Egg. Newly laid, honey-yellow; later, black; naked. 
Collections. On roots of Salix laevigata. Colorado: Fort Collins and 
Boulder. Apterous summer viviparae June 4 to Sept. 24, alate viviparae June 
10 to Sept. 7, oviparae Oct. 18 to Nov. 4; rather rare. 
Cotypes. Essig and Colo. Agr. Exp. Sta. Collections. 
Tribe Setaphini n.n. 
Setaphidini Baker, 1920a:38. 
Characters. Same as in Setaphis van der Goot, the only genus. 
Genus Setaphis van der Goot 
Van der Goot, 1916:153; Baker 1920a:39. 
Characters. Frontal tubercles rudimentary; antenna five-segmented; un- 
guis of VI shorter than base; secondary sensoria small, circular. Eye three- 
facetted in aptera. Abdomen bearing a pair of dorsal, fingerlike tubercles 
situated on VII. Hairs inconspicuous, simple. Cornicle a mere pore situated on 
a low, broad cone, devoid of hairs. Cauda and anal plate rounded. Fore wing 
with media once-branched; hind wing much reduced, devoid of cross-veins. 
Gonopophyses 3. 
Genotype (fixed by van der Goot, 1916), Setaphis luteus van der Goot. 
Setaphis viridis van der Goot 
Setaphis viridis van der Goot, 1916:158. 
Alate Vivipara. (Mounted, partly cleared), head and thorax, antenna, posterior dorsal 
tubercles, cornicle and legs dark; veins of both wings bordered. Body length more than 1.20 
(uncertain on account of shrivelled body); across eyes .35; antenna 1.03; hind tibia .53; hind 
tarsal II .12; rostrum attaining 2d coxa. A pair of dorsal tubercles prolonged into hornlike 
structures on abdomen posterior to cornicles. Cauda rudimentary, rounded; anal plate rounded. 
bottg Dorsal 
RSL RIC ANC Amt ek VS BOAT PA CA SPANUUTIAE nce roken A 
sen. 32 20) Se@t4 6 2. Colt; ine, Net oes 
(OTe CRRRR Fans 
ie a 04 wz =. 
Hd. Tb. d.Tb. ee Oe es 
09 
Fig. 123. Setaphis viridis 
Collections. On Hibiscus (?). Colorado: Colorado Springs. A single alate 
vivipara June 13; rare. Probably imported on another host. 
Tribe Aphini Gillette and Palmer 
Aphidini Thomas, 1877:3. 
Aphini Gillette and Palmer, 1932b:369. 
Characters. Frontal tubercles more or less developed medially. Secondary 
sensoria circular or oval. Antenna longer than half of body, unguis filamentous. 
Ocular tubercle present. Hairs inconspicuous. Wax secretion rare. Cornicle 
usually elongated, rarely a mere pore or absent, very rarely truncate. Cauda 
short to elongated. Rostrum four-segmented, V indistinct (fused with IV). 
Fore wing with radial sector curved and distinct. Tarsal I triangular in lateral 
aspect. 
Key to Subtribes of Aphini Gillette and Palmer 
1, Head without prominent frontal tubercles, rarely exceeding vertex; cornicle 
never longer than 4 times hind tarsus, never reticulated (p. 113) ............:.::c::c:ccceeeeeeee= Aphina 
Head usually with prominent frontal tubercles, exceeding vertex; cornicle 
usually longer than 4 times hind tarsus, often reticulated (p. 229)...........-..---- Macrosiphina 
