56 APHIDS OF THE ROCKY MOUNTAIN REGION 
Genus Stomaphis Walker 
Walker, 1870:2000; Baker, 1920a:18. : 
Characters. Rostrum much longer than body, V distinct. Tarsi rather stout, 
T nearly triangular in Jateral aspect. Fore wing with radial sector somewhat 
curved; media twice-branched. Antenna six-segmented. Cornicle on broad 
hairy cone. Hind wing with media and cubitus widely separated. Ocular tu- 
bercle distinct. Male apterous with rudimentary mouth-parts. 
Genotype (fixed by Walker 1870:2000), Aphis quercus Linnaeus. 
Collections. On Pinus ponderosa var. scopulorum, on roots. Colorado: 
Poudre Canyon. A single nymph June 16. (Determination of species impos- 
sible.) 
Subtribe Tramina Baker 
Baker, 1920a:19. : 
Characters. Hind tarsal II at least half as long as tibia; segment I minute, 
almost triangular in lateral aspect. Rostrum obtuse; segment V distinct but 
minute. Fore wing with radial sector more or less curved. Cornicle inconspicu- 
ous, mere rim or pore or apparently absent. Cauda semilunar; anal plate entire. 
Living on roots of plants and in nests of ants. 
Only one genus represented in region. 
Genus Trama Heyden 
Heyden, 1837:293; Baker, 1920a:19. ; 
Characters. As given for tribe. Unguis much shorter than base of VI. Eye 
small especially in aptera. Hairs fine, pointed, numerous. 
Genotype (monotypical), Trama troglodytes Heyden. 
Key to Species of Trama 
1. Hind tarsus half to four-fifths of length of tibia; eye in aptera of few facets only; 
cornicle-evident: in‘ alata (i057) io. ce see eee troglodytes 
Hind tarsus nine-tenths of length of tibia; eye in aptera of 15 facets or more; 
cornicle not evident in alata (15456) sss-Ro Aeris cote hoatiansasot cocatiesice fe rara 
Trama rara Mordvilko 
The Long-footed Dandelion Aphid 
Fig. 55. Trama rara 
Trama rara Mordvilko, 1908:373 and 1935:275 and 277 (synonymy with oculata Gillette 
and Palmer declared). 
Trama oculata Gillette and Palmer, 1930:547 and 1931:881. 
Apterous Vivipara. Pale whitish in younger, to olive-brown in older examples; legs yel- 
lowish with entire tarsi of Ist and 2d pairs dusky, of 3d pair dusky distally only; antenna 
brownish yellow, dusky distally; rostrum dusky. Body length 3; hind tibia 1; antenna 1.50, 
primary sensorium long and flat, secondary sensoria fiat, indistinct, irregularly shaped and 
scattered; cornicle not evident; rostrum attaining middle of abdomen. Hairs pointed, fine, 
numerous, drooping, about .03 long on antenna and hind tibia, length equalling about half of 
diameter of segment bearing them. 
Alate Vivipara. Same in color and measurements as aptera or slightly smaller. 
Collections. On Taraxacum officinaie, on roots and under stone in ants’ 
nests. Colorado: Foothills near Masonville, Longmont and Fort Collins. Ap- 
terous viviparae outdoors Feb. 23 to Nov. 6 and in greenhouse Jan. 18, alate 
viviparae Nov. 6 and in greenhouse Jan. 18. 
