192 APHIDS OF THE ROCKY MOUNTAIN REGION 
antenna .70-.80, secondary sensoria arranged in irregular row on III. Hairs pointed, very 
sparse. Cornicle merely slightly raised pore located on abdominal VI. Cauda tapering, acute, 
bearing 2-3 hairs on each side and a single preapical one, Lateral tubercles not evident. 
Tarsal II long and slender. Fore wing with radial sector nearly straight. 
Ovipara. Apterous. Same as apterous vivipara except that hind tibia is slightly swollen 
and bearing a few inconspicuous sensoria. 
Male. Apterous. More yellow and less powdery than the females. Body length 1.10, 
width .40; length of antenna same or shorter than in apterous vivipara; hind tibia .40. 
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Fig. 222. Brachycolus tritici 
Collections. On leaves of wheat (Triticum vulgare) and Agropyron sp. 
Colorado: Boulder and Fort Collins. Apterous summer viviparae May 5 to Oct. 
12, alate viviparae May 12 to July 18, sexuales Oct. 12; rather rare. 
Type. U.S.N.M., No. 41934. Paratypes, Colo. Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Slender rostral IV+V .12 long, attaining 
2d coxa and rather slender tapering cauda, twice as long as wide. 
Genus Braggia Gillette and Palmer 
Gillette and Palmer, 1929a:28 and 1932b:461. 
Characters. Vertex slightly rounded; frontal tubercles but slightly devel- 
oped. Antenna six-segmented; short, about half as long as body, unguis about 
same length as base of VI. Cornicle tapering with wide flange. Cauda broadly 
semi-circular to triangular resembling a body segment. Hairs on body heavy, 
spinelike or cylindrical and blunt, most conspicuous in life. Other characters as 
in genus Aphis. 
Chief Distinguishing Characters. Heavy blunt hairs and peculiar, broad, 
semicircular cauda resembling that of nymph. 
Genotype (monotypical), Braggia echinata Gillette and Palmer. 
Key to Species of Braggia 
i; Body hairs blunt, cylindrical; heavy, .03=.04 lone, (ps 192) sees ee echinata 
Body hairs sharp to slightly blunt, .06-.07 long (p. 193).............-::.:0c2-ceee0e-2- uncom pahgrensis 
Genotype Braggia echinata Gillette and Palmer 
(Plate V, 12-15) 
Braggia echinata Gillette and Palmer, 1929a:29 and 1932b:462. 
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Fig. 223. Braggia echinata 
Apterous Summer Vivipara. Grayish olive-green usually with slight rusty area at base 
of each cornicle; dorsufn of body covered with pattern of reticulation marked with white 
secretion and bearing heavy, blunt, white hairs which give a frosted appearance in life; 
appendages pale proximally, dusky distally; cauda and anal plate pale; genital plate slightly 
dusky. Body length 1.87; hind tibia .50-.55; hind tarsal II .09; antenna .70, secondary sensoria 
irregular in size. 
