120 
PRELIMINARY LIST 
Aphis gillettei Cowen n. sp. 
“Winged viviparous female: Length 1.T0 mm. . Antennal joints annulated, third joint 
tuberculate with numerous sensoria, joints III 0.514 to 0.516 mm., I\ 0.18 to 0.23 mm., \ 0.11 to 
0.12 mm., VII 0.23 to 0.30 mm. A frontal prominence between the antennae. Beak nearly 
reaching second coxae, about 0.45 mm. long. Antennae, head, thorax, and greatei portion 
of appendages black. Abdomen green, marked with transverse bars and with a marginal 
row of dots of deeper green or black, shafts of legs light. Lataral tubercle of pronotum 
small. Insertions of wings yellowish. Second branch of cubital nearer to apex than 
origin of first branch. Stigm i pointed. Honey tubes slightly enlarged at base, about 
0.35 mm. long. Style 0.12 mm. long. Tarsi 0.14 mm. Apterous viviparous female: 
Length 1.7J mm. Antennae about 1.10 mm. long. Pale green except eyes, tarsi, and tips 
of honey tubes, which are black. Dorsum with patches of darker gr sen. Body broad in 
proportion to the length. Ilcney tubes about 0.33 mm. long, cylindrical. Style 0 12 mm ” 
Fort Collins, Jane 22d, on Helianthus petiolaris (Gillette). 
Hotchkiss, Delta County, July 24th, on Helianthus sp. in 
small colonies on the under side of the leaves (Cowen). 
The same species was found on the under side of leaves of 
Amarantus retroflexus, in colonies of one winged and two 
or three small young, at Hotchkiss, Delta County, July 26th 
(Cowen). 
Aphis lieraclii Cowen n. sp. 
“Winged viviparous female : Length 1.40 to 1.50 mm. Head and thorax black, abdo¬ 
men yellowish green with some deeper green spots on the dorsum, causing the whole 
abdomen to appear deep green. Beak nearly reaching third coxae, 0.50 mm. long. Third 
joint of antennae tuberculate and with numerous small sensoria, all the joints annul¬ 
ated, the group of sensoria at apex of fifth joint conspicuously elevated, length of joints 
III 0 33 to 0.40 m n., IV 0 21 to 0.25 mm, V. 0.13 to 0 2) mu, VI 0.12, VII 0.27 to 0.31 mm. 
Thorax archei, lateral tubercle of promotum small. Second branch of cubital vein 
nearer to the apex o r ' the wing than to the origin of the first branch, Legs light except 
at the joints, length of tarsi 0.14 mm. Honey tubes 0.26 mm. long. Style 0.10 mm.” 
Fort Collins, July 9th in colonies in the umbels of 
Heracleum lanatum. A somewhat larger form of apparently 
the same species was found in the umbels of Pastinaca 
sativa at Fort Collins, July 28th. 
Aphis maidis Fitch. 
Fort Collins, September 14th on maize (Baker). Hotch¬ 
kiss, July 27th on all parts of maize (Cowen). 
Aphis mali Fab. 
Hotchkiss, August 23d, colonies of apterous and winged 
individuals on young leaves and shoots of apple (Cowen). 
Fort Collins, on apple (Gillette). 
Aphis meclicaginis Koch. 
Fort Collins, June 27th on Astragalus bisulcatus, prin¬ 
cipally in the racemes of flowers, and on Glycyrrhiza lepidota 
