HEMIPTERA OF COLORADO. 
121 
(Cowen). This may be No. 900 of the Custer County List 
(see Cockerell, 10). 
Aphis menthae-radicis Cowen n. sp. 
“Apterous viviparous female: Length 2 mm. Head, thorax, and greater portion of 
appendages black. Beak reaching second coaxe. Antennae about one millimeter long. 
Tibiae and uppei portion of the beak white. Abdomen green, with a marginal row of 
black spots and barred on the dorsum with black. This Aphis appears to be of a dull lead 
color unmagnified. Honey tubes about as long as the tarsi, somewhat elongated at the 
base. Style short conical. Winged viviparous female: Size somewhat smaller than in 
the apterous form. Of the same color and marking except that it is not so heavily barred 
and dotted with black on the dorsum. Third joint of antennae with an irregular row of 
sensoria, fourth and fifth joints with a sensoria, length of joints III 0.25 to 0.30 mm., IV 0.14 
to 0.17 mm., V 0.13 to 0.14 mm., VI 0.10 to 0.11 mm., VII 0.20 to 0.25. Lateral tubercle of pro- 
notum very short. Second branch of cubital midway, length of the wing 2.30 to 2.60 mm. 
Honey tubes about 0.15 mm., slightly incrassate. Style short and conical ” 
Hotchkiss, July 14th, on the roots of Mentha canadensis 
and on the stems near the ground. 
Aphis oenotlierae Oestl. 
Estes Park, July 18th on Oenothera biennis (Gillette). 
Fort Collins, August 13th on Oenothera biennis (Baker). 
Hotchkiss, July 27th, on Oenothera biennis; Crawford, July 
29th, on Oenothera caespitosa (Cowen). 
Aphis oxybaphi Oestl. 
Fort Collins, July 26th on steins of Oxybaphus angusti- 
folius (Cowen). 
Aphis rumicis L. 
Fort Collins, June 27th on Rumex crispus; Hotchkiss, 
July 21st on Rumex crispus (Cowen). Very variable. 
Aphis salicola Thos. 
Fort Collins, June 20th on young twigs of Salix amygdal- 
oides (Cowen). This may be No. 892 of the Custer County 
List (Cockerell, 10). 
Aphis Valerianae Cowen n. sp * 
“Winged viviparous female: Length 1.80-1.90 mm. Body black. Third to fifth joints of 
the antennae with numerous irregular warty sensoria, length of joints III 0.39., IV 0.24., mm. 
V 0.21 mm., VI 0.18 mm., VII 0.12-0.21 mm. Beak nearly reaching the third coxae. Lateral 
tubercle of the pronotum prominent. Tarsi about 0.15 mm. Honey tubes about 0.19 mm. 
Style 0 09 mm. Apterous female: Black; younger, half grown, with about six pairs of 
white circular spots on the dorsum.” 
Foot-hills five miles west of Fort Collins, July 19th, on 
stalks of Valeriana edulis (Cowen). 
^Measurements from specimens preserved in alcohol. 
