HEMIPTERA OF COLORADO. 121 



(Cowen). This may be No. UOO of tlie Coster County List 

 (see Cockerell, 10). 



Aphis menthae-radicis Cowen u. sp. 



"Apterous viviparous femiile: Lonyili 2 mm. liead, thorax, and greater portion of 

 appendajjes black. Beak reacliing second coixe. Antennae about one millimeter long. 

 Til)iae and uppt^i portion of tlie l)oak wliite. Alidonien green, with a marginal row of 

 black spots and barred on the dorsum with black. Tliis Aphis appears to be of a dull lead 

 color unmagnifled. Honey tubes about as long as the tarsi, somewliat elongated at tlie 

 base. Sty:e short conical. Winged viviparcjus female: .'>ize somewliat 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. 'PhirJ joint of antennae with an irregular row of 

 sensoria, fourth and fifth joints with a sensori;i, length of joints III 0.3.5 to 0.30mm., IV0.14 

 to 0.17 mm., V iM3 to O.U mm., VI 0.1 1 to o.ll mm., V'lf 0.30 to 0.3,'). Lateral tubercle of pro- 

 notum very short. ?!eL'ond branch of cubital midway, length of the wing 3.30 to 3.60 mm. 

 Honey tubes about O.Li mm., slightly incrassate. Style short and conical " 



Hotchkiss, July 14th, on the roots of Mentha canadensis 

 and on the stems near the ground. 



Aphis oenotherae OestL 



Estes Park. July ISth on Oenothera biennis (Gillette). 

 Fort Collins, August 18tli on Oenothera Inennis (Baker). 

 Hotchkiss, July 27th, on Oenothera Inennis; Crawford, July 

 29th, on Oenothera caespitosa (Cowen). 

 Aphis oxyhaphi Oe.stl. 



Fort Collins, July 26th on stems of Oxybaphus angusti- 

 folius (Cowen). 

 Aphis nimicis L. 



Fort Collins, June 27th on liumex crispus; Hotchkiss, 

 July 21st on Rumex crispifs (Cowen). Very variable. 



Aphis salicola Thos. 



Fort Collins, June 2()th on young twigs of SmUx amygdal- 

 oides (Cowen). This may V)e No. 892 of the Custer County 

 List (Cockerell, 10). 



Aphis Valerianae Cowen n. sp.='= 



"Winged viviparous female: Length l.st-l.iio mm. Body black. Thi,-d to fifth joints of 

 the antennae with numerous irregular warty sensoria, length of joints I II 0.3!'., IVO 34.. mm. 

 V 0.31 mm., VI 0.18 mm., VII 0.r2-'J.21 mm. Beak nearly reacliiiig the third coxae. Lateral 

 tubercle of the pronotum prominent. Tarsi about O.I.) mm. Honey tubes about 01'.' n:m. 

 Style go:) 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 



