120 PRELIMINARY LIST 



Ajjliis gillettei Cowen u. sp. 



"Winged vivipjirous female: Lt;ii;rth l.'i'O mm. Aiiteniial .ioiiits unnulatecl, tliird joint 

 tuberculate witli numerous sensoria. .joinls HI (i.o4 to O.IjS mm , I^' U.IS to 23 mm., V 0.11 to 

 0.13 mm . V[[ 3:^ to :iO mm. A fronta 1 prominence bei ween tlie antennae. Ueak nearly 

 reaciiing second co.vae, aljont (1.4-') mm lonu-. Antennae, head, tliora.x, and greater portion 

 of appendage.s black. Abdomen sireen, marked witli transverse bars and with a marginal 

 row of dots of deeper green or black, shafts of legs litrht. Lataral tubercle of prouoium 

 small. Insertions of wings yellowisli. Second branch of cubital nearer to ape.x than 

 origin of Hrst branch. Scigm i pointed. Honey tubi\s slightly enlarged at base, about 

 0.35 mm. long. Style 0.12 mm long. Tarsi 0.14 m:ii. Apterous viviparous female : 

 Length 1.7) mm. Antennae about 1. 10 mm. loug. l\iie green except eyes, tarsi, and tips 

 of honey tubes, which are black. Dorsum with patches of darker gr hmi. Body broad in 

 propoition to tue length. Hcney tubes about 3i m n loag, cylln Irijal. Style 13 mm" 



Fort Collins, Jane 221, on Hslianfchiis patiolari.s (Gillette). 

 Hotchkiss, Delta Coiinl}-, 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 thi-ee small young, at H )fcr'.likiss, Dalta County, July 26th 

 (Cowen). 



Aphis heraolii Cowen n. sp. 



"Winged viviparous female : Length 1 4ii to l.oi) mm. Head and thora.v black, abdo- 

 men yellowisli green witli some deeper green spots on the dorsum, causing the wliole 

 abdomen to appear deep green. Beak nearly reaching tliird co.\"ae, 0.50 mm. long. Third 

 .ioinr, of antennae tuberculate and with nuraerom sm i,U sensoria, all the joints annul- 

 ated. the group of sensoria at ape.x of tifth joint conspiniousl v elev.ited, length of joints 

 III 0.35 to 0.40 mm.. IV 0.21 to 0.33 mm , V. o.lJ to 0.20 mm , VI Q.li, VII 037 to 0.31 mm. 

 Thora.x arehe t, lateral tuoerLjle o' pro.-noDum sniil. Second branch of ciihital vein 

 nearer to the apex o' the wing than to the origin of the first branch. Legs light except 

 at the joints, length of tarsi 0.14 mm. Honey tul)As 0.36 mm. long. Style O.lii 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 2Sth. 



Aphis inaidis Fitch. 



Fort Collins, September 14th on maize (Baker). Hotch- 

 kiss, July 27th on all parts of maize (Cowen). 



Aphis iiiali Fab. 



Hotchkiss, August 23d, colonies of apterous and winged 

 individuals on youug leaves and shoots of apple (Cowen). 

 Fort Collins, on apple (Gillette). 



Aphis inedicaginis Koch. 



Fort Collins, June 27th on Astragalus bisulcatus, prin- 

 cipally in the racemes of flowers, andonGlycyrrhiza lepidota 



