124 PREJJMINARY LIST 



about O.80 mm. long, witli ;i few short c-Mpita-to li;urs, and a, fow seiisoi'ia on tlio third joint. 

 Beak reaching tlie second coxae, tip I)lacl<. Legs iind antennae duslvv. Stile long and 

 falchion sharp " 



Hotchki-s, July 24th, in small colonies on underside of 

 leaves of Asclepias speciosa (Cowenj. 



Nectarophora erigeronensis Thos. 



Fort Collins, July 22d, on Lactuca pulcbella (Cowen) . 



Nectarophora rosae L. 



Estes Park, July 16th, on ro>e (Gillette). 



Nectarophora riidbeckiae Fitch. 



Fort Collins, July ISth, on Solidago ; Hotchkiss, on an 

 unknown composite (Cowen). No. 81)6 of the Custer County 

 list may helonjj; here (see Cockerell, 10). 



Nectarophora sp. 



"Winged viviparous female: Length 2.50 mm. To tlie tip of the wings 4.75 mm. Color 

 .green, thorax yellowish. Third .iolnt of antennae with a slight row of sensoria, remaining 

 .joints smooth except for a few short liairs, seventh .joint annulated, length of .ioints III 

 0.62 mm., IV 0.48 mm., V 50 mm., VI 0.10 mm, VI 1 100 nvii. Stigma short and broad. 

 Honey tubes imbricated, cylindrical, 0.35 mm. long. Style 0.15 mm. long. Apterous vivip- 

 arous female: Length about 3.5 mm. Mostly green. The eyes, ends of .ioints of anten- 

 nae, tip of beak, and tarsi, black. Lower ends of femora, and tips of iioney tubes darker 

 than the body." 



Fort Collins, July 21st, on Gaura parvitiora (Cowen). 

 Nectarophora sp. 



"Only wingless individuals, singly, or in small colonies. Wholly green, except that 

 the eyes, tarsi, and ends of .joints of antennae are black. Antennae longer than tlie 

 liody.' 



Horsetooth Mountain, July 23d on Arctostaphylos uva-ursi 

 (Cowen) . 



Nectarophora sp.* 



"Winged viviparous female: Length 2.70 mm. Color apparently uniform green. 

 Stigma elongate, sharp pointed. Apterous female: Length 3.20 mm. Antennae longer 

 than the body. Beak short, not reaching the second coxae. Honey tubes about 1.00 mm. 

 long. Style 0.45 mm. long." 



Estes Park, July 16th on Epilo])ium spicatum (Gillette). 



Nectarophora sp.* 



"Winged viviparous female: Length 2.20-2.40 mm. Wing about 3.40 mm. long, 

 uniformly pale, perhaps green, in life. Beak short, about reaching second' coxae. Third 

 joint of antennae with a number of round sensoria, length of .joints III (\60 mm., IV 0.48 

 mm., V 043 mm., VI O.IG mm. First branch of the cubital clnser than usual to the origin 

 of the cubital. Honey tubes 0.65 mm. long. Style about 0.25 mm. long." 



*Descriptions from alcoholic material. 



