HEMIPTERA OF COLORADO 
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munis (Cowen). 
Hyalopteris priiiii Fab. 
Hotchkiss, July 6tli, on plum and prune (Cowen). 
Siphocoryne xanthii Oestl. 
Hotchkiss, July 26th, on underside of leaves of Xanthium 
canadense( Cowen). 
Myzns rihis L. 
Fort Collins, July 9th, on leaves and young shoots of Ribes 
aureum (Cowen). 
Rhopalosiphiim dianthi Schrank. 
In college greenhouse, February 21st, on leaves and stems 
of Calla Lily (Cowen). 
Rhopalosiphiim nyinphaeae L.* V 
“Winged viviparous female: Length 2.20 mm. Length of wing 3.10 mm. Head and 
thorax dark, abdomen lighter. Antennae on short frontal tubercles, third joint with 
numerous irregular sensoria, no sensoria on the fourth joint, length of joints III 0.30 mm., 
IV 0.24 mm. Beak about 0.66 mm. long. Lateral tubercle of pronotum small. Stigma 
elongate, widest at the base of the stigmatal vein. The second branch of the cubital near 
the apex of the wing. Tarsi 0.14 mm. long. Honey tubes clavate, 0.36 mm. long. Style 
about 0.13. mm. long.” 
Fort Collins, September 15th, on Sagittaria variabilis 
(Baker). This species is doubtfully referred to R. nym- 
phaeae, as a description of that species is not accessible. 
Nectarophora arteinisiae Cowen n. sp.* 
“Winged viviparous female: Length 2 mm. Wing about 3.10 mm. long. Head and 
thorax black, abdomen somewhat lighter with the upper dorsum marked with four 
longitudinal rows of black spots. Antennae on distinct frontal tubercles, about 2.90 mm. 
long, third joint with numerous small sensoria, length of joints III 0.66 mm., IV 0.66 mm., 
V 0.60 mm., VI 0.16 mm., VII 0.80 to 0.90 mm. Beak about reaching third coxae. Thorax 
arched. Stigma dark, elonsate. Honey tubes 0.66 mm. long. Style 0.20 mm. long and 
curved upwards. Tarsi 0.20 mm. long.” 
Estes Park, July 19th, on Artemisia tridentata (Gillette). 
More Aphis-like than most members of this genus. 
Nectarophora asclepiadis Cowen n. sp. 
“Winged viviparous female: Length 3.20 mm., to the tip of the style. Length of wing 
4..50 mm. Head, prothorax, abdomen, and style uniform green. Mesothorax yellow, 
appendages mostly dusky. Eyes brown black. Antennae longer than the body, third 
joint with about ten or twelve sensora in one row, length of joints III 0.90 mm., IV 0 86 mm., 
V 0.70 rnm., VI 0.20 mm., VII 1.10 mm. Beak black tipped, hardly reaching the second 
coxae, about 0.60 mm. long. Honey tubes about 0.80 mm. long. Style long cylindrical. 
Apterous viviparous female: Length 3 mm., to the tip of the style. Uniformly green, 
eyes brownish-black, honey tubes and style of the same color as the abdomen. Antennae 
♦Description from alcoholic materal. 
