flEMIPTERA OF COLORADO. 123 



miiiiis (Cowen). 

 Hyalopteris priini Fab. 



Hotchkiss, July 6th, on plum and prune (Cowen) . 



Siphocoryne xanthii Oestl. 



Hotchkiss, July 26th, on underside of leaves of Xanthium 

 canadense( Cowen) . 



Myzus ribis L. 



Fort Collins, July 9th, on leaves and young shoots of Ribes 

 aureum (Cowen) . 



Rhopalosiphiivi dianthi Schrank. 



In college greenhouse, February 21st, on leaves and stems 

 of Calla Lily (Cowen). 



Rhopalosiphum nyniphaeae 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 juint, length of joints III OliO mm., 



IV 0.24 mm. Beak j.bout 0.55 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 O.ll mm. long. Honey tubes clavate, 0.35 mm. long. Style 

 about 0.13. mm. long." 



Fort Collins, September 15th, on Sagittaria variabilis 

 (Baker). This species is doubtfully referred to R. nyni- 

 phaeae, as a description of that species is not accessible. 



Nectarophora artemisiae Cowen n. sp.* 



"Winged viviparous female: Length 2 mm. Wing about 3.10 mm. long. Head and 

 tliorax bhick, abdomen somewliat lighter with the upper dorsum marlied with four 

 longitudinal rows of black spots. Antennae on distinct frontal tubercles, about ^.'.'O mm. 

 long, third joint with numerous small sensoria, length of joints III 65 mm., IV 0.55 mm., 



V 0.50 mm., VI 0.15 mm., VII 0.80 to 0.90 mm. Beak about reaching third coxae. Thorax 

 arched. Stigma dark, elongate. Honey tubes 0.55 mm. long. Style 0.20 mm. long and 

 curved upwards. Tarsi 0.20 mm. long." 



Estes Park, July 19th, on A^rtemisia tridentata (Gillette). 

 More Ax^his-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..f)0 mm. Head, prothorax, abdomen, and style uniform green. Mesothorax yellow, 

 appendages mostly dusky. Eyes brown black. Antennae longer than the body, third 

 joint with al out tenor twelve sensora in one row, leugtli of joints III 0.00 mm., IV 85mm., 

 V U.TO mm., \"I 0.20 mm., VII 1.10 mm. Beak black tipped, liardly re:iching the second 

 coxae, about 0.50 mm. long. Honey tul)es about 0.80 mm. long. Style long cylindrical. 

 Apter.)us viviparous female: Length 3 mm., to the tip of the style. Uniformly green, 

 eyes brownish-black, honey lubes and style of the same color as the abdomen. Antennae 



♦Description from alcoholic maleral. 



