The Aphididae of Nebraska 81 



104. Siphonophora grindeliae n. sp. 



Apterous viviparous female: Pale pea green, no darker markings on 

 the body. Eyes dark red. Antennae all pale, about the length of the 

 body, III longest, IV and VII subequal. Beak only reaching to middle 

 coxae. Legs all pale but tips of tarsi. Honey tubes long, reaching beyond 

 the tip of the abdomen, slightly swollen just below the tip, pale green. 

 Tail robust, about one third of the honey tubes in length, obtuse, hairy. 

 The embryos can be seen very plainly in the abdomen of the female ; their 

 eyes appear almost black. 



Pupa: Color as in the apterous form, but the antennae shorter than the 

 body, with the tips of each joint and all of VI and VII dusky and VII 

 as long as or slightly longer than III. Beak not reaching to middle coxae. 

 Legs with the tarsi and tibial tips dusky. Wing-pads and thorax darker 

 green. Honey tubes as in above. Tail short and conical. 



Winged viviparous female: Color, eyes and tail as in apterous form. 

 The honey tubes similar except that they are dusky toward the tip. An- 

 tennae longer than the body, blackish, pale at base ; III longest and with 

 sensoria. Beak only reaching to or slightly beyond the middle coxae. 

 Legs pale, with dusky tibial tips and tarsi. Wings with slender brownish 

 veins, subcostal pale yellowish ; stigma grayish ; cubital with branches 

 varying. Stigmal vein sharply curved for the first half, then straight or 

 slightly recurved. Length of body 2.55 mm., to tip of wings 4.40 mm., 

 honey tubes 0.70 mm. 



This is between Siphonophora rubi and 5". pelargonii, having 

 the size of the latter and the honey tubes of the former, and sim- 

 ilar to both in color. It is similar in appearance to S. pisi, but 

 differs in honey tubes and antennae as well as in the thoracic 

 coloration. 



On Grind elia sqnarrosa. Lincoln, May, 1889, and June, 1890. 



Cotypes in the collection of the University of Nebraska (no. 

 142) and of the U. S. National Museum (no. 396). 



105. Siphonophora ludovicianae Oestlund. 

 Oestlund, List Aph. Minn., p. 23 (1886). 

 Oestlund, Syn. Aph. Minn., p. 80 (1887). 



Apterous viviparous female: Yellowish green, pulverulent. Eyes bright 

 red. Antennae on large frontal tubercles, longer than body, black, with 

 paler base ; III and VII subequal in length, the former with a few sensoria. 

 Beak reaching hind coxae, only the last joint black, acute. Legs black, 

 with proximal two thirds of femora yellowish. Honey tubes black, pale 

 at base, 0.55 mm. long. Tail robust, upcurved, almost as long as honey 

 tubes, yellow. Length of body 2.80 mm. 



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