20 Thomas Albert Williams 



ish. Antennae similar to those of Schizoneura americana; III longer than 

 IV, V and VI together. Beak reaching hind coxae or abdomen. Wings 

 hyaline, with slender veins; cubital of fore wings distinct for its entire 

 length, though often very slender, branching about midway. In other 

 respects the wings are similar to Sch. americana. Legs and tarsi some- 

 what shorter. Honey tubes are circular openings but slightly raised above 

 the surface of the abdomen. Not flocculent as in apterous but only pul- 

 verulent. Expanse of wings 6 mm. 



Found on the under side of twigs and young branches of haw- 

 thorn {Crataegus tomentosa and C. punctata). West Point, July 

 29, 1890. As only one winged specimen was found and that in a 

 bad condition for description I give Oestlund's description of 

 that form. 



Specimens in collection of the University of Nebraska (no. 

 17) and of the U. S. National Museum (no. 72). 



16. Schizoneura lanigera Hausman. 



Specimens from roots of apple in collection of the University 

 of Nebraska (nos. 18, 19). 



17. Schizoneura rileyi Thomas. 



Riley, Ins. Mo., 1st Rep., p. 123 (1868). Eriosoma idmi. 



Thomas, Ins. 111., 8th Rep., p. 136 (1879). Schizoneura rileyi. 



Riley, Gen'l Ind. Supp. Mo. Rep., p. 87 (1881). Schizoneura rileyi. 

 Stem-mother: Subglobose, rather large, pale green to reddish yellow. 

 Antennae 5-jointed, dusky brown. Legs and coxae brown. Head and 

 anal plates blackish brown. Beak reaching middle coxae, brownish. Eyes 

 small, but distinct, black. Length of body 3 mm., width 2.05 mm. 



Pupa varying from pale pinkish to purplish brown. Legs and antennae 

 concolorous. Eyes pale to dark red. 



Winged viviparous female: Color light brown to dark purplish brown. 

 Head and thorax darker. Eyes dark red to almost black. Antennae and 

 legs concolorus with body. Antennae 6-jointed, with III longer than any 

 two of the remaining joints taken together, cylindrical; IV, V and VI 

 club-shaped, subequal, or VI the shortest; not annulated as in Sch. ameri- 

 cana. Wings with heavy blackish subcostal; oblique veins slender, brown- 

 ish to black ; cubital distinct for its entire length and with a fork about 

 one third as long as the vein itself, which curves in an opposite direction 

 to the stigmal vein. Stigma short and broad, dusky with posterior margin 

 blackish. Length of body 2-2.10 mm., to tip of wings 2.50-2.75 mm. 



On small branch of elm (Ulmus americana), causing an elon- 

 gated swelling. Ashland, September, 1889. On the same kind 



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