492 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 3 



branching at one third the distance from the tip of the wing to where the third 

 branches (PI. 32, fig. 17). Legs pale brownish, excepting the distal ends of femora, 

 tibiae and all of tarsi which are blackish. Thoracic tubercle prominent. Smaller 

 but similar tubercles along the sides of the abdomen. Cornicles black, cylindri- 

 cal, and nearly one half longer than style (PI. 32, fig. 18). Style black (PI. 32, fig. 19). 



Measurements. — - (From specimens mounted in balsam.) Length of body, 1.2- 

 1.59 mm., average, 1.39 mm.; width, 0.58-0.83 mm., avg. 0.64 mm.; length of 

 wing, 2.1 mm.; width, 0.87 mm.; antenna, I, 0.057; II, 0.049; III, 0.179-0.260, 

 avg. 0.216; IV, 0.131-0.195; avg. 0.160; V, 0.138-0.180, avg. 0.161; VI, base, 

 0.0815-0.114, avg. 0.098; VI, filament, 0.228-0.293, avg. 0.280; avg. total, 1.101 

 mm.; length of cornicles, 0.17-0.24 mm., avg. 0.205 mm.; style, 0.105-0.16 mm., 

 avg. 0.14 mm.; hind tarsus, 0.10 mm. 



Wingless viviparous female. — Body pale green, head dusky. Eyes black. An- 

 tennae with segments I and II dusky. III, IV, and basal half of V pale, end of V and 

 all of VI blackish; relative lengths of segments as in winged form.^ (PI. 32, fig. 15). 

 Legs pale greenish white excepting joints, distal end of tibiae, and all of tarsi which 

 are blackish. Thoracic and abdominal tubercles as in winged. Cornicles black, 

 very slightly narrowing towards the tip. Style black. 



Measurements. — Length of body, 1.39 mm.; width, 0.85 mm.; antenna, I, 0.057; 

 II, 0.049; III, 0.20-0.29, avg. 0.24; IV, 0.13-0.24, avg. 0.17; V, 0.14-0.21, avg. 

 0.17; VI, base, 0.098; VI, filament, 0.235-0.277, avg. 0.255; avg. total, 1.039 mm.; 

 cornicles, 0.305 mm.; style, 0.175 mm.; hind tarsus, 0.115 mm. 



The winged male may be recognized by the numerous sensoria on segments III, 

 IV, and VI base, of the antennae; by its smaller size; and the greenish brown abdo- 

 men. 



The wingless oviparous female is pale greenish yellow to yellow and the hind tibiae 

 are swollen and bear many sensoria. 



'^A. sijmphoricarpi Thos.: 8th Rep. State Ent. 111. (1880), p. 99; 

 Oestlund, Bull; Geol. and Nat. Hist. Surv. Minn. No. 4 (1887)„ p. 50. 

 I have frequently searched for this species in Chicago and vicinity 

 without success. There is no record of its occurrence in Illinois other 

 than in Hunter's compiled list. 



t2^. vernonioB Thos.: 8th Rep. State Ent. 111. (1880), p. 97; San- 

 born, Kans. Univ. Sci. Bull., Vol. Ill, No. 1 (1904), p. 57, 2 figs. First 

 reported by Thomas. 



*A. vihurnicola Gill.: Ent. News, Vol. XX (1909), p. 280, 1 pi. 

 Common on snowball {Viburnum opulus) in the vicinity of Chicago. 



^Cerosipha ruhifolii Thos.: Sanborn, Kans. Univ. Sci. Bull., Vol. 

 Ill (1904), p. 44, figs. I place this species in Del Guercio's genus 

 Cerosipha on the authority of Mr. H. F. Wilson. I have not seen 

 the description of this genus, which Mr. Wilson has kindly informed 

 me is in "Nuove Relazioni R. Stazione di Entomologia Agraria di 

 Firenze, 1900, p. 116." This species is very common in Ilhnois, 

 curling and injuring the foliage of the cultivated and wild blackberry. 



'Exceptions: — one individual had segment VI filament 0.024 mm. shorter than 

 III, and another had Vl filament and III of equal length. 

 sCarbondale, 111., and Fort Dodge, la., are the type localities. 



