146 ENTOMOLOGICAL NEWS. [April, '08 



Measurements. Length of body, 1.5273-2.1816 mm.; width, 1.0908- 

 1.2816 mm.; antenna, I, 0.0801; II, 0.0611; III, 0.2635; IV, 0.2159; V, 

 0.1969; VI, basal, 0.0896; filament, 0.3273; total 1.2444 mm.; cornicles, 

 0.1738 mm.; hind tarsus, 0.1344 mm.; style, 0.1141 mm. (The above 

 measurements are averages from specimens mounted in balsam.) 



Egg. The black shining egg is elliptical and measures 0.7009 by 

 0.3260 mm. 



Winged male. Head and thorax black, abdomen dark reddish brown. 

 Antenna? black, imbricated, with numerous circular sensoria irregularly 

 placed on segments III, IV, and V. There are usually twenty or thirty 

 sensoria on III and IV, and half that number on V, but these num- 

 bers sometimes vary although the proportions are generally the same. 

 Eyes black. Wings hyaline, with black veins, the first and second dis- 

 coidals branching at a point about two-thirds the distance from where 

 they leave the third discoidal to the margin. Legs dark to black, 

 excepting the middle portions of the tibiae and femora. Cornicles very 

 dark, almost black, cylindrical, imbricated, slightly less than the hind 

 tarsi in length. Style dark but not black, conical, and longer than the 

 tarsus. 



Measurements. Length of body, 1.1999 mm.; width, 0.5636 mm.; 

 length of wing, 1.7452 mm.; antenna, I, 0.0591; II, 0.0529; III, 0.2180; 

 IV, 0.1895; V, 0.1650; VI, basal, 0.0825; filament, 0.2872; total, 1.0542 

 mm.; cornicles, 0.0978 mm.; hind tarsus, 0.1141 mm. (Measurements 

 from specimens in alcohol and in balsam.) 



Mr. T. A. Williams, in a bulletin of the Department of 

 Entomology, University of Nebraska, listed a new species, 

 Aphis parthenocissi on Parthenocissa quinquefolia, but did not 

 describe the same. 



This species is closely allied to Aphis ilicis Kalt. (A. hcd- 

 crae Kalt.) of Europe, but compared with the European de- 

 scriptions is quite distinct. 



I respectfully dedicate this species to Doctor Justus W. 

 Folsom, who by the publication of "Entomology with refer- 

 ence to its Biological and Economic Aspects" has done so 

 much for the advancement of entomology, and to whom the 

 writer is indebted for many helpful suggestions. 



EXPLANATION OF PLATE VII. 



Aphis folsomii. i, wing of viviparous female; 2, style of winged 

 viviparous female; 3, cornicle of winged viviparous female; 4, hind 

 tibia of oviparous female, showing sensoria; 5, antenna, of wingless 

 viviparous female ; 6, of winged viviparous female ; 7, of wingless ovi- 

 parous female ; 8, of winged male. 



