PROCEEDINGS. ISIS. 85 



most complete paper on this species, written liv Professor F. \'. 'I'lieo- 

 Ijald, of Wye, Kent, England, will be found in "The .\nnals of Applied 

 l!iolin;y," \'ol. I., .\o. 1, Alay 1914. My determination of the species is 

 based ii|)on specimens sent to me by Professor Theobald. The known 

 Staines are described as follows: 



Apterous viviparous female: (lOneral color, yellowish green to 

 green, with a dark line on each side of the abdomen. Antennae pale 

 yellowish green at the l)ase and throughout segments three and four. 

 The remaining parts dusky to black. Legs green, except tips of femora 

 and tibiae, and tarsi. Nectaries pale green, tips dusky. Cauda, green. 

 Mead with a large broad frontal tubercle and with distinct antennal 

 tubercles. Alxlonien almost round, antennae about half as long as the 

 1)1 idy. .Xectaries long and slender, and quite characteristic of the Genus 

 Alvzus. Cauda long, sharply tapering and constricted toward the base. 



Measurements: I^ength of body. 1.55 nun.; width, 1 mm.: lengtli 

 of antennal segments. III, 0.44 mm.: 1\', 0.17() mm.: \'. 0.17() mm.; \"1. 

 0.09; spur, 0.135 nun.; length of nectaries, (1.44 nun.; length nt ciud.-i. 

 0.22 mm. 



Alate viviparous female: General color of head and thorax light 

 brown, abdomen bright green with four rows of dark green spots; one 

 row extends in a slow curve on each side of the median line, and the 

 others extend along the sides of the abdomen. The two dorsal rows 

 appear to be connected by faint dark green lines. Antennae yellowish 

 green at the base and dusky green at the tip. Legs pale .green, tips of 

 tibiae and tarsi dusky. Nectaries pale green to dusky, cauda pale green. 

 Antennae reaching to about the base of the nectaries. First antennal 

 segment strongly gibbous, third roughened and with 9 to 12 or more 

 sensoria, some of which are as wide as the segment itself, fourth segment 

 with about four, fifth with one, and sixth with usual sensoria at base of 

 spur. Wings with very variable venation, median vein sometimes once 

 forked in front vein and occasionally wanting in hind wing. Opposite 

 wings of same individuals may have widest possible variation. Nectaries 

 cylindrical, sometimes with a very slight double curve, and reaching to 

 tip of Cauda. Cauda long and sharply tapering. 



Measurements: Length of body, 1.6 to 1.8 nun.; width, 0.7 mm.; 

 length of antennal segments, IH, 0.42 mm. ; I\', 0.242 mm. ; \', 0.22 nmi. ; 

 \ I, 0.12 mm.; spur, 0.198 mm.; length of nectaries, 0.43 nun.; length of 

 caiula, 0.25 mm.; length of wing, 2.8 nun.: width, 1 mm. 



References. 



1. Ann. Mag. Nat. Hist., IIL Ser. 2, pp. 301-302—1848. 



2. P. \'on der Goot, Zur systematik der aphiden, Tijdscrift voor 



Entomologie, Dec. L\'L 1913. 



