PAPERS ON APHIDID^. 



on Y, and the usual ones at the distal end of base of VI; subequal in 

 length to that of the body; III the longest, it being nearly twice as 

 long as IV and four times base of YI; lY and Y subequal, and base of 

 YI slightly less than one-third of filament of YI. (See iig. 3, h.) 

 Beak reaching just beyond the coxa? of the second pair of legs. Legs 

 l)ale, excepting the tai-si and distal ends of the tibia^, which are black- 

 ish (in some specimens the basal ends of the femora are pale and the 



reniainder gradually be- 

 I \ I coming dusky toward 



the apices, tibiae dusky 

 excepting the blackish 

 tips, and the tarsi black). 

 Cornicles and style whit- 

 ish green. 



Measurements (from 

 specimens recently 

 mounted in balsam) : 

 Length of body, average, 

 1.127 mm.; width, 0.4143 

 mm.; antenna, I, 0.057 

 mm.; II, 0.0489 mm.; 

 Ill, 0.2934-0.3504 mm., 

 average, 0.3209 mm. ; IV, 

 0.1467-0.22 mm., aver- 

 age, 0.1793 mm.; V, 

 0.1548-0.1874 mm., av- 

 erage, 0.1712 mm.; VI, 

 base, 0.0733-0.0896 mm., 

 average, 0.0815 mm. ; YI, 

 filament, 0.2445-0.3097 

 mm., average, 0.269 

 mm.; average total, 

 1.1278 mm.; cornicles, average, 0.1074 mm.; style, average, 0.1026 

 mm.; hind tai-sus, 0.1074 mm. 



Described from seven living specimens. Types mounted in balsam 

 on five slides, October 13, 16, and 18, 1909. In the collection of the 

 Bureau of Entomology, L^. S. Department of Agriculture. 





Fig. 3. — Toxoptcra muhlenbergix: a, Wingless male, greatly eii' 

 larged; ft, antenna of same, more enlarged. (Original.) 



WINGLESS OVIPAROUS FEMALE. 



(Fig. 4.) 



Head pale yellowish and the thorax yellowish green. Abdomen 

 pale greenish, the sides being decidedly pale green and the median 

 dorsum more of a yellowish, this latter being due to the yellow eggs 

 within. Eyes black. Antenna with segments I and II concolorous 



