16 BULLETIN" 276/ U. S. DEPAETMENT OF AGEICULTTJEE. 
Adult wingless viviparous female. — (Described from four specimens 
reared on red clover, Aug. 18-22, 1912.) (Fig. 4.) Entire body pale 
gradually blackening toward tip; YI dark brown to black; segment 
green, the anterior part, including head and usually the first and sec- 
ond thoracic segments, as a rule 
paler. The red eyes of the 
embryos within the body are 
almost always visible through 
the dorsal body wall. As seen 
through the binocular the liv- 
mg individual appears slightly 
roughened and reticulated. 
Eyes dark reddish brown. 
Antennae (fig. 4, a) on prom- 
inent tubercles; reaching be- 
yond tip of Cauda; filament of 
segment YI the longest, it bemg 
noticeably longer than III; 
segments I and II concolorous 
with head; III and lY dusky 
Fig. 4. — Macrosiphum pisi: Adult wingless female of 
viviparous generation, much enlarged; c, anteima, and 
b, cornicle, of same, more enlarged. (Original.) 
greenish to pale brownish, with the 
tips blackish; Y darker, gradually 
blackening toward tip ; YI dark brown 
to black; segment III with one or 
two, and sometimes three, circular 
sensoria near the base; segments Y 
and base of YI with the usual distal 
sensoria; hairs short and sparse. 
Beak reaching to coxae of second pair 
of legs. Legs long and slender, mod- 
erately hairy ; femur pale green with a 
slight brownish tint toward apex, 
joint of femur and tibia dusky; tibia 
pale green, with a slight brownish 
tint, and the tip blackish; tarsus 
black. Cornicles long and slender, broadest at base, tip imbricated 
and no sign of reticulation, just reaching to tip of cauda, pale green 
at base, paler or with a faint bromiish tint toward apex, the 
extreme tip black. Cauda concolorous with body, ensiform, and 
Fig. 5.— Macrosiphum pis'r Tupaof viviparous 
generation. Much enlarged. (Origmal.) 
