96 Ajinals Entomological Society of America [Vol. II, 



turn, (scutal lobes), scutellum and postscutellum by some aphid- 

 ologists, and I accordingly use the same terms, although I do not 

 know their homologies. I avoid the long term viviparous female 

 giving preference to its simple equivalent, vivipara (pl.-se), 

 which, being a classical word of the feminine gender, means liter- 

 ally the viviparous female. Since all viviparous plant lice are 

 necessarily females, I can see no ambiguity in the use of this word. 



Winged vivipara. Head dusky green; antennae dusky with pale 

 articulations, sparsely hairy, joint III, usual number of sensoria 

 9 or 10, sometimes 11-13 (Figs. 10, 15, 18) ; eyes dark red; beak extend- 

 ing beyond transverse sternal suture, but not reaching middle coxae. 

 Pronotum dusk 3" green ; lateral tubercles present, not prominent, longer 

 than broad. Mcsothorax greenish yellow; prescutum, scutal lobes 

 and postscutellum blackish, scutellum (in formalin) brownish with 

 black anterior and posterior margins; mesosternal plates brown, meta- 

 sternal region dusky; 1st and 2nd discoidal veins of the forewing more 

 or less distinctly joined to radius, never completely atrophied at base 

 (Fig. 6). Base of femora brownish yellow, elsewhere dusky; tibiae 

 brownish yellow with dusky apex, tarsi dusky to black. Abdomen 

 green, varying to yellowish green. Dorsum with irregular, variable, 

 dusky maculations, most commonly resembling Fig. 5. The four 

 large lateral spots in front of the cornicles distinct, dusky to blackish. 

 The seven small, lateral, obtuse tubercles distinct but not conspicuous, 

 mostly broader than long (Fig. 5). Cornicles dusky, swollen at and 

 beyond the middle, a little shorter than hind tarsus, surface smooth, 

 never imbricated (Figs. 8, 12) ; cauda uniformly pale yellowish from 

 base to apex, the luargins black anterior to the distinct median constric- 

 tion, posterior to which are 3 pairs of long curved setae; anal plate beset 

 with several similar setae, 6-8 along posterior margin. 



Measurements. (Antennae measured from base of III to apex of 

 filament). Length of body, head to base of tail, 1.49 mm. (1.39- 

 1.70); greatest width of abdomen, .662 (.61-.696). Antennae, .97- 

 1.00; III, .335; IV, .155; V, 155; VI (scape) .107, filament, .25. Fore- 

 wing, 2.0-2.26. Cornicles, 0.12; cauda, 0.155. 



Pupa. Color similar to the winged vivipara, with indistinct or no 

 maculations except irregular deeper green marks on mesothorax; 

 wing-pads dusky. 



Wingless vivipara. Head dusky yellow with two median dusky 

 spots close together. Antennae I-II concolorous, elsewhere light 

 brownish, the distal joints becoming dusky; without sensoria except 

 the usual one at apex of V and the group at the apex of the scape of VI. 

 Eyes reddish black or black. Beak extending to or a little beyond 

 mesocoxae. Thorax yellowish green varying to green ; a dusky dorso- 

 lateral impressed spot on each segment, the one on the mesothorax 

 longitudinal linear, often broken into a row of small spots; thorax 

 otherwise without maculations. Distinct prothoracic lateral tubercle, 

 longer than broad. Legs yellowish-brown except the dusky apex of 

 tibiae and the tarsi. Abdomen concolorous with thorax, without macu- 



