Williams' "The Aphididae of Nebraska" 21 



base, 0.078-0.087 ; \' I, filament, 0.20-0.226 mm ; length of body, 

 1.88 mm; of cornicles, 0.12 mm. 



No winged specimens of Aphis solid aginifoUae were found in 

 the University of Nebraska collection but a cotype from the collec- 

 tion of Mr. J. T. Alonell has recently been loaned to me by Mr. 

 ]\Ionell. The slide is labeled " Aphis solidaginis n. sp. On Solid- 

 ago. Brookings, S. Dak. 7- 14- 1 891." and bears three winged 

 and three adult wingless viviparous females, as well as a number 

 of immature individuals. Notes made from specimens on this 

 slide follow, — 



Winged viviparous female: Antennae extending almost to the base of 

 cornicles; segment III bearing 27-34 irregularly placed, circular, tubercu- 

 late sensoria, segment IV with 12-ig, and segment V with 5-6 similar sen- 

 soria; the usual cluster of smaller sensoria at tip of the basal portion of 

 VI. Wing veins blackish; Mi (= first branch of the third discoidal) 

 branching at half or slightly less than half the distance from the tip of 

 the wing to where M3+4 branches. Cornicles apparently black from 

 examination of these balsam mounts, and rather short, they being about 

 two fifths the length of antennal segment III. Style broadly conical, 

 short, and apparently black. Measurements as follows : length of body 

 1.5 mm; width, 0.66 mm; cornicle, 0.156 mm; style, 0.087 mm; length of 

 wing, 2.3 mm ; width, 0.82 mm. Antennal measurements : 



1 II III IV V VI base VI filament 



.05 .055 .41 .18 .13 .095 .22, mm 



— .38 .18 .14 .087 .22 mm 



— .39 .19 .13 .095 -30 mm 



•05 .055 -Z? -18 .15 .095 .36 mm 



.05 .06 .365 .17 .15 .10 .345 mm 



Wingless viviparous female: Antennae reaching a little beyond middle 

 of body; segment III bearing 19-27 irregularly placed, circular, moderately 

 tuberculate sensoria, segment IV with 11-15, segment V with 2-4, not 

 counting the usual distal one, and VI base, with the usual cluster at the 

 tip. Beak reaching to coxae of second pair of legs. Cornicles and 

 style as in winged. Measurements as follows: length of body 1.6 mm; 

 width, 0.9 mm; cornicle, 0.156 mm; style, 0.87 mm. Antennal measure- 

 ments : 



