138 APHIDS OF THE ROCKY MOUNTAIN REGION 
Apterous Summer Vivipara. Same in color and measurements as alate vivipara except 
the following: Antenna yellowish to middle of V and hind tibia .58-.63. Hairs pointed, 
rather sparse; on vertex and antenna .01-.02 long; on hind tibia drooping .02-.03 long. Cauda 
nearly parallel-sided, with slight neck, bearing 3-4 pairs of lateral hairs. 
Collections. On Nepeta cataria. Colorado: Fort Collins. Utah. Numerous 
localities throughout the state. Idaho: Twin Falls. Apterous viviparae July 10 
and with alate avi perae Sept. 4 and 5; abundant at times. 
be 
feo 8 
43) Hi 
Fig. 152. Aphis frangulae 
Chief Distinguishing Characters. The number of sensoria on III (8-14) 
and IV (2-4) in alata and the occasional presence of sensoria on these antennal 
segments in aptera and length of rostral IV+V (.10-.11) and attaining beyond 
3d coxa. 
Acknowledgments are due to Hille Ris Lambers for aid in determination 
of this form by comparison of our specimens with European material and con- 
tribution of determined specimens. 
Aphis fraserae Gillette and Palmer 
Aphis fraserae Gillette and Palmer, 1929a:16 and 1932b:399. 
Apterous Summer Vivipara. Yellowish green, mottled with dark green, often blackish; 
appendages pale brownish, shading to dusky distally; cornicle and cauda and anal and genital 
plates dusky to black. Body length 2; hind tibia .83; antenna 1.16; rostrum attaining 3d coxa 
or abdominal I. 
Alate Vivipara. Head and thorax black and lateral areas on abdomen blackish; other- 
wise same as aptera in color and measurements except body 1.66 and as figured. Cauda blunt, 
almost parallel-sided with 5-6 hairs on each side. Hairs pointed; on body .04 long, rather 
sparse; on hind tibia, rather numerous and nearly erect. Lateral tubercles evident on pro- 
thorax and well developed on abdominal I and VII. 
oe can 
ae ree 
(rear 
Fig. 153. Aphis fraserae 
Collections. On flower pedicels of Frasera speciosa. Colorado: Bellvue, 
Boulder, Ward and Pingree Park. Idaho: Burley. Wyoming: Tie Siding. Ap- 
terous summer viviparae May 28 to Sept. 2, alate viviparae June 9 to Aug. 12; 
rather common. 
Type. U.S.N.M., No. 41460. Paratypes, Colo. Agr. Exp. Sta. Collections. 
Chief Distinguishing Characters. Yellowish green mottling in body color, 
short unguis (not longer than .27 and shorter than III), numerous sensoria on 
III of alate vivipara and occasional presence of sensoria on III of apterous 
vivipara. 
