SUBFAMILY APHINAE de} 
Aphis abbreviata (Patch) 
The Buckthorn Aphid 
Aphis abbreviata Patch, 1912a:170; Gillette and Palmer, 1932b:379. 
Aphis rhamni Boyer de Fonscolombe (misidentification ?), Theobald, 1927:199 and 404. 
Fundatrix. Body length 1.5; antenna .75, III and IV coalesced; hind tibia .63; otherwise 
as in summer vivipara except as figured. 
Apterous Summer Vivipara. Pale green to yellowish; darker green on median line and 
lateral and posterior portions of abdomen; cauda and cornicle dusky; appendages pale or but 
slightly dusky; tarsi and tips of tibiae blackish. Same measurements as alate vivipara except 
body 1.50-1.80; and as figured. 
Alate Vivipara. Color same as in apterous vivipara except dusky on lateral abdominal 
areas and appendages. Body length 1.30-1.50; hind tibia .75-.90; hind tarsal II .10; antenna 
1.15-1.20. Rostrum obtuse, attaining between 2d and 3d coxae. Hairs short .01-.02 long, droop- 
ing and sparse on hind tibia and antenna, Cauda cylindrical, blunt, with slight neck and 
broader base, bearing 3-4 hairs on each side. 
Ovipara. Apterous. Body length 1.10; antenna .75, III and IV coalesced; cornicle .10; 
rostral IV+ V .08-.09. Otherwise as in apterous vivipara. 
/ Apt.Vi ae 
aS SE oe . 19 G10 
Fig. 127. Aphis Mi orotate 
Collections. On leaves and stems of Rhamnus cathartica, curling leaves. 
Colorado: Fort Collins. Fundatrices April 16, apterous summer viviparae April 
30 to July 31, alate viviparae April 28 to Nov. 4, oviparae Nov. 2 to 4; rather 
common. 
Cotypes. Me. Agr. Exp. Sta. Collection, No. 123-10. 
Chief Distinguishing Characters. Pale yellowish green color, uniform in 
whole colony (not varying from very pale yellow to very dark green in- 
dividuals as in. A. gossypii), presence of secondary sensoria on IV (3-6) of 
alata, long cauda (.10-.14 on median line), long cornicle (about same as IV in 
alata and exceeding IV in aptera) and color of the cornicle (pale to dusky, not 
black). 
This species differs from A. rhamni Boyer de Fonscolombe in the following 
characters as given in the original description of the latter, namely: A dark 
dorsal patch in alate vivipara and dorsal bands in apterous vivipara and cauda 
absent or appearing as a mere nipple. 
Patch (1924:43) considers it to be the same as Theobald’s A. solanina 
Passerini. Theobald (1922:10 and 1927:199) considers it the same as what he 
describes as A. rhamni. Hille Ris Lambers (1934:28) considers both of these 
A. symphyti Schrank. Schrank, however, in the original description says 
“cornicle very short.” This very poorly fits our form. It seems best to use 
abbreviata at present though it may later be proven to be a synonym. 
Aphis agathona Hottes 
Aphis agathona Hottes, 1950:21. 
Apterous Summer Vivipara. Brown with coxae, trochanters, femora, cornicle, cauda, anal 
plate, genital plate, tips of tibiae, antennal I, II, tips of IV, V and VI and of rostrum black. 
Body length 1.40-1.85; across eyes .34-.38; hind tibiae .60-.80; antenna 1-1.2; rostrum attain- 
ing about to 3d coxa. Cauda shorter than broad, tapering, bearing 2-3 pairs of lateral hairs 
and 1-2 dorsal preapical ones. Cornicle cylindrical to tapering, with flange. Hairs incon- 
