212 APHIDS OF THE ROCKY MOUNTAIN REGION 
10. Cauda bearing 4 pairs of hairs; sensoria 2 on III of aptera; media of fore 
wingswith?2d ‘branch normal (p. 213) seece secre tere ance eee ee bossekiae 
Cauda bearing fewer than 4 pairs of hairs; sensoria absent on III of aptera; 
media of foreswing with 2d (branchtshor te csccc-cc-coscceccce-csste-- secs er ereale sacte teeoe eter ee 11 
126 Unguis'135-2) times base of ¢V Ea(pys 27) eer cce eee se ace maidis 
sia ob nguis Jonger than twicesbase: Of  ViLe.cseqcncceccceccs Soe: tune noaee set oat eee setec te sees spares eee ae 12 
12. Unguis?3-4i times) base of) Vili (psc 22.2) sores aera eee eee ee sceirpifolii 
Unguis. 4-5\timeés base’ Of VU 22222... recs ceqscennss- cotaccesancconcet pen giet Avene: vennapans cee ecene ce soe ese ee 14 
-. .Unguis.5-6 times base!of ViTo22cscc 5c ecn hc ectcce vents seseetcsecseosceaversenantseact ieee tecseesete see eae 13 
13. Length of hairs on III in aptera not exceeding diameter of III; 
body reddish brown; body length’ 2 or more: (pe 214) secs co occeeececeseseecces oes cress sueeeee eee enigmae 
Length of hairs on III in aptera exceeding diameter of III; body green with 
red areas about cornicle bases; body length smaller than 2 (p. 223).......--........-20000 splendens 
Same as above except body brown or grayish green and without 
TEC COLOTAtION: Cpa 224) ccs ccec ces se ete soak se cna ees Sa oe Sune coon eestege eer eeneeeee eee aE as cee nee subterraneum 
14. Fore wing with media always twice-forked (p. 215).........--.------ecsccecceecccenecerenersneceeneneececenes fitchli 
Fore wing with media twice-forked or frequently once-forked (p. 219)....-........-..:--ccccseeeee= padi 
Rhopalosiphum berberidis (Kaltenbach) 
The Barberry Aphid 
Aphis berberidis Kaltenbach, 1943:95. 
Rhopalosiphum berberidis Gillette and Palmer, 1932b:480. 
Overwintering Vivipara. Apterous. Green, splotched with red especially laterally and 
posteriorly; antenna, cornicle, cauda and legs pale. Body length 2.10; antenna .84; hind tibia 
.70. 
Apterous Summer Vivipara. Yellow tinged with greenish especially on dorsolateral 
areas; antenna, cornicle, cauda and legs pale with tarsi and tips of tibiae dusky. Body length 
1.50-1.70; hind tibia .55-.82; hind tarsal II .12; antenna .75-1. Hairs slightly capitate to blunt; 
rostrum obtuse, attaining or slightly surpassing 2d coxa. Dorsal body surface rugose. 
Roxas 
Apt.V 0m fae 1 ee 40-50 
Alate Viv..36 
Ti. 6.30 
of 
A\c = eae = a > 2124 
) 
Sen.6-9 
Viv 
CREEP OS AOE ES Alaze 
9.2.00, 0° G00 2 $0 0°00? 0% 0 05 00 OG Nv 
Hd.Tie 8 °o; oo ° 22000 0209.5 2 0p 00. 098 
So 88 309,0.090° 0° 6 2 00° £00050 air Vert. 
= 
éi = 
Fig. 248. Rhopalosiphum berberidis 
Alate Vivipara. Head and thoracic lobes yellowish brown; pronotum and abdomen yel- 
low, the latter with dorsolateral row of green spots; cauda yellow; antenna slightly dusky; 
legs yellowish with tarsi black and tips of tibiae brown to black; cornicle pale yellow with tip 
dusky. Body length 1.7-1.9; hind tibia .82; hind tarsal II .12; antenna 1.25-1.50, rostrum 
attaining between Ist and 2d coxae. Hairs pointed; .01 on hind tibia. Cornicle smooth, club- 
shaped, .04 wide at base .09 in distal half, constricted at tip, with flange. Cauda long, tapering 
with 3 pairs of lateral hairs. 
Ovipara. Apterous. Pale to deep salmon with a pair of dorsolateral rows of greenish to 
rusty brown blotches extending from pronotum and united into a solid patch on abdominal 
V or VI, VII and VIII, also a lateral row on each side of abdomen anterior to cornicle; 
antenna, lst and 2d tibiae and cornicle pale yellow with black tip; hind tibia dusky through- 
out; cauda pale yellowish. Body length 1.50-i.80; antenna .95. Hind tibia distinctly swollen 
and thickly covered with small convex sensoria. 
Male. Alate. Head and thorax dusky brown with pair of oblique green dashes on prono- 
tum; abdomen pale yellow with 6 greenish to dusky spots or bands; antenna dusky brown; 
cornicle pale yellowish to brownish. Body length 1.40; hind tibia .80; antenna 1.45; segments 
and sensoria as in alate vivipara; cornicle .30, 
Collections. On leaves or bark of twigs of Berberis vulgaris. Colorado: Fort 
Collins and Greeley. Fundatrices and hibernating apterous viviparae March 25 
to April 8, apterous summer viviparae April 27 to Nov. 14, alate viviparae ee 
19 to Dec. 2, sexuales Oct. 2 to Nov. 29; common. 
