SUBFAMILY APHINAE 143 
Male. Alate. Body length 1; antenna 1.10. 
Collections. On plum (Prunus domestica and sp.) as winter host, tightly 
curling leaves; on the following summer hosts: On leaves and stems of Achillea 
millefolium, celery (Apium graveolens), Ambrosia artemisiaefolia, Aster sp., 
Capsella bursa-pastoris, Chrysanthemum, Cineraria sp., thistle (Cirsium sp.), 
Dahlia sp., Erigeron canadensis, Eupatorium sp., Lappula sp., apple (Malus sp.), 
Malva rotundifolia, Mertensia sp., Onosmodium occidentale, Senecio sp., 
Tanacetum vulgare, clover (Trifolium hybridum, pratense and repens), Urtica 
sp., and Vinca sp. Colorado: Fort Collins, Pingree Park, La Porte, Boulder, 
Palisade and Grand Valley. Utah: Salt Lake City, Providence, Hyde Park, 
Newcastle and Logan. Idaho: Berger, Buhl, Castleford, Hollister and Twin 
Falls. Fundatrices on plum April 15 to May 10; apterous summer viviparae on 
plum April 21 to June 21, on summer hosts May 16 to Dec. 3; alate vivipara 
May 11 to June 12 and Aug. 15 to Oct. 27 on plum and May 20 to Dec. 25 on 
summer hosts; sexuales Oct. 16 to Nov. 3 on plum; very common and injurious 
at times to plums and clover in Idaho as reported by Smith (op. cit.) and in 
western Colorado. 
Stem 2S EN ok Pd LL Co. 2S Dorsal Ha 
OS SEERA wee = pte. : 
Mother’ 17 08.09 .10 mle 3» surface 039" Ta — Cornicle (Alate 
A OG ea Er aa A Sa nao io 3a en ee R - |_) apt. 
iv; Gee Tis) (08-1D 08 (16-24) Sere To-.11) viv) 
Reet At gee | 
Spring ron C 
' IS o 0 00090950 OOF OS : auda 
ny C 3 (30 -.90)6en.2.0-30 ) (7-.22MSen.Fi2yl.12-16)(09312)  C27-.35) ig Bee 
Hind tibia = ee 
ys S2s0 COU% T G°CTGO_o' v aa 2 +7 S 
68 age ea ae : tN 
CG (Alate) Co J 2n00G§ 2 Alata=A)pt 
Hd.Ti, f _Alafe Viv 090060000 
30 
Fig. 157. Aphis helichrysi 
This species is considered by Theobald (1927:403) to be the A. padi of 
Linnaeus. Since opinions of Hille Ris Lambers (1933:31) and Rogerson 
(1947:157) differ from that of Theobald as to the identity of A. padi it seems 
better to retain Kaltenbach’s name. 
Aphis heraclella Davis 
The Wild Parsnip Aphid 
Aphis heraclei Cowen (in Gillette and Baker), 1895:120 (preoccupied). 
Aphis heraclella Davis, 1919:228 (n.n. for heraclei Cowen); Gillette and Palmer, 
1932b:405. 
Apterous Summer Vivipara: Deep green, mottled with yellowish green; distal half of 
antenna, cauda and anal plate dusky; cornicle, tarsi and tips of tibiae black. Body length 
1.50-1.70; hind tibia .75-.90; hind tarsal II .14; antenna .95-1.33, III .27-.50, IV .13-.27, V 
-16--.22, VI .10-.14-+-.22-.31; cornicle .21-.40; cauda .10 on median line, .17 on side; rostral 
IV+V moderately slender, .12 long, attaining between 2d and 3d coxae. Cauda elongate, 
nearly parallel-sided, with tendency to constriction near base, bearing 3-4 pairs of lateral hairs 
and a single preapical one. 
Alate Vivipara. Alatoid Nymph. Brownish yellow marked with green dorsolateral spots 
on abdominal I to IV and solid band on V; tesselated with white. Adult. Head and thorax 
black; abdomen deep green mottled with yellowish green, marked with dusky on lateral areas 
and dorsal dashes on abdominal VI, VII and VIII; antenna, cornicle, cauda and anal plate 
dusky; legs mostly pale. Body length 1.40-1.90; hind tibia .90-1; hind tarsal II .14; antenna 
1.30-1.36, III .31-.49, IV .19-.30, V .17-.26, VI .10-.13-++.25-.35, secondary sensoria tuberculate, 
scattered in two irregular rows over entire III, 15-28 in number; cornicle .16-.31; cauda .09 
on median line, .15 on side. Hairs pointed, sparse; .02-.03 long on III and vertex; on hind 
tibia .025 (diameter of tibia .03). Lateral tubercles small. 
