400 APHIDS OF THE ROCKY MOUNTAIN REGION 
CC.—Body 2 to 3; hind tibia 1.1 to 1.3; rostral IV .14; hairs on hind tibia 3 
times as long as diameter of tibia; body yellow-olive-green to green-brown; 
flocculent; legs pale. (p. 36).......... The Flocculent Fir Aphid (Cinara occidentalis) 
Fir, Douglas (Pseudotsuga taxifolia). On twigs. 
A.—Cornicle mammiform, hairy; body longer than 3; rostral IV .20. (p. 38)................ 
dkandingkassaceunege ney ang ccinan de Se Doren pee Ss beg ak a nc NM cee aS ea Cinara osborni 
AA.—Cornicle hardly more than raised rim; body not longer than 3; rostral IV not 
longer than .16. 
B.—Hairs on hind tibia fine, numerous, very drooping; rostral IV .16; body dark 
brown with powdery patches. (p. 42).-.-.....-..--::ceccceeeeeeeeeceeeeeeeeeeeeeeees Cinara pseudotaxifoliae 
BB.—Hairs on hind tibia rather spinelike, semi-erect, hardly numerous; rostral 
IV not longer than .12. 
C.—Distal half of hind tibia blackish; III at least 3 times as long as rostral 
IV; body pale brownish, white medially. (p. 43)............---..-.----- Cinara pseudotsugae 
CC.—Distal tip only of hind tibia blackish; III 2 to 3 times as long as rostral 
IV; body pale brownish or greenish to whitish. (p. 48)............-.-- Cinara splendens 
Geranium, Tame (Pelargonium sp.) 
Body grape-green; antenna longer than body; cornicle not swollen, not longer 
than III, not reticulated; rostral IV-+V .15 long same as hind tarsal II; cauda shorter 
than twice hind tarsal II. (p. 319)....The Tame Geranium Aphid (Macrosiphum pelargoni1) 
Geranium, Wild (Geranium sp.) 
A.—Cornicle not longer than III, slightly swollen, not reticulated; rostral IV-+V .25 
long, twice as long as hind tarsal II; cauda 2 to 3 times as long as hind tarsi. Dull 
yellow-green with sooty to grass-green mottling. (p. 235) ...............-::scccccccsseeeecceecensneenceseeene 
Aaa fel NY, NSPS eo ag athe pte The Wild Geranium Aphid (Amphorophora geranii) 
AA.—Cornicle equal to or longer than III, reticulated next to tip, not swollen; rostral 
IV+-V shorter than twice hind tarsal II. 
B.—Body greenish; cornicle bearing hairs. (p. 289)............ Macrosiphum aetheocornum 
BB.—Body pale yellowish green to pinkish; cornicle not bearing hairs. (p. 324) 
A RESO A eee Sb lemer aS Aree: BEC SMS A The Potato Aphid (Macrosiphum solanifol1i) 
Gladiolus (Gladiolus sp.) 
A.—Antenna longer than body; frontal tubercles exceeding vertex. 
B.—Dorsum of abdomen immaculate in both alata and aptera; cornicle not shorter 
than III, reticulated before tip; cauda .40 to .50 long. (p. 324) -........2....-:ccceeeceeeeeeeeeeee 
Be arith el ne Ames HI ROR le 9 cy The Potato Aphid (Macrosiphum solanifolii) 
BB.—Dorsum of alata not immaculate; cornicle not longer than III, not reticu- 
lated; cauda shorter than .40. 
C.—Dark dorsal patch or bands on abdomen of alata; cornicle without cross- 
striae at tip. 
D.—Horseshoe-shaped dark patch on dorsum of aptera; cornicle never 
swollen, shorterthan’ IV... (pp. 336) <cc.-10cc2sccccccccs-cccacsecsnees=ecseseeeseeseeee tee 
aenat sea soet oat rate omens ee The Crescent-marked Lily Aphid (Myzus circumflexus) 
DD.—Dorsum immaculate in aptera; cornicle usually slightly swollen, 
longer than IV. (p. 340).................... The Green Peach Aphid (Myzus persicae) 
CC.—Broken intersegmental dashes and lateral areas on abdomen of alate 
vivipara, apterous vivipara immaculate; cornicle with 2 or 3 cross-striae at 
tIps- (Pe. S42)) Aesce ese eee ce ae eee ee The Foxglove Aphid (Myzus solani) 
AA.—Antenna shorter than body; frontal tubercles not exceeding vertex. 
B.—Numerous tuberculate sensoria on III of alata; cauda not longer than wide 
at base, bearing”only’2 hairs” onval Sides (ps US 1 iter rte ces cre eee 
Sea pei NeW I Per ts cota cea a oy eae The Tulip Bulb Aphid (Aphis tulipae) 
BB.—Sensoria not more than 18 on III of alata, not tuberculate; cauda longer 
than wide at base. 
C.—Sensoria 12 to 18 on III of alata; body black; cauda bushy; rostral 
IV+-V.13 to :U5clong:*(p; 135). nite eeaeee The Bean Aphid (Aphis fabae) 
CC.—Sensoria 7 to 10 on III of alata; body yellow, medium green or dark 
green; cauda not bushy; rostral IV-+V .10 to .11 long. (p. 139).........000..0....-- 
ec Os ee Ce ere The Cotton or Melon Aphid (Aphis gossypii) 
Goldenglow (Rudbeckia sp.). On leaves and stems. 
A.—Body brick-red; sensoria 34 to 44 on III of alata, 19 to 26 in aptera. (p. 322)........ 
SR at ERE IRN EN CE Re RS on or Re The Goldenglow Aphid (Macrosiphum rudbeckiae) 
