404 APHIDS OF THE ROCKY MOUNTAIN REGION 
Millet—see Grain Crops 
Mountainash—see Apple 
Muskmelon—see Cucumber 
Nasturtium (Tropaeolum majus). On leaves. 
A.—Body black; antenna shorter than body; cornicle cylindrical, 1 to 1.5 times as 
long as hind tarsal II; sensoria 12 to 18 on III, several usually present on IV in 
ala tase (pst LS 5.) Beer eee AM ASO rane ae ec eer ee ee The Bean Aphid (Aphis tabae) 
AA.—Body pale green, alata with dark dorsal patch or bands on dorsum of abdomen; 
antenna at least as long as body; cornicle swollen, 2 to 4 times as long as hind tarsal 
II; sensoria 10 to 15\on III; absent on IV in alata. (p. 340) 22.2 cece eee 
SR i ak Ty Pear iat BS ee oa BA erty OS NS The Green Peach Aphid (Myzus persicae) 
Norway Spruce—see Spruce 
Oats—see Grain Crops 
Parsnip—see Celery 
Peach (Prunus persica) 
A.—On bark and roots. Frontal tubercles not extending beyond vertex; cauda shorter 
than hind tarsal II; body shining black to brownish; cornicle twice as long as hind 
tarsal’ LT Spiel 62) sesee sree eee eee The Black Peach Aphid (Aphis persicae-niger) 
AA.—On leaves and twigs. Frontal tubercles exceeding vertex; cauda not shorter 
than hind tarsal II; body pale green, black dorsal patch in alata; cornicle longer than 
twiceshindstarsaletien (pi 340) sceewceeeeerereee cee eee The Green Peach Aphid (Myzus persicae) 
Pear—see Apple 
Peas (Pisum sativum) 
A.—Cornicle as thick or thicker than hind tibia, slightly longer than III, reticulated 
next to tip as far as .15 to .20, or for same length as hind tarsal II; base of VI same 
length vas) hind tarsal elle (9.9324) eee The Potato Aphid (Macrosiphum solanifolii) 
AA.—Cornicle more slender than hind tibia, slightly shorter than III, not reticulated; 
base of VI twice as long as hind tarsal II. (p. 320)......The Pea Aphid (Macrosiphum pisi) 
Pine (Pinus sp.). On needles, twigs, cones or bark of limbs. 
I. Limber (Pinus flezilis) 
A.—On needles, at bases. Very agile. Body apple-green without dusky spots; an- 
tenna five-segmented; cornicle a mere ring; rostrum obtuse, with V vestigial. (p. 15) 
ai Bee ee ee Pea lee RT Se I Aap Mette eR ere Bin POR VO (E) Lager eayeie 
AA.—On twigs. Not agile. Body brown; antenna six-segmented; cornicle mammi- 
form;; rostrum lancelike, with V distinct. 
B.—Dorsum marked with powdery pattern; hairs on dorsum not minute, .05 to 
.07; cornicle base broader than length of hind tarsal II; rostral IV .12 to .18; 
antennal III .40 to .50. 
C.—Hairs on hind tibia .04 in aptera, hardly as long as half diameter of 
tibia; .06 to .07 in alata, fully as long as diameter of tibia. (p. 22)..................-. 
sh aN acne tae a The Spotted Short-haired Limber Pine Aphid (Cinara apini) 
CC. —Hairs on hind tibia in aptera .06 to .11, .6 to 1.5 times as long as di- 
ameter of tibia; in alata .09 to .11, once to 1.5 times diameter of tibia. (p. 
OD eee ort Pere see eee The Spotted Long-haired Limber Pine Aphid (Cinara villosa) 
BB.—Dorsum not powdery; hairs on dorsum minute; diameter of cornicle base 
less than half length of hind tarsal II; rostral IV .20 to .22; antennal III .80 to 
SOON (pi SO) ces tee cree eee The Black Limber Pine Aphid (Cinara flexilis) 
II. Lodgepole (Pinus contorta var. murrayana) 
A.—On needles. Cornicle small mammiform or mere ring; rostrum obtuse, with V 
vestigial. 
