APHIDS INFESTING ECONOMIC PLANTS 403 
Honeysuckle (Lonicera sp.). On leaves. 
A.—Cornicle absent; frontal tubercles lacking; antenna not longer than half body; 
sensoria narrow-transverse; media of fore wing simple; cauda rudimentary; body 
yellow, woolly. (p. 369).................... The Woolly Honeysuckle Aphid (Prociphilus xylostei) 
AA.—Cornicle present; frontal tubercles developed; antenna longer than half body; 
sensoria circular; media of fore wing twice-branched. 
B.—Cornicle cylindrical, sometimes broader at the base, marked with transverse 
wrinkles, as long as IV, 2 to 3 times length of hind tarsal II; cauda short, nearly 
semilunar, bearing short hairs; body orange to.clay color; powdery. (p. 114)........ 
Sal te ead Tb a ie Meee eee ey Oe Se aa Amphicercidus flocculosus 
BB.—Cornicle swollen. 
C.—Body dark olive-brown; cauda short, not longer than base of VI, taper- 
Siig COREL ACER NEAT TID, Thy 287) sdsercterecceiprs eon tireneceze ae Rhopalosiphum grabhami 
CC.—Body pale; cauda elongate, longer than base of VI. 
D.—Body pale yellow to yellow-brown. Cornicle not longer than III, 
not reticulated; sensoria present on IV in alata; cauda 1 to 1.5 times as 
long as hind tarsal II, bearing 3 hairs on a side. (p. 213) .........-.:.:cseeeseesee--- 
ROR SEE Pee ae The Honeysuckle and Parsnip Aphid (Rhopalosiphum conti) 
DD.—Body pale whitish green; cornicle longer than III, reticulated at 
tip as far as length of hind tarsal II; sensoria absent on IV; cauda 3 or 
more times as long as hind tarsal II, bearing 6 to 8 hairs on each side. 
Ee ge PPE SS eet Rent a or ae A ie Amphorophora crystleae 
Hop (Humulus lupulus). On leaves. 
A.—Cornicle 3 times as long as hind tarsal II, reticulated area as long as hind tarsal 
II; frontal tubercle without fingerlike process; sensoria 10 to 18 on III of alata. (p. 
Ce Rae SS ES Oe ait The Potato Aphid (Macrosiphum solanifolii) 
AA.—Cornicle 2 to 2.5 times as long as hind tarsal II, without reticulation; frontal 
tubercles with fingerlike projection; sensoria 23 to 27 on III of alata. (p. 344).............. 
enebestacbelien tht ee oeearenthe at ena. New i Mina Se a reo a ta The Hop Aphid (Phorodon humuli) 
Iris (Iris sp.). On bulb. 
Antenna shorter than body; sensoria numerous and tuberculate on III, present on IV 
in alata; cornicle shorter than 1.5 times length of hind tarsal II; cauda short, broad, 
bearing 2 hairs on each side. (p. 181) .............c:s:eccceeeceeeeeeees The Tulip Aphid (Aphis tulipae) 
Juniper—see Cedar, Rocky Mountain Red 
Larkspur (Delphinium sp.) 
A.—Body reddish yellow; antenna not longer than body; sensoria not tuberculate, 1 
to 4, on III of alata, absent in aptera; cornicle 1.5 times as long as hind tarsal II. 
G8 LS es sees pe ea ope os Sal ro PS The Russet-colored Larkspur Aphid (Aphis rociadae) 
AA.—Body green to dark brownish green, metallic; antenna longer than body; sen- 
soria 49 to 64 on III of alata, 11 to 38 in aptera, tuberculate; cornicle same length as 
hind tarsal’ II. (p.'285).4.-<--2......... The Green-bronze Larkspur Aphid (Kakimia wahinkae) 
Lily (Lilium sp.). On leaves. 
A.—Alata with dusky intersegmental lines and lateral areas, aptera immaculate, with 
deeper green blotch at each cornicle base; cornicle with 2 or 3 zpical striae. (p. 342) 
seg SE al Ne ce, De EOE OC Dg a eee Ee aan SRL ot The Foxglove Aphid (Myzus solani) 
AA.—Alata with dark dorsal patch or bands; cornicle without apical striae. 
B.—Aptera immaculate; cornicle usually swollen. (p. 340)........--..---:cssssceeeseecceeeeeeeeees 
Ofer dyn: EA A DAN, fe Ra et Lan As en eee oe The Green Peach Aphid (Myzus persicae) 
BB.—Aptera with dusky horseshoe-shaped marking on dorsum of abdomen; 
COUMICTENTIe VEFPS WO! LETI (1051550) coreeceste seca nenenectocesnccapeseneeetaastenenSnns nensenenesasnenceceecn rar esses 
The Crescent-marked Lily Aphid (Myzus circumflexus ) 
Limber Pine—see Pine 
Locust (Robinia sp.). On leaves. 
A.—Body black; antenna shorter than body; cornicle tubular, as long as IV, 2 to 3 
times as long as hind tarsal II; sensoria circular; cauda elongate, nearly parallel- 
sided anal platerentire.(p. 151) isos eo cette ence The Cowpea Aphid (Aphis medicaginis) 
AA.—Body yellow to yellow-green; antenna as long as body; cornicle truncate, very 
much shorter than IV, only half as long as hind tarsal II; sensoria oval-transverse; 
cauda knobbed; anal plate divided. (p. 74)............ The Locust Aphid (Myzocallis robinae) 
Lodgepole Pine—see Pine 
