392 APHIDS OF THE ROCKY MOUNTAIN REGION 
F.—IV shorter than III. 
G:—III longer than’ cornicle® (pi 241) cc2.-cec-scenccueseeeeeden eens 
Wake Mee Ne Re The European Raspberry Aphid (Amphorophora rubi) 
GG.—III coequal with cornicle (p. 245)........---:--:csseccescereeeeeeeeee 
Bs cee ae sea Ee a ne eee tera cade Amphorophora utahensis 
FF.—IV coequal with III. (p. 232).............. Amphorophora bonnevilla 
EE.—Cornicle dusky; veins bordered. (p. 244).......-....----csscsscossssenceseneecenee 
cd FEM cs suscsast aaleee ete test eas an ane rc eos Ne eae Amphorophora tigwatensa 
CC.—Cornicle cylindrical; cauda shorter than twice length of hind tarsal II. 
(P9342) Bers ee sec ielesecas suaepan est aacaceetcsce eee enen ae eee The Foxglove Aphid (Myzus solani) 
Bluegrass—see Grass 
Blue Spruce—see Spruce 
Boxelder (Acer negundo) 
A.—Body large, 3 long; antenna longer than body; cornicle’ brown, much longer than 
hind tarsal II; frontal tubercles well developed. (p. 88).................... Drepanosiphum braggii 
AA.—Body medium in size, hardly 2 long; antenna shorter than body; cornicle pale, 
shorter than hind tarsal II; frontal tubercles absent. (p. 98).............. Periphylus negundinis 
Broccoli—see Cabbage 
Cabbage, Broccoli and Cauliflower (Brassica oleracea) 
A.—Body powdery; frontal tubercles not exceeding vertex; cornicle swollen, shorter 
than hind tarsal II, sensoria about 50 on III of alata. (p. 194) ............2c0.eeecccceeeeeceeeeeeeeeeeeees 
Oe Aa ae aE APO rcs RET eh eae Ree The Cabbage Aphid (Brevicoryne brassicae) 
AA.—Body not powdery; frontal tubercles exceeding vertex; cornicle much longer 
than hind tarsal II; sensoria 10 to 15 on III of alata. (p. 340)........:--:c:cscececcccceceseccecncneneeees 
Sree Ac ae open PR ty lee ee hat ai Be eae The Green Peach Aphid (Myzus persicae) 
Carnations (Dianthus caryophyllus) 
Body pale green, alata with dorsal dark patch, sometimes broken, on abdomen; 
frontal tubercles converging; cornicles elongate, either cylindrical or slightly swol- 
len; cauda once to twice as long as rostral IV-+V and third to half of distance 
ACTOSS; CY. ES0,( P0340) sete ete cewte cecccs tee teee nce ee The Green Peach Aphid (Myzus persicae) 
Cauliflower—see Cabbage 
Cedar, Rocky Mountain Red or Juniper (Juniperus scopulorum and 
utahensis ) 
A.—Large hairy forms 2 to 3 long. On bark of twigs and small limbs. 
B.—Hairs on hind tibia short and inconspicuous, .05 long, shorter than diameter 
OF tibia. ps 26). cei eevee cases secrete eee oe a Cinara burrilli 
BB.—Hairs on hind tibia .08 to .10 long, hardly as long as diameter of hind 
Ei biases (pst 44) sesses ce cee ener eee eee The Powdery Juniper Aphid (Cinara pulverulens) 
BBB.—Hairs on hind tibia .17 to .25 long, twice as long as diameter of tibia. 
Gop BD ets et iar eee eae Ae The Rocky Mountain Juniper Aphid (Cinara sabinae) 
AA.—Aphids not large and hairy, smaller than 2. On needles or twigs. 
B.—Body hemispherical, appearing as minute drop on upperside of needle. Hind 
tibia and antenna shorter than half of the body length; frontal tubercles not 
developed. (p. 225)............ The Hemispherical Juniper Aphid (Siphonotrophia gravida) 
BB.—Body not as above; normal; antenna longer than body; hind tibia nearly 
as long as body; frontal tubercles well developed, exceeding vertex. (p. 238)...... us 
oe ne eas Man fe i eh The Long-legged Juniper Aphid (Amphorophera morrisoni) 
Celery (Apium graveolens), Cowparsnip (Heracleum lanatum) and 
Garden Parsnip (Pastinaca sp.) 
A.—Frontal tubercles not exceeding vertex; antenna shorter than body. 
B.—Abdomen with supracaudal process in aptera, median tubercle on terminal 
segment in alata; dorsum of aptera rugose. 
C.—Cornicle swollen. é 
D.—Supracaudal process triangular, as long as cauda; unguis shorter than 
1.5 times’ base of(- V1 (p34 196)2-52. sa ee ee Cavariella aegopodii 
DD.—Supracaudal process knoblike, much shorter than cauda; unguis 
3.5 to 4 times as long as base of VI. (p. 197) ..........:cescescecseeceeeeees Cavariella essigi 
CC.—-Cornicle cylindrical) .(p..198)..eee Cavariella theobaldi 
BB.—Terminal segment without supracaudal process or tubercle. 
