86 APHIDS OF THE ROCKY MOUNTAIN REGION 
Key to Species of Drepanaphis 
1. Dorsal tubercles on abdominal I developed into fingerlike projections. ................--ss-ssceseseees 2 
-; ‘Dorsal tubercles on abdominal I undeveloped coon c occ ce nance sa scecene eens ea one eee ee 3 
2. Dorsal tubercles on abdominal I, II and III not all same size (p. 86).................. acerifoliae 
Dorsal tubercles on abdominal I, II and III all same size (p. 86)................-...-... granovskyi 
3. Dorsal tubercles on abdominal III .22-.30, long, united more than halfway 
Gees ap Nace ote ed Roel Dn eek ee a Ae Shick eR ae AN Ite oh Aad ME a ee 2 Meith Ae oe cca spicatum 
Dorsal tubercles on abdominal III .07-.12 long, united very shallowly, 
lessvthan  halti:ways'Cp 987 )oe-sosctctac ococct ee ate nce ey eee cree soccer sus ens eee oe utahensis 
Genotype Drepanaphis acerifolii (Thomas) 
The Maple Aphid 
Siphonophora acerifolii Thomas, 1877:4. 
Drepanaphis acerifolii, Baker, 1923:286; Hottes and Frison,, 1931a:246 (description of 
sexuales); Gillette and Palmer, 1931:912. 
Alate Vivipara. Olive-green to pale sordid greenish or brownish; thoracic lobes brown; 
cornicle pale greenish to brown; appendages sordid to greenish. Fore wing with margin of 
stigma, base of radius and tips and borders of all veins except first anal dusky; however, 
borders may be faint or, in mounted specimens, even invisible. Body length 2.3-2.5; across 
eyes .50-.52; hind tibia 1.1-1.4; hind tarsal II .12-.15; antenna 3.5-3.75, secondary sensoria 
large, oval-transverse, with cilia, arranged in a single row; cornicle usually carried at right 
angle to body. Dorsum with a pair of long fingerlike tubercles on abdominal I and on III 
(slightly united at base), a pair of shorter ones on II and on IV. Hairs very inconspicuous 
on antenna, minute, about .01 long. Fore wing with veins bordered with smoky; stigma dusky, 
with pale center. Rostral IV+V .11, hardly attaining 2d coxa. 
Ovipara. Apterous. Dusky green fading anteriorly and posteriorly to sordid pale green- 
ish. Terminal abdominal segments drawn out into long ovipositor. Body length 2.5-2.7; hind 
tibia 1.15; antenna 3. Hairs capitate, .10-.15 long on body and vertex. 
Male. Alate. Head and thorax pale sordid to medium brown; abdomen pale greenish with 
black dorsal patch on abdominal III, IV and V. Dorsal tubercles on abdominal I often poorly 
developed. Otherwise as in alate vivipara. Body length 1.5; hind tibia 1.15; antenna 3.5. 
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Fig. 92. Drepanaphis acerifolii 
7st re 
Collections. On leaves of Acer saccharinum, solitary. Colorado: Greeley, 
Boulder, Denver and Fort Collins. Utah: Bountiful, Logan, Provo and Salt Lake 
City. Fundatrices May 12 to June 1, alate viviparae May 26 to Oct. 2, oviparae 
Sept. 30 to Nov. 7, males Sept. 30 to Oct. 2; common. 
Type. Ill. Nat. Hist. Surv. Collection, lectotype, No. 7168; paratype, No. 
7169. 
Drepanaphis granovskyi Smith and Knowlton 
Drepanaphis granovskyi Smith and Knowlton, 1943:173. 
Alate Vivipara. ‘‘Pale whitish yellow, occasionally with a greenish tinge on abdomen; 
thorax fuscous’’; appendages pale with tarsi and tips of tibiae and of antenna dusky. Fore 
wings with veins slightly tipped with dusky and with dusky area near proximal end and near 
distal end. Abdomen with dorsal tubercles on I, II, III and IV. Body length 1.25-1.50-*'1.60”’; 
