80 APHIDS OF THE ROCKY MOUNTAIN REGION 
Key to Genera of Sa!tusaphina. 
lz Body. hairs flabellate (cccciccc epeccecp a aes cpa Ses og cree sae ee ee 2 
 § ‘Body hairs pointed s (ps 82) cok ex eee eet gate acc rae eee ee oe Thripsaphis 
2. Terminal tergite bifid, bearing cylindrical to pointed hairs. (p. 81)........-.-..0...... Saltusaphis 
Terminal tergite not bifid, bearing flabellate hairs, (p) SO). -ceee ee Iziphya 
Genus Iziphya Nevsky 
Nevsky, 1929b:314. ‘ 
Characters. Head and thorax elongated. Eye without ocular tubercle. An- 
tenna six-segmented, with spinelike hairs. Hairs on body and head flabellate to 
heavy-blunt, usually curved, arising from large tubercles. Cornicle truncate, 
on broad hairy cone. Cauda cordiform; anal plate divided. Tergite VIII not 
bilobed but heavily tuberculate. 
Genotype (monotypical), Iziphya maculata Nevsky. 
Key to Species of Iziphya. 
t. .Cornicle set-on ratsed comes (peeSO))) eee ere ee maculata 
Cornicle notiset on raised, GOne.s (p88 0) sateen eee italics. i tlabella 
[Genotype Iziphya maculata Nevsky ] 
Vertex 
apt. VIV 
e- 
Ynal led te 
to? 
Cornicle (After Nevsky) 
Fig. 83. Iziphya maculata 
Iziphya maculata Nevsky, 1929b:314. 
Apterous Vivipara. Greenish yellow, with dusky specks and blotches on dorsum, tending 
to form two vittae, transverse band between cornicles and on tergite VIII. Body length 
1.3-1.7; head long; vertex slightly convex; antenna 1.4, III .40, IV .21; V .24; VI .14+.26; 
cornicle with cylindrical portion .06 long, .05 wide and conical portion .05 long and .16 in 
diameter at base; cauda .10. 
Hairs on body throughout, flabellate, set on large tubercles, .03 long; on antenna setiger- 
ous; on legs cylindrical or setigerous. Anal plate divided; tergite VIII somewhat covering 
cauda and bearing flabellate hairs on large tubercles. 
Host. Cynodon dactylon, on leaves. Data for above description and draw- 
ings obtained from Nevsky (op. cit.) (Not taken in region.) 
Iziphya flabella (Sanborn) 
Chaitophorus flabellus Sanborn, 1904:37. 
Callipterus flabellus, Gillette, 1909a:120. 
Iziphya flabella, Gillette and Palmer, 1931:908. 
Apterous Vivipara. Pale yellowish green, with dusky specks and blotches tending to form 
vittae, especially on thorax and a pair of dorsal patches on abdominal IV and V; femora and 
knees dark; tibiae and cauda pale; tarsi and cornicle dusky. Body length 1.5-2; hind tibia 
.47-.54; hind tarsal II .14; antenna 1.4-1.6. Hairs flabellate, set on tubercles which are fairly 
conspicuous on terminal tergites. 
Alate Vivipara. Pale yellow-green with dark vittae on head and pronotum; meso- and 
metathorax black above and below; abdomen with irregular blotch on III, IV and V, a pair 
of blotches on VII, and VIII dark; femora, knees, tarsi and cornicle black; tibiae and cauda 
pale; fore wing with veins heavy, somewhat bordered and tipped with smoky. Measurements 
same as in aptera. Antenna with imbrications finely denticulate, without evident hairs; sec- 
ondary sensoria, round, fairly large to minute; rostrum obtuse, barely surpassing Ist coxa. 
Ocular tubercle lacking. Cornicle cylindrical to truncate on a circular base which bears 
flabellate hairs; entire surface finely denticulate. Tergite VIII rounded, entire, hardly pro- 
jecting over cauda; cauda knobbed, distal end truncate or bluntly rounded as usually seen, but 
