SUBFAMILY APHINAE 273 
Collections. On leaves of Artemisia aromatica, Chrysothamnus nauseosus 
subspp. graveolens and typicus, Gaertneria tomentosa and Liatris punctata, also 
a collection of oviparae on Mentzelia oligosperma and Ambrosia artemisiaefolia 
structurally inseparable from this species. Colorado: Bellvue, Laporte, Boulder, 
Sand Creek Pass and Fort Collins. Utah: Throughout northern part of state. 
Apterous summer viviparae May 20 to Oct. 14, alate viviparae May 22 to June 
C35- -63) & 
(Sen. 1-2) 
S 
ne 
- 
(middTe) 
Fig. 328. Capitophorus wasatchii 
Cotypes. U.S.N.M. and Knowlton Collection. | 
Chief Distinguishing Characters. Absence of distinct stalk in hairs on body 
and vertex, relatively short cornicle (shorter than III), rather long cauda (longer 
than base of VI) with rounded tip, tip of rostrum acute but not needlelike and 
cauda without spatulate hairs and with not more than 2 pairs of lateral hairs. 
This species differs from the original description in the darker antenna 
(dusky usually from base of III instead of from middle of IV or only slight 
brownish distally on ITI). 
Capitophorus xanthii (Oestlund) 
Siphocoryne xanthii Oestlund, 1886:36 and 1887:71. 
Capitophorus xanthii, Knowlton, 1927d:238. 
Apterous Summer Vivipara. Pale greenish yellow with broken bands anu dashes of 
grass-green; cornicle, cauda and appendages pale to slightly dusky. Body length 1.7-2; hind 
tibia .80-.90; hind tarsal II .10; antenna 1.05-1.25; rostrum in ventral aspect, with needle- 
shaped tip, attaining 2d coxa. Hairs capitate or slightly funnel-shaped at tip, with slender 
stalk on vertex; sessile om antennal I and II; hardly visible on remaining segments; on hind 
tibia capitate to blunt; on body anterior to abdominal VII .02-.03 and funnel-shaped without 
stalk, not numerous or conspicuous; on abdominal VII and VIII funnel-shaped with stalk 
and .02-.03 long, rather numerous and noticeable. Cornicle swollen in distal half to twice as 
wide as narrowest part and smooth. Cauda tapering, with slightly constricted tip and bearing 
two pairs of lateral hairs and rarely a dorsal preapical one. 
Y O'D'OQ IMS OY ie, ) 
(.20~ €n 10-2) (18 ~-22) (sen.o-7) +0 
Hd, T; Py) 
Esti) 
Viv. 
Fig. 329. Capitophorus xanthii 
Alate Vivipara. Nymph. In autumn, light greenish yellow with conspicuous red dorsal 
blotch. Adult. Head and thoracic lobes brown; prothorax and abdomen pale greenish yellow 
to sulfur-yellow, with grass-green to dusky green dorsal bands on III, IV and V; antenna 
dark throughout, lighter on I and II; cornicle pale sordid; legs, anal plate and cauda pale 
yellowish; tarsi and tips of tibiae blackish. Body length .95-1.50; hind tibia .85-.97; antenna 
