SUBFAMILY APHINAE 61 
Data for above description and drawings obtained prc description by 
Davis (op. cit.) and from specimens loaned by Hottes. 
Type. Davis Collection. 
Stegophylla quercifoliae (Gillette) 
The Woolly Oak Aphid 
uda 
EP te es 
Inal'p) 
=Cornicie 
was 1S 06-1 oe 13 1-13 -o% 
37—.A0 
96 raaors a 
i2oo8 25000 
L 
f =22  .02 
Ties 23 diate sen. 4- 3-32 Sen.3-7 Sen. Meagan gr 
aw ais SI aa eT TT} Sen..5-7 
— JB—25 
Fig. 60. Stegophylla quercifoliae 
Schizoneura querci (Fitch) (misidentification), Cowen (in Gillette and Baker), 1895: 
11 
Phyllaphis quercifoliae Gillette, 1914a:272. 
Stegophylla quercifoliae, Gillette and Palmer, 1931:886. 
Apterous Summer Vivipara. Head and thorax yellowish to yellowish brown; abdomen 
yellow or yellowish green covered with flocculence; eyes bright red; appendages yellow to 
brown, dusky distally. Body length 1.1-1.5; hind tibia .30-.40; hind tarsal II .10; antenna .50. 
Cornicle a mere pore on a darkened area, hardly raised. Hairs very sparse .01-.02 long. An- 
tenna imbricated, unguis fingerlike; rostrum slender but without needlelike point, barely at- 
taining 2d-3d coxa. 
Ovipara. Apterous. Head dusky; rest of body pale yellowish green to straw-yellow, 
some individuals pink; flocculent; wax glands in 6 longitudinal rows, showing as minute dark 
dots on dorsum, 2 large circular wax plates on venter of abdominal V and VI and partially 
covering VII producing tufts of short wax threads which project beyond the margin of the ab- 
domen; appendages; especially hind tibia, cauda, anal plate and tip of rostrum dusky. Length 
of body 1.3-1.6; antenna .55-.65; rostrum surpassing 2d coxa, hind tibia swollen for nearly 
entire length and bearing numerous sensoria. Cornicle merely a raised pore on cone-shaped 
base. 
Male. Alate. Head and thorax blackish; abdomen pink to brownish yellow; powdery, 
with a few long cottony threads more or less covering appendages; appendages, cauda and 
anal plate blackish. Fore wing with media twice-branched; hind wing with but one cross- 
vein. Wing veins heavy and narrowly bordered. Length of body .95-1.05; antenna 1.10; hind 
tibia .60-.65. 
Egg. At first, pale green; later, black; covered with short fragments of waxy secretion 
taken from the dense patches produced by the ventral wax glands and placed here by the hind 
tarsi of the female just after she has laid the egg. Size .50 by .30. 
Collections. Quercus undulata and other scrub oaks, exposed on leaves or 
in folded leaves. Colorado: Southern part on both eastern and western slopes 
of the Rocky Mountains. Utah: Throughout the state. Apterous viviparae June 
30 to Oct. 7, sexuales Oct. 18; rather common. 
Type. U.S.N.M., No. 42813. 
Chief Distinguishing Characters. Single cross-vein in hind wing, length of 
rostral IV + V (.13-.14) and comparatively slender shape of the latter but 
without needlelike tip in ventral aspect. 
Genus Tamalia Baker 
Baker, 1920a:24; Gillette and Palmer, 1931:883. 
Characters. Frontal tubercles absent; antenna six-segmented, minutely 
denticulate and with narrow transverse sensoria. Tarsal I triangular (in lateral 
aspect). Cauda rounded, broader than long; anal plate entire. Eye in aptera of 
3 facets only; ocular tubercle present in alatae. Hairs simple. Fore wing with 
