SUBFAMILY APHINAE Al 
dusky in broken bands and intersegmental dashes and spots and lateral areas; venter pale or 
usually with segments V and VI or to VIII with dusky bands, more or less broken; with 
dorsal tubercles rudimentary to somewhat developed; antenna pale except I and II and VI 
and tips of IV and V; tibiae except tips, cauda and cornicle including area around its base 
pale. Fore wing marked with dusky spots too broken for bands but with radial cell clear. 
Body length 1-2; antenna 1.5-1.8; hind tibia .75-.95; rostral IV+V .08, attaining between Ist 
and 2d coxae. Cornicle truncate. Cauda wartlike; anal plate well indented. 
Ovipara. Apterous, with segments posterior to cornicles extended proboscislike. Yel- 
lowish, marked with divided dorsal bands and lateral areas; venter pale; all appendages and 
cornicle, with area surrounding base, pale. Body covered with long capitate hairs. Length of 
body 1-1.50; antenna about 1.50; hind tibia .60-.85, considerably swollen for nearly entire 
length and bearing numerous rather large, flat, indistinct sensoria. 
Male. Alate. Head and thorax dark; abdomen yellowish, but mostly covered with broad 
divided dorsal bands and lateral areas; venter dusky posteriorly to abdominal IV; cornicle, 
anal plate and cauda pale; tibiae pale except tips; antennal I, II and VI and tips of III, IV 
‘and V dusky. Fore wing as in alate vivipara. Body length 1.30-1.50; antenna 1.5-2; hind tibia 
.60-.85. 
0 GEESE AY 0 FRITS LAIST GUE ANTALIS 
4} 56 sen, |5- 19 30-.38 sen. 5-3 30-.32 sen, 4-7 A257 
Fig. 71. Myzocallis alhambra 
Collections. On leaves of Quercus alba, Q. gambelli, Q. utahensis and Q. 
macrocarpa. Colorado: Fort Collins, Glade Park, Glenwood Springs, Salida, 
Manitou, and Ouray. Utah: Common. Alate vivipara June 6 to Oct. 23, sexuales 
Sept. 27 to Oct. 23, common. 
Type. U.S.N.M. Type of coloradensis Gillette and Palmer, U.S.N.M. Para- 
types, Colo. Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Number of sensoria on III of alate vivi- 
para (2-6), length of unguis (1.5, rarely 2 times base of VI), pale color of the 
cornicle, pale to dusky venter on posterior half of abdomen only, pattern of 
markings on the fore wing and the absence of strongly developed dorsal 
tubercles. 
This form differs from the original description of alhambra in the usual 
presence of broken dusky dashes on venter of abdominal V, VI, VII and VIII 
though a few mounted specimens appear immaculate; but about a dozen speci- 
mens from California (from Essig Collection) with sensoria from 2-6 on III 
all showed at least traces of ventral dashes. 
This species may, on further study, prove to be the same as M. discolor; 
indeed Monell stated in correspondence that great variation in number of 
sensoria could sometimes be found even in the two antennae of the same indi- 
vidual. The two forms are here retained as distinct mostly on account of the 
paler markings of the western specimens studied also considering the absence 
of specimens so far collected here showing the larger number of sensoria. 
