APHIDS .OF THE ROCKY MOUNTAIN REGION 
~~) 
aN 
: Myzocallis punctata (Monell) 
The Clear-winged Oak Aphid 
Callipterus punctatus Monell, 1879:30. 
Myzocallis punctata, Gillette and Palmer, 1931:890. 
Characters. Similar to M. discolor or more especially to alhambra, differing 
in the absence of the banding of the forewing, leaving only the tips of the veins 
slightly smoky and the absence of dusky markings on body. 
Sexuales. Similar to those of M. alhambra even in body markings, differing only in the 
wing markings of the male which consist of the dusky vein tips. 
Collections. On Quercus alba, Q. macrocarpa, and Q. sp., on leaves. Colo- 
rado: Fort Collins and Manitou. Utah: Glendale. Alate viviparae May 25 to 
Oct. 20, sexuales Oct. 18 to 20; fairly common. 
Type. Davis Collection. 
Myzocallis robiniae (Gillette) 
The Locust Aphid 
| Cornicle 
eet 
Latera/ 
tubercle 
Callipterus robiniae Gillette, 1907:395 and 1908b:20. 
Myzocallis robiniae, Gillette and Palmer, 1931:891. 
Alate Vivipara. Yellow or greenish yellow; with a pair of dorsal and of lateral powdery 
lines or rows of spots, one on each segment extending from antennal bases to tip of abdomen; 
antenna annulated; tarsi, tips of tibiae, a spot near distal end of hind femur, and tip of 
rostrum black; cornicle and cauda pale. Wings hyaline with dusky spot at base of stigma; 
fore wing with radial sector faint, media twice-forked. Body length 1.6-1.9; hind tibia 75-1; 
antenna 1.3-1.6. Hairs inconspicuous except on cauda and anal plate; long and capitate in 
nymphs. Abdominal I to V each with lateral tubercles. 
Ovipara. Apterous. Pale green with numerous dusky spots, each bearing a long capi- 
tate hair, and two dorsal rows of short dashes also lateral areas blackish; antenna after III 
and distal half of tarsi blackish; legs more or less dusky. Abdominal VI to VIII prolonged 
forming an ovipositor. Body length 1.9; antenna .95-1.1; hind tibia .50-.60, somewhat swollen 
on proximal two-thirds and bearing scattered sensoria along nearly entire length. 
Male. Alate. Head and thorax black; abdomen light green with short dorsal bands and 
lateral areas, usually on all segments, black; white powdery dorsal and lateral lines as in 
alate vivipara; antenna brownish, somewhat annulated; legs pale with distal half of tarsi 
black. Body length 1.5; antenna 1.1-1.6. Abdominal I to V each with lateral tubercles. 
Collections. On leaves of Robinia neomexicana and R. pseudo-acacia. Colo- 
rado: Fort Collins, Boulder, Denver, Trinidad, Sugar City, and Grand Junction. 
Utah: Throughout state. Alate viviparae June 10 to Oct. 2, sexuales Sept. 21 to 
Nov. 9; common. 
Type. U.S.N.M., No. 41935. Paratypes, Colo. Agr. Exp. Sta. Collection. 
Myzocallis tiliae (Linnaeus) 
The Linden Aphid 
Aphis tiliae Linnaeus, 1758:452. 
Callipterus (Eucallipterus) tiliae, Davis, 1909a:33. 
Alate Vivipara. Yellow; with black lateral vittae on head and thorax, continued on ab- 
domen by medially broken black bands and lateral areas; antenna annulated with I, II and 
III black. Fore wing with anterior margin and tips of veins smoky, median and anterior por- 
tion of stigma paler; legs mostly pale with femora and knees dark; cornicle slightly dusky; 
rostrum, cauda and anal plate yellow. Body length 2; hind tibia .9; hind tarsal II .15; an- 
tenna 2-2.19. Frontal tubercles slightly developed; vertex with a pair of tubercles close to 
