SUBFAMILY APHINAE 343 
niata), in flower beds and greenhouses. Colorado: Fort Collins. Utah: Logan. 
Idaho: Twin Falls and Buhl. Alate and apterous viviparae all the year around 
in greenhouses, outdoors April 15 to Oct. 10; not very common. 
Type. Location unknown. Type of Myzus pseudosolani Theobald in British 
Museum. 
Chief Distinguishing Characters. Intersegmental broken dorsal dashes in 
alate vivipara, dark green area at base of each cornicle in apterous vivipara, 
rather large flange and indistinct transverse reticulation on cornicle. The frontal 
tubercles approach Macrosiphum but the hairs and cauda are like Myzus. 
This species has been placed under M. convolvuli (Kaltenbach) by Mason 
(1940:8) but our specimens disagree with Kaltenbach’s description as follows: 
III not “gekerbt,” absence of dorsal patch in alate vivipara, cornicle not “thicker 
before tip.” The description of convolvuli fits M. persicae (Sulzer) much better 
and is stated by Hille Ris Lambers (1946:197) to be that species. 
Myzus timpanogos (Knowlton) n. comb. 
Utamphorophora timpanogos Knowlton, 1946b:1; Hottes, 1950b:38. 
Alate Vivipara. (Cleared and mounted on slide), head and thorax dark; abdomen without 
markings; cornicle and appendages especially tibiae, dark; cauda slightly dusky. Body length 
2.4; across eyes .43; hind tibia 1.2-1.5; antenna about 2.2-2.4; rostrum attaining between Ist 
and 2d coxae. Hairs minute and sparse on appendages and body. Antennal tubercles in nymph 
showing protuberance, suggestive of fingerlike tubercle of Phorodon. 
Apterous Summer Vivipara. Medium green; cornicle,. rostrum and legs brown; cauda 
and anal plate slightly dusky; tarsi, antenna beyond III and tips of tibiae black. Body length 
2; across eyes .40; antenna 2; hind tibia 1.1; rostrum attaining 2d coxa. Cornicle swollen, 
without reticulation. Cauda tapering to spatulate, bearing 2 pairs of lateral hairs and a single 
preapical one. 
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Fig. 412. Myzus timpanogos 
Collections. On leaves or stems of Monarda and in sweeps from Carex*. 
Utah: Aspen Grove, Mount Timpanogos. Colorado: Skyway. Alate summer 
viviparae and nymphs June 13; apterous viviparae June 13 and July 21; rare. 
Type. Knowlton Collection. 
This species strikingly resembles M. monardae and Phorodon menthae on 
account of the tendency to fingerlike projection on antennal tubercles especially 
in nymph. However, ii differs in the cauda which is elongate (.20-.25 on median 
line instead of .10-.12) and spatulate’ instead of tapering. 
*The host plant for this species seems to be uncertain. On “Monarda (?)’’ were taken 
alate viviparae and alatoid nymphs, showing unquestionable development on that 
plant; but was it Monarda? In sweeping Carex were taken apterae which obviously 
could hardly have been strays or migrants but they were not observed on the Carex. 
The broad rostral IV-+-V indicates a feeder on grass or sedge. 
