SUBFAMILY APHINAE 337 
Alate Vivipara. Head and thorax black; abdomen yellow-green, usually with dorsal and 
ventral bands and lateral areas, especially anterior to cornicles, bands often coalesced to form 
dark dorsal patch on abdominal III, IV and V; antenna black; cornicle, cauda, anal and 
genital plates and tip of rostrum dusky; legs brownish with tarsi and tips of tibiae black. 
Otherwise same as apterous vivipara except as figured. 
Collections. On leaves and stems of columbine (Aquilegia sp.), Asparagus 
sp., Aster sp., celery (Apiwm graveolens), easter lily, calla lily, cyclamen, oxalis, 
potato (Solanum tuberosum), dock (Rumex sp.), Vinca sp., Viola sp. and water 
hyacinth (Piaropus crassipes). Colorado: (in greenhouses), Fort Collins and 
Boulder. Idaho: Twin Falls. Utah: Logan. Apterous summer viviparae Sept. 14 
to April 30, alate viviparae (rather rare) Oct. 25 to May 6; very common. 
(50 - 58) (sen ») 
TALS: ALD pee UY p fe 
' 43~45) a 
Pilea eons Co NSN SOUT ae LE 
37-40) Cea CET et a REE RET 
canete'30-39 Sh TS (Alate ce nl aM 
= 
gd “Gen 17 
te 58) ; 
hdTace  \ 8 iS 
; rF g 
Fig. 404. Myzus circumflexus 
Type. British Museum. 
Chief Distinguishing Characters. Color pattern of both apterous and alate 
viviparae (dorsal patch on alate vivipara and U-shaped marking on apterous 
vivipara on green body), short cauda (on median line, about same length as 
rostral IV-++V), usual presence of sensoria on IV in alate vivipara and short hind 
tarsal II (shorter than rostral IV+V). 
Myzus langei Essig 
The Water-cress Aphid 
Myzus langei Essig, 1936:70; Mason, 1940:11. 
Apterous Vivipara. Dark brown; dorsum rugose; appendages brownish with tarsi and 
tips of segments blackish; cauda and cornicle blackish. Body length 1.2-1.3; across eyes .33; 
antenna .95; hind tibia .50-.55; rostrum attaining 2d coxa. Frontal tubercles strongly devel- 
oped and converging. Cornicle cylindrical to very slightly broader in distal half, straight to 
somewhat recurved. Cauda tapering and bearing 2 pairs of lateral hairs. 
Alate Vivipara. Head and thorax black; abdomen dark brown; appendages pale yellow- 
ish to dusky with tips of segments blackish; cauda, anal plate and cornicle blackish. Body 
length 1.25-1.50; across eyes .35; antenna 1.40-1.50; hind tibia .80-.85; rostrum attaining 2d 
coxa. Cauda and cornicle as in apterous vivipara. 
Alate .22- 30 
Co, ) to. a 
a MADE! nee oe AYR 
sen.8-10 
Vy) 
f ON a i5 
25-27 
Fig. 405. Myzus langei 
Collections... On leaves of Roripa aquatica. Colorado: Fort Collins. Alate 
and apterous viviparae Aug. 20 and Sept. 23; rare. 
Cotypes. Essig Collection. 
Chief Distinguishing Characters. Dark brown body, cylindrical, recurved 
cornicle, number of lateral hairs on cauda (not more than 2 pairs), shortness of 
antenna in aptera (shorter than body) and wing veins not clouded. 
