SUBFAMILY APHINAE i 83 
forms. Body with spinelike hairs. Fore wing with media usually twice-branch- 
ed, frequently deformed; hind wing with cubitus faint or absent. Living on 
leaves and stems of Gramineae and Cyperaceae. 
Genotype (fixed by Gillette, 1917), Brachycolus ballii Gillette. 
Key to Species of Thripsaphis 
IRE ICELeSLOLcaptCrasnotuwithewartlike projyeGtiOnsssc. tec ss. oh ee. cc oeess one sere ee ee 2 
Menrexrot aptera with Waltiike projyectiOnu 25sec es eee cee ete ee ee ee 3 
2. Vertex of aptera moderately convex; antenna of aptera without secondary 
SENSOLLA MCh 65) e ere eee eee: Sete ae Pre tere eh Es Ne ap ee ne 2 Leeda ee ee eee ball 
Vertex of aptera strongly convex; antenna of aptera with secondary 
SERGE TOET Ly oh 0) pe ae as 4 re Ree, cad 68 We Bee, NR nae | os Paes Ree ee SS RM UN ARE Eg Gate Oe oe producta 
3. Vertex with wartlike projection rising abruptly; III of aptera with 
SRST Gap, CE Se I A Se 5 PES ER Om ese We GIL PSs eee Oa re ee verrucosa 
Vertex with wartlike projection not rising abruptly; III of aptera not 
Deapingeseivsorras (AS 4) mate tee oe ater meee en OT oe A eae et toe ec Ls brea ee utahensis 
Genotype Thripsaphis ballii (Gillette) 
The Thrips Aphid 
BUTTE ETID CAS YUVA 2 ee AUE3E 
19-26 Pvenese Viv. 13 I 
AL=I3~ IFIS Ia, Fe Tee 
io > 
Fig. 88. Thripsaphis ballii 
Brachycolus ballii Gillette, 1908b:67 and 1909a:119. 
Thripsaphis ballii, Gillette, 1917c:194; Gillette and Palmer, 1931:909. 
Apterous Vivipara. Head and thorax dusky; abdomen pale greenish with crossbands and 
speckles; slightly pulverulent; legs slightly dusky. Body 2-2.5 by .75-.80; dorsoventrally com- 
pressed thripslike; vertex rounded; frontal tubercles not developed; antenna imbricated; body 
surface very minutely dentidulate. Hind tibia .40-.70; antenna .80; cauda .09 entire length, 
.04-.05 from neck. Legs stout. 
Alate Vivipara. Color same as in apterous vivipara. Body length 1.7 by .5; hind tibia 
.55; antenna 1.05. Hairs spinelike, minute, about .01-.02 long on antenna and body. Cornicle 
a mere pore on abdominal VI. Rostrum very broad, barely surpassing lst coxa. Anal plate 
bilobed; tergite VIII broadly rounded and projecting posteriorly usually covering cauda. 
Ovipara. Same as apterous vivipara except with tufts of secretion on venter of tip of 
abdomen and hind tibia which is swollen and bearing numerous sensoria on nearly entire 
length. 
Male. Apterous. Body length 1.10; hind tibia .30; antenna .80; sensoria present on III 
and V. 
Collections. On leaves and stems of Carex webraskensis. Colorado: Fort 
Collins and Rocky Ford. Utah: Henefer. Apterous summer viviparae April 29 
to Sept. 17, alate viviparae May 27 to July 13, oviparae Oct. 30 to Nov. 9, males 
Oct. 14 to 17; common. 
Type. U.S.N.M., No. 41933. Paratypes, Colo. Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Short antenna, number of sensoria (about 
7) on III of alate vivipara and (none) on III of aptera, moderately produced 
vertex, absence of the cubital vein in hind wing, short and broadly rounded 
tergite VIII and stout femora of apterous vivipara. 
Thripsaphis producta Gillette 
Thripsaphis producta Gillette, 1917c:196; Gillette and Palmer, 1931:910. 
Apterous Vivipara. Blackish, due to heavy banding and mottling. Dorsal surface bluntly 
denticulate to papulate; appendages black. Body 2 by .7; hind tibia .45-.50; antenna .95-1.2. 
Alate Vivipara. About the same in color and measurements as in apterous vivipara or 
with appendages slightly longer. Secondary sensoria on antenna round; antennal imbrications 
