SUBFAMILY ERIOSOMATINAE 355 
Key to Species of Asiphum 
1. Fore wing smoky; hairs in aptera prominent, on antenna longer than diameter 
OLPATICENTIA MC PP GOO) ctecer cestode cceee ee dttetee ac ctccsseccncereeaeren seis rane-ccscecetenesecanssesarsuuncenatsiseatvesesoeeesss sacculi 
Fore wing hyaline; hairs prominent on antenna of aptera (p. 356)..............-.-::s-se-e tremulae 
.. Fore wing hyaline; hairs inconspicuous, not longer than diameter of antenna.................... 2 
2. Hind tarsal II of alata shorter than 1.5 times antennal IV; hind tibia shorter 
Phanesetimesel 1 LEC W355 ) dest cccck cscce sche eras ee a ee Ls eh pseudobyrsum 
Hind tarsal II of alata nearly twice as long as antennal IV; hind tibia 
BUTI OREMSRIONSEOS TEU TEC S55) foeccrtrcrccccrsecte cera racs eat casero ncncncceator se tateacer ees cetenecens mereatorveepscncenee .rosettei 
Asiphum pseudobyrsum (Walsh) 
The Poplar Leaf-purse Aphid 
Byrsocrypta pseudobyrsa Walsh, 1862:306. 
Pemphigus pseudobyrsa, Oestlund, 1887 :24. 
Schizoneura popull, (misidentification), Gillette, 1908e:1 
Asiphum pseudobyrsa, Gillette, 1914a:269; Hottes and Frison, 1931a:348: Gillette and 
Palmer, 1934:217, 
Fig. 425. Asiphum pseudobyrsum 
Fundatrix. Yellow-olive-green, head blackish; heavily powdered; appendages dusky. 
Body length 4; hind tibia .50; hind tarsal II .13-.15; antenna .55-.65 rostrum attaining 2d coxa. 
Alate Vivipara. Dusky to black; cottony; appendages pale yellow; venation faint with 
black line along subcosta. Body length 3.5; fore wing 3.50-3.75; hind tibia .65-.75; antenna 
.80-.97; permanent sensoria with cilia; rostrum attaining between Ist and 2d coxae. Wings 
hyaline; subcosta of fore wing bordered by black line; media usually once-forked, occasionally 
simple. Wax glands indistinct, composed of many equal-sized facets; present in alate vivi- 
para. Hairs inconspicuous, .04-.05 on vertex, tibiae and body. 
Collections. In pseudo galls of leaves of Populus sargenti*. Colorado: Grand 
Junction, Rocky Ford, La Porte, Denver, Longmont and Fort Collins. Funda- 
trices May 27 to June 18, alate viviparae June 16 to July 13; not common. Fun- 
datrix living in same leaf.as progeny but on underside of midrib with young 
locating on underside of branch veins. Second generation alate viviparae (fun- 
datrigeniae) all leave the tree, probably for an unknown summer host. 
Asiphum rosettei Maxson 
The Aspen Rosette Aphid 
Asiphum rosettei Maxson, 1934:40; Gillette and Palmer, 1934:218. . 
Fundatrix Hind Tarsus 
Slater es Sierceen 
eae Tum a 
Alate Viv. Sen. 1- a 
‘ POO ONAN MH Cee eTiiCe 
28 -.33 (sen. 
1-7) 13-16 (21 —94) 
e 426. Asiphum rosettei 
Fundatrix. (Mounted in balsam), head, appendages light brown. Body length 2.76; hind 
tibia .48; antenna five-segmented, .60. Hairs pointed and sometimes curved; on hind tibia and 
side of abdomen .05-.07 long. Rostrum attaining 2d coxa. 
*Note by Gillette (1914a:269) that host is Populus coccinea is an error. 
