354 APHIDS OF THE ROCKY MOUNTAIN REGION 
and cubitus. Wax glands consist of single row of facets surrounding an irreg- 
ular area; feebly developed. 
Genotype (fixed by Matsumura, 1917), Gobaishia japonica Matsumura. 
[Genotype Gobaishia japonica Matsumura] 
Gobaishia japonica Matsumura, 1917:76; Mordvilko, 1935:118. 
Not described on account of unavailability of specimens. 
Gobaishia ulmi-fusa (Walsh and Riley) 
Pemphigus ulmi-fusus Walsh and Riley, 1869:109, footnote; Patch, 1910b:220. 
Gobaishia ulmi-fusus, Hottes and Frison, 1931a:359; Gillette and Palmer, 1934:213. 
Fundatrix. Body length 2; hind tibia .35; hind tarsal II .10; antenna .26; rostrum at- 
taining between Ist and 2d coxae. 
Alate Vivipara. Body length 1.45; hind tibia .55; antenna .60-.70; rostrum as in aptera. 
. Bales 
a ie om en7-9 9) (sen.6-10) | 
ui 
oe 
Fig. 424. A eeee ulmi-fusa 
Collections. In spindle-shaped baglike galls about 25 mm long on upper 
surface of leaves of red or slippery elm (Ulmus fulva). Colorado: Longmont. 
Fundatrices and alate viviparae July 15. (Host plant is rare in this locality.) 
Tribe Pemphigini Baker 
Baker, 1920a:68. 
Characters. As given under Eriosomatinae, in description and key to tribes. 
Key to Genera of Pemphigini 
1. Fore wing with media usually once-forked (p. 355).............-sccsecccstsccssosssscssnccsccesnscsenes Asiphum 
Fore wing with media Sim ple :222.c0hsc...s.0<.c--ccecasoseccsesuseibocecesssscensca/cbsctergutelavczen acest das een tene oe nena 2 
2. Vertex in aptera, with median hornlike projection, in alata merely 
somewhat, produced. (p. 357) | <ccscssecccccesehccss-ccctactugsuaceosslusesitekesscecectassecteccsedacscteseet thes eee Cornaphis 
Vertex but, slightly: cOnVOX: <....ci.cc20.-050cs.---scccbnenseateceresstedestocsesodsuacscocesescecabedeeecelepteesten tama ace 3 
3. Unguis bearing sensoria and in alate fundatrigenia longer than 
base cof, ViI«(p.4358), ecctecec pede at savene sn cscs case tte cw tte ee ect ct eset ate esa eee ken nccn tent ee Mordvilkoja 
... Unguis not bearing sensoria and in all alate viviparae shorter than base of VI.................. 4 
4. Antenna of fundatrix four-segmented. Living in true galls (p. 358)............--....... Pemphigus 
Antenna of fundatrix five-segmented. Not living in true galls.............2..22.....sssscscsceeceseseeseeees 5 
5. Wax glands on dorsum of mesothorax of alata large, i.e., with diameter equal 
to intervening distance. Fundatrix not in gall by herself (p. 366)......................+. Prociphilus 
Wax glands not well developed on dorsum of mesothorax of alata, i.e., with 
diameter less than distance between glands. Fundatrix in a gall by herself 
(except patchii Gillette) < (ps, S69) once. crttec race ore cce cece aces encores ee teneecceae re tsea teeta ee ee Thecabius 
Genus Asiphum Koch 
Koch, ena ete Gerstaecker, 1859:249 (type fixation) ; Baker, 1920a:75; Theobald, 
1929: 21 
Characters. Vertex convex; frontal tubercles lacking. Wax plates composed 
of many equal-sized facets surrounded by chitinous ring; present in alate 
vivipara. Antenna five-segmented in fundatrix, six-segmented in alate vivi- 
para; secondary sensoria transverse. Cornicle absent. Cauda rounded, semi- 
lunar. Fore wing with media once-forked; hind wing with both media and 
cubitus present. 
Living in pseudo galls on leaves. 
Genotype (fixed by Gerstaecker, 1859), Aphis populi Fabricius (=tremulae De 
Geer). 
