SUBFAMILY ERIOSOMATINAE 369 
Fundatrix. Medium brown; flocculent; rostrum and appendages dark. Body length 2.5- 
4.5; hind tibia .70-.80; hind tarsal II .20; antenna .80-1; rostrum attaining 2d coxa. 
Alate Vivipara. Dark brown; flocculent; rostrum and appendages dark; wings slightly 
smoky. Body length 3; hind tibia 1.20-1.40; antenna 1.36-1.63; rostrum attaining abdominal II. 
Hairs on hind tibia numerous, .05, about as long as diameter of tibia. Wings slightly smoky, 
veins narrowly bordered. 
Apterous Summer Vivipara. About the same as fundatrix. 
Ovipara. Apterous. Golden yellow to brownish, lighter on head; appendages pale. Body 
length 1-1.33; antenna .26-.30, five-segmented, segments all about same length except VI 
slightly longer by length of unguis; hind tibia .16. 
Male. Apterous. Pale dusky green, lighter anteriorly; appendages pale. Body length 
-82; antenna .30, five-segmented ; hind tibia .16. 
Collections. As winter host Fraxinus pennsylvanica, Syringa* and For- 
sythia* on bark of twigs; summer host roots of Abies balsamea*. Colorado: Fort 
Collins. Fundatrices May 13 to 31, apterous summer viviparae May 15, alate 
viviparae May 26 to June 24 and Sept. 6 to Nov. 13, males Oct. 10 to 17; not 
common. 
Chief Distinguishing Characters. Long antenna (1.36-1.63), small meso- 
thoracic glands in alata, very slightly smoky wings, habit of a bark feeder, long 
hind tarsal II (.25-.31) and long rostral IV+V (.22-.26). 
Prociphilus xylostei (De Geer) 
The Woolly Honeysuckle Aphid 
Aphis xylostei De Geer, 1773:96. 
Prociphilus xylostei, Tullgren, 1909 :83; Mordvilko, 1935:92. 
Alate Vivipara. Fundatrigenia. Head and thorax black; abdomen yellow} woolly. Body 
length 2-2.8; across eyes .40-.45; antenna 1.10-1.40; hind tibia 1-1.40. One pair of small wax 
glands on posterior margin of head and a large pair on mesothorax. 
ee 
i A l 
40-50 sen.|9~-24 
Mésothoracic 
Glands 
Fig. 446. Prociphilus xylostei 
Collections. On underside of partly curled leaves of Lonicera involucrata. 
Colorado: Gould (near Cameron Pass). Alate viviparae Aug. 20; rare. 
Chief Distinguishing Characters. Habit of living in pseudo gall of partially 
curled leaves, length of antenna (III .40-.50), number of secondary sensoria on 
III (19-24) and on IV (5-9) and their absence on V and VI, length of rostral 
IV+V (.13), length of hind tarsal II (.27-.30) and rather long fine tibial hairs 
(.05, about as long as diameter of tibia). 
Genus Thecabius Koch 
Koch, 1856:294; Baker, 1920a:77; Maxson, 1923:324; Theobald, 1929:220. 
Characters. Antenna five-segmented in fundatrix, six-segmented in alata. 
Wax glands small on head of fundatrix; mesothoracic glands in alata with 
diameter much less than distance between them. Cornicle absent. Cauda semi- 
lunar, bearing 2-4 hairs. Hairs inconspicuous. Fore wing with media simple; 
hind wing with both media and cubitus. Living in pseudo galls (except populi- 
monilis in true galls); ftndatrix usually in a gall by herself (except patchii 
Gillette). 
Genotype (monotypical), Thecabius populneus Koch (synonym of Pemphigus 
affinis Kaltenbach). 
*According to Patch (1918:45) and Maxson (1923:323). Not taken on these hosts in 
this region. 
