54 APHIDS OF THE ROCKY MOUNTAIN REGION 
rather stout, terminal segment very short. Fore wing with stigma short and broad, radial 
sector rather conspicuous; media twice-forked, fine but not faint. 
Apterous Summer Vivipara. (Cleared and mounted), head, prothorax, mesothorax, corn- 
icle, cauda, anal plate, spiracles and dorsal glandular specks black; antenna and femora 
brown; tibiae brown proximally, becoming black distally; tarsi black. Body length 4.2; 
across eyes .80-.85; hind tibia 3.7-4.0; rostrum attaining abdomen. Hairs pointed to blunt, .05 
long on body. Pair of sternal tubercles developed. 
0 Sen. 6-14 (ih. ere 
PS ee ee ee | eee AW) as 
dee 83 
[apt Viv eo 6-14 
Hind tibia 
in REL 
POG ee 
Phot Viv. 
SE ar g . 
ier Mine 
Apt. te Tu bercles 
Fig. 51. Lachnus roboris 
Hosts. On Quercus sp. (Not recorded from region.) 
Data for description and figures were taken from Theobald (op. cit.) and 
from specimens determined by Cholodkovsky and Hille Ris Lambers. 
Lachnus rosae Cholodkovsky 
The Hairy Rose Aphid 
mY) oh 50 +.62 AS-25 .290-28 IO-- OF ag 2 &§ 
a a Pe 2S 
OT nS SORTS Dee 
Apt: Vis Sen5-10 ea) 20-2 
Hind SS 
Sen. 5-10 T- 
oi(apterous) 
Fig. 52. Lachnus rosae 
Lachnus rosae Cholodkovsky, 1899:471; Gillette and Palmer, 1931:877. 
Pterochlorus rosae, Knowlton, 1929c:33. 
Apterous Summer Vivipara. Yellowish or rusty-brown to blackish; legs dusky through- 
out. Body 2.7-3.5; hind tibia 1.50-2; antenna 1.3-1.6. Hairs fine; on hind tibia length about 
half of diameter of tibia, same on antenna; on body .07-.08. Rostrum attaining 3d coxa. 
Alate Vivipara. Same as aptera except as follows: Wings slightly smoky with darker 
area between stigma and media. 
Ovipara. Apterous. Same in color and measurements as vivipara or darker. 
Male. Apterous. Color same as in apterous vivipara. Body length 1.6; hind tibia 1.1; 
antenna 1. 
Collections. On Rosa fendleri and other wild species, on bark of stems, near 
ground; in colonies. Colorado: Foothills near Fort Collins, Bellvue and Log 
Cabin (northwest of Livermore). Utah: Logan and Plain City. Idaho: Twin 
Falls. Apterous summer viviparae May 24 to Oct. 25, alate viviparae June 9, 
sexuales Oct. 15 to 25; usually not common; but extremely abundant in Utah 
in 1928. 
