390 
15. 
16. 
17: 
18. 
BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Hairs present on thoracic dorsum, longer and more numerous on 
headvand (raster waitin saci). delet BO OAL a Reig 15 
Gaster black 
Body rather opaque; petiole broad, with sharp superior border. 
sanguinea rubicunda Emery. 
Body somewhat shining; petiole narrower, with blunter superior 
botdens; iter. gene sanguinea rubicunda var. lucidula, var. nov. 
Sides of head convex; clypeal notch shallow; hairs moderately 
abundant; tibiae with very fine appressed pubescence. .... . 18 
Sides of head very feebly convex; clypeal notch rather deep; 
hairs more abundant; anterior surfaces of tibiae with small 
oblique hairs and aithotik appressed pubescence. 
sanguinea puberula Emery. 
Head, thorax, and petiole red, gaster dark brown. Clypeal notch 
feeble. butedistinet,. .......00f00% J sanguinea subintegra Emery. 
Head, thorax, and petiole yellow, gaster pale brown. Clypeal 
notch obsolescent. . sanguinea subintegra var. gilvescens, var. nov. 
RuFA GROUP. 
Workers. 
Palaearchie [OEMs .,.. Paepedioney bei anf )cs | cand tb. eR ee 2 
NearCiie forming i sy saie nn etotiste crow k ssreistinhor Ao Stee eee 12 
Frontal area opaque; antennal scapes short and robust; whole 
wpper, suriace.ot dhead <blacks,. csc. avers: uralensis Ruzsky. 
Frontal area shining; antennal scapes longer and more slender; 
infuscation of head, when present, less extensive........... 3 
Gaster brown or black, more or less reddish at the base........ 4 
Gaster entinely; blacks, .cxelbierins sod ios bron. Leek fee i 
Front, vertex, and a small pronotal spot dark Green or blackish; 
erect hairs on head and thorax usually sparse; eyes hairless. .5 
Front, vertex, and pronotum rarely spotted; body and_ legs 
usually, mone hainy: eyes usually hairy....:......0.5. 0008 8 
Head long and narrow, with straight cheeks; thorax slender 
rufa var. santschi, nom. nov. 
Head short, cheeks more convex; thorax robust............. 6. 
Head, thorax, and petiole red. 
rufa Linné and its var. rufopratensts Forel. 
