wheeler: ants of the genus formica. 389 



3. Infuscation of head extending down onto the cheeks, leaxdng only 



the posterior corners red sanguinea fusciceps Emery. 



Infuscation of head less extensive, confined to the front and 

 vertex 4 



4. Epinotum obtusely but distinctly angular, .sanguinea Latreille. 

 Epinotum much rounded sanguinea var. mollcsonae Ruzsky. 



5. Eyes of the usual size and shape, .sanguinea var. darior Ruzsky. 

 Eyes smaller and more elongate, .sanguinea var. flavorubra Forel. 



6. Gaster red or ferruginous like the head and thorax. 



bradleyi, sp. nov. 

 Gaster brown or black, always darker than the head and thorax . 7 



7. Gaster decidedly shining, with very sparse, short pubescence . . 8 

 Gaster opaque or subopaque, with longer, dense pubescence ... 9 



8. Erect hairs on head, thorax, and gaster long and dense. Clypeal 



notch indistinct in small workers. Length of worker 3.5- 



5 mm., of female 7.5-9 mm yerpihsa Wheeler. 



Erect hairs on head, thorax, and gaster shorter and sparser. 

 Clypeal notch distinct in small workers. Length of worker 

 3.5^.5 mm. ; of female 6-7 mm manni, sp. nov. 



9. Head, thorax, and petiole brownish testaceous; cheeks straight 



or slightly concave 10 



Head, thorax, and petiole red or ferruginous; cheeks more or less 

 convex 11 



10. Head long and narrow; antennae slender, scapes not thickened 



tow^ards their tips; body subopaque pergandei Emery. 



Head shorter; antennae more robust; scapes slightly thickened 

 towards their tips; erect hairs less numerous. . emery i, sp. nov. 



11. Hairs on the dorsal parts of the body abundant, conspicuous, 



ghstening white, obtuse or clavate 12 



Hairs less abundant and more slender 13 



12. Head and thorax deep red, petiole infuscated; body slender, 



mesoepinotal constriction shallow, epinotum long and low. 



munda Wheeler. 

 Head, thorax, and petiole yellowish red, body stout, mesoepi- 

 notal constriction deep, epinotum short and high. 



sanguinea obtusopilosa Emery. 



13. Front and vertex more or less infuscated . . sanguinea aserva Forel. 

 Front and vertex not infuscated 14 



14. Hau's nearly always absent on the thoracic dorsum and petiolar 



border, short and few on the head and gaster. 



sanguinea subnuda Emery. 



