514 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
It attends aphids on the oaks. Mayr has also noticed the association 
of gagates with these trees, a relation similar to that obtaining between 
the oaks and the species of Liometopum and the varieties and sub- 
species of Camponotus fallax in both hemispheres. 
95. F. GAGATES var. FUSCO-GAGATES Forel. 
?F. gagates var. morio Latreille, Essai hist. fourmis France, 1798, p. 36,518 
Hist. nat. fourmis, 1802, p. 140. 
F. fusco-gagates Forel, Denks. Schweiz. gesell. naturw., 1874, 26, p. 54, Ot 
F. gagates var. fusco-gagates Dalla Torre, Catalog. Hymen., 1893, A; D:, 199. 
F. fusca gagates var. fusco-gagates Forel, Ann. Mus. St. Petersbourg, 1904, 8, 
p. 384; Emery, Deutsch. ent. zeitschr., 1909, p. 195, 8. 
WoRKER. 
Intermediate between fusca and gagates, but smaller, the structure 
of the epinotum subangular in profile and therefore more as in fusca. 
Head, thorax, and frontal area more opaque than in gagates. 
Italian Switzerland. 
Emery believes that this form may be a hybrid. 
96. F. RUFIBARBIS Fabricius. 
F. rufa Fourcrois, Ent. Paris, 1758, 2, p. 452 (nec. Linné). 
F. pratensis Olivier, Encycl. meth. insect., 1791, 6 (nec. Retzius). 
F. rufibarbis Fabricius, Ent. syst., 1793, 2, p. 355, 8; Syst. Piez., 1804, 
p. 402; Jurine, Nouv. meth. class. Hymén., 1807, p. 273, 8 9 &@; Ern. 
André, Rev. mag. zool., 1874, ser. 3, 2, p. 185; Spec. Hymén. Europ., 
1822, 2, p. 182, 186, 189, pl. 2, fig. 7,8 9 &; Mayr, Fedtschenko’s 
Turkestan. Formicid., 1877, p. 7; Lubbock, Ants, bees, wasps, ed. 5, 1882, 
p. 80; Forel, Bull. Soc. Vaud. sci. nat., 1884, ser. 2, 20, p. 379; Dalla 
Torre, Catalog. Hymen., 1893, 7, p.209; Ruzsky, Formicar. Imper. Ross., 
1905, pr 885770 NG Vor. 
F. cunicularia Latreille, Essai hist. fourmis France, 1798, p. 38, 8 2 oF; 
p. 40, 8 9 &; Brullé, Exped. sci. Morée zool., 1832, 2, p. 326; Lepele- 
tier, Hist. nat. insect. Hymén., 1836, 1, p. 203; Nylander, Acta Soc. 
Fennica, 1846, 2, p. 913, 1059, pl. 18, fig. 17-19, 8 9 o; Forster, Hymen. 
stud., 1850, 1, p. 25, 8 9 o&; F. Smith, Trans. Ent. soc. Lond., 1855, 
ser. 2, 3, p. 103, pl. 9, fig. 14, 8 @ o; Mayr, Verh. Zool. bot. ver. Wien, 
1855, 5, p. 342, 8 @ o; Europ. Formicid., 1861, p. 47. 
F. fusca st. rufibarbis Forel, Denks. Schweiz. gesell. naturw., 1874, 26, p. 53, 
88d. 
F. fusca subsp. rufibarbis Emery, Deutsch. ent. zeitschr., 1909, p. 197; 
Karawajew, Rev. Russ. ent., 1909, p. 269. 
