British Oligocene Ants. 93 



Tribe Camponotini, Forel. 



Genus Camponotus, Mayr. 



Subgenus Colobopsis, Mayr. 



Camponotus (Colobopsis) brodiei, sp. n. 



One specimen appears to me to be a soldier of Colobopsis, 

 on account o£ the square anterior truncation of its head. The 

 head, thorax, scale, and gaster, three legs, and a part of one 

 antenna are present. 



Length 4*5 mm. ; head, long 1*7 mm. ; breadth in middle 

 of head I'd mm., at apex '1 mm. 



Oligocene at Gurnet Bay {Brodie). 



llolotype, (D. 2), I. 9551, on same block as an Oecopliylla ; 

 in Brit. Mus. (PI. V. fig. 13). 



Wheeler (1914) described a new genus Dryomyrmex, with 

 two specie?, from the Baltic amber. At first he regarded 

 them as belonging to the subgenus Colobopsis of Camponotus, 

 but he found that the different structure of the antennae and 

 frontal carinas placed them near Aphomyrmex. Such cha- 

 racters as these are unfortunately not visible in specimens 

 imbedded in rock. He points out that the structure of the 

 head etc. shows that the ants lived in cavities of twigs, in 

 oak-galls, or in abandoned insect-galleries in solid wood, like 

 the species of Colobopsis. 



WOKKS REFERRED TO. 



Adolph, E. 1880. " Ueber das Flugelgeader des Lasius umbratus, 



Nyl." Verh. Ver. Rheinl., xxxvii. pp. 35-53. 

 Brodie, P. B. 1895, " Tertiary Fossil Ants in the Isle of Wight." 



' Nature,' lii. p. 570. 

 Cockerell, T. D. A. 1915. " British Fossil Insects." Proc. U.S. 



Nat. Mus., xlix. pp. 469-499. 

 Donisthobpe, H. St. J. K. 1915. ' British Ants, their Life-history 



and Classification.' Plymouth : Brenden & Son, Ltd. 

 Emery, 0. 1891. " Le Formiche dell' ambra siciliana nel museo 



mineralogico dell' Universita diBologna." Mem. Ace. Sc. Bologna, 



v. pp. 141-165. 

 Heer, O. 1850. " Die Insektenfauna der TertiiLrgebilde von Oeningen 



und von Radoboj in Croatien." Denkschr. Schweiz. Ges. Naturw , 



xi. pp. 1-264. 

 Westwoop, J. O. 1854. "Contributions to Fossil Entomology." 



Quart. Jo urn. Geol. Soc. Lond., x. pp. 378-396. 

 Wheeler, W. M. 1914. " The Ants of the Baltic Amber." Schrift. 



Physik-okonom. Gesell. Konigsberg, lxv. pp. 1-142. 

 Woodward, H. 1879. " On the Occurrence of Branchipus (or Chiro- 



cephalus) in a Fossil State, associated with Eosphteroma and with 



numerous Insect Remains, in the Eocene Freshwater (Bembridge) 



Limestone of Gurnet Bay, Isle of Wight." Quart. Journ. Geol. 



Soc. Lond., xxxv. pp. 342-350. 



