On British Oligocene Ants. 81 



EXPLANATION OF THE PLATES. 

 Plate III. 



Pupae of Simulium, 



Fig. 1. Respiratory filaments of the pupa of Simuliinn aureoshnUe, sp. n. 



Fi(j. 2. Respiratory filaments and upper portion of the pupa of Simulium 



unicornutum, sp. u. 



Fig. 3. Siinuliu7n cervicorniitum, sp. n. 



Fig. 4. Simuliion dumnosuni, Theobald. 



Fig. 5. Simulium gihipes, sp. n. 



Fig. 6. Simulium medusaformis, sp. u. 



Plate IV. 



Genitalia of Simulium. 



Fig. 1, Simulium gilvipes, sp. n. 

 Fig. 2. Sijniiliutn medus(eformis, sp. n. 

 Fig. 3. Simulium cervicomutum, sp. n. 

 Fig. 4. Simulium aureosimile, sp. u. 

 Fig. 5. Simulium damnosum, Theobald. 



Y.— British Oligocene Ants. By HORACE St. J. K. 

 DONISTHORPE, F.Z.S., F.E.S. 



[Plate v.] 



In my book on British ants (1915) I pointed out that two 

 wing-impressions from the Lower Purbecks of Durdlestone 

 Buy, considered by Westwood to belong to ants, and described 

 by him in 1854 as Formicium brodiei and Myrmiciuni heeri, 

 had been shown by Handlirsch to belong to saw-flies. I also 

 stated that the remains of three genera — Mgnnica, Formica, 

 and Camponotus — were found in tlie Bembridge Limestone. 

 The latter statement was made on the strength of a short 

 note by P. B. Brodie on Tertiary fossil ants (1875) and a 

 list of genera given in a paper by Dr. Henry Woodward 

 (1879) on the authority of Mr. Frederick Smith of the 

 British Museum. 



At the time I was not aware that there were in the British 

 Museum large collections of insects made by Brodie and 

 E. J. A'Court Smith from the Oligocene of the Isle of Wight. 

 At the request of the officers of the Geological Department I 

 have since overhauled this collection, as well as a number of 

 British fossil insects belonging to Mr. 11. W. Hooloy from 

 the same source, and have arranged the specimens, as far 

 as I am able, into their different families. Of tiic numbers 



Ann. (& Ma<j. N. Hid. Ser. 9. Vol. vi. G 



