OBSERVATIONS ON GIGANTIOPS DESTRUCTOR. 199 



may be due to the fact that ants endowed with unusual visual 

 powers can retain such a habit with some impunity. Santschi 

 ('n) and Brim ('14) have shown that vision is an essential factor 

 in the homing behavior of ants that do not adhere very strictly to 

 the topochemical trail made by themselves or their fellows from 

 and to the nest. The leaping habit, if preserved and assiduously 

 practiced in small-eyed ants, would, of course, often render it 

 difficult or impossible to find the nest by means of the antennal 

 sense alone. 1 



LITERATURE. 



Ashmead, W. H. 



'05 A Skeleton of a New Arrangement of the Families, Subfamilies, Tribes 

 and Genera of the Ants, or the Subfamily Formicoidea. Canad. Ent., 

 1905, PP- 381-384. 

 Berlese, A. 



'20 Gli Insetti, Vol. 2. Milan, So<c. Edit. Libraria. 1920. 

 Bingham, C. F. 



'03 Ants and Cuckoo Wasps. Hymenoptera, Vol. 2. In Blanford's Fauna 

 of British India, including Ceylon and Burma. London, Taylor and 

 Francis, 1903. 

 Biro, L. 



'gya Pattago hangyak (Jumping Ants). Rovart. Lapok., 4, 1897, pp. 73, 74. 

 *97b Biologische Mittheilungen aus New Guinea. Ill Springende Ameisen. 



Berliner Ent. Zeitschr., 42, 1897, pp. 136, 137. 

 Borgmeier, T. 



'20 Zur Lebensweise von Odontomachus affinis Guerin. Ihering-Festschrift. 



Zeitschr. Ver. Wiss. Kunst., 1920, pp. 3138. 

 Brun, R. 



'14 Die Raumorientierung der Ameisen und das Orientierungsproblem im 



allgemeinen. Jena, Gustav Fischer, 1914, viii + 284 pp., 51 figs. 

 Cockerell, T. D. A. 



'15 British Fossil Insects. Proc. U. S. Nat. Mus., 49, 1915, pp. 469-499, 



6 pis. 

 '20 Fossil Arthopods in the British Museum, I. Ann. Mag. Nat. Hist. (9). 



5, 1920, pp. 273-279, 3 figs. 

 '21 Some Eocene Insects from Colorado and Wyoming. Proc. U. S. Nat. 



Mus., 59, 1921, pp. 29-39, i pi., 9 text-figs. 

 Donisthorpe, H. S. J. K. 



'20 British Oligocene Ants. Ann. Mag. Nat. Hist. (9), 6, 1920, pp. 81-94, 



! P l. 



i The mollusks of the genus Pecten are interesting in this connection, 

 since, as is well known, they are able to leap considerable distances through 

 the water by rapidly opening and closing the valves of the shell and have their 

 mantle margins beset with large, highly specialized eyes. 



