FORMICIDJE. 



Genus JENICTUS 



yEnictus, Shuck. Ann. N. H. v (1840), p. 266, rf . 

 Typhlatta, Smith, Join: Linn. Soc. ii (1858), p. 79, . 



Type, JE". amlifjuus, Shuck., N.W.P. India. 



Range. Africa, Asia, Australia. 



The 3 of this genus very much resembles the tf of Dorylus, 

 but it is always smaller, and the one-jointed pedicel is never very 

 convex, generally concave or flat above. Head small, transverse, 

 flat ; eyes and ocelli very large and prominent ; mandibles some- 

 times long, sickle-shaped and cylindrical, sometimes broad and 

 flat; scape of the antennae, femora, and tibiae of the legs sometimes 

 cylindrical, sometimes flat and even, greatly widened and foliaceous; 

 pedicel one-jointed, carinate beneath. Wings hyaline and generally 

 more or less iridescent, nervures and stigma fulvous yellow to 

 dark brown. Abdomen long, cylindrical, generally slightly clavate 

 and curved downwards. 



$ . Blind, destitute of eyes or ocelli ; antennae 10-jointed. 

 Thorax with the pro-mesonotal suture obsolete : the meso-meta- 

 notal suture distinct, the thorax above at this point being often 

 widely emarginate. Pedicel two-jointed, as in the subfamily 

 Myrvnidnce. The $ , so far as is known, is never dimorphous or 

 polymorphous, as in the genus Eriton, which replaces jEnictm in 

 the New World. $ unknown. 



The workers of JEnictus hunt in columns of three or four 

 abreast, marching with great regularity. Mr. Wroughton (Jour. 

 Bomb. N. H. Soc. vii (1892), pp. 177, 178) has given an inter- 

 esting account of their habits. 



Like the 3 of Dorylus, the 3 of this genus is greatly attracted 

 by light, and is frequently taken in houses in the evening. The 

 d and $ of only one species (jE. wrouylitoni, Forel) have been 

 taken associated together. 



Key to the Species. 



rf rf- 



A. Scape of the antennae cylindrical. 



a. Mandibles with a tooth on inner side close 



to the base JE. anja, p. 8. 



b. Mandibles not toothed. 



a'. Posterior border of hypopyginm medially 



emarginate ". jE. yleadoici, p. 8. 



b' . Posterior border of hypopygium entire. 

 2 . Pygidium round, convex, without any 



longitudinal impression j. wexttcoodi, p. 10. 



6 2 . Pygidium with a longitudinal im- 

 pression. 

 a 3 . Pedicel above concave, the sides 



sharply raised, not broadly rounded. &. ambiguus, p. 9. 

 b x . Pedicel above with a rather narrow 

 longitudinal groove, the sides 

 broadly rounded above JE". pnbescens, p. 10. 



B. Scape of the antennae more or less com- 



pressed, flat. 

 a. Of large size. Length 12-13 mm ^E 1 . yrandis, p. 11. 



