GENERA OF AFRICAN LYCAEN I OAK 



75 



Male genitalia (Text-fig. 74). Tegumen subtriangular excised caudad ; uncus represented 

 by two lateral strips folded inwards ; no subunci ; vinculum fairly wide, prolonged into a 

 long slender saccus ; lower fultura pedunculate, sheathing the base of the penis ; valves sub- 

 oval, the two processes separate at the apex, the lower process notably longer than the upper ; 

 penis long, slightly curved, ending in a slender point, widely open on its upper surface ; uncus 

 and apices of valves pilose. 



The male genitalia of all the known species of Iridana are so similar that they do 

 not provide useful specific characters. 



The larvae of /. incredibilis and /. marina have been observed by Farquharson 

 (1921, Trans, ent. Soc. Lond. 1921 : 357) and T. H. E. Jackson (1937, Trans, R. ent. 

 Soc. Lond. 86 : 208). The latter suggests that they feed on lichens among ants, 

 though in captivity they were reared in the absence of ants. .They are nocturnal, 

 living and pupating in silken shelter tents in crevices on the bark of trees. They 

 live in the neighbourhood of the nests of ants of the genus Crematogaster which 

 ignore them, yet assure them of a kind of passive protection. They have no dorsal 

 glands. The chrysalis of /. incredibilis has been described and figured by 

 Eltringham (1921, Trans, ent. Soc. Lond. 1921 : 477), that of marina by Jackson 

 {I.e. : 209). 



List of Species of Iridana 



Iridana ansorgei (Smith), see incredibilis. 

 *Iridana bwamba Stempffer, 1964 : 1258, fig. 

 Iridana euprepes (H. H. Druce), 1905. 



* Iridana exquisita (Smith), 1898. Fig. Smith & Kirby, 1901. 



* Iridana gabunica Stempffer, 1964 : 1246, fig. 

 *Iridana ghanana Stempffer, 1964 : 1249, %• 



*Iridana hypocala Eltringham, 1929, Trans, ent. Soc. Lond. 1929 

 Fig. Stempffer, 1964 : 1243. 

 magnifica Hawker Smith, 1933. 



494 (ng. $). 



Fig. 74. Iridana incredibilis (Staudinger), q" genitalia. 



