138 



H. STEMPFFER 



distal edge ; valves oval, very small in comparison with the dorsal structures ; penis large, 

 very robust ; vesica enclosing two large cunei ; uncus, and the apices of the lower fultura and 

 of the valvae, pilose. 



Aphniolaus pallene is very easily recognized by the pale sulphur-yellow colour of 

 its wings, a colour not found in any other species of Iolans. 



List of Species of Iolaus (Aphniolaus) 

 *Iolaus (Aphniolaus) pallene (Wallengren), 1857. Fig- Hewitson, 1878. 



IOLA US (IOLA US) Hiibner 



Iolaus Hiibner, 1823, Verz. bek. Schmett. : 81. Type-species : Papilio eurisus Cramer, desig- 

 nated by Hewitson, 1863, 77/. diurn. Lep. Lycaenidae, 1 : 40. 

 Iolaus Hiibner (partim) ; Aurivillius, 1898 : 325 ; 1924 : 403. 



Eyes smooth ; palpi long, slightly ascending, parallel, second segment long, slender, extending 

 beyond the frons, third segment more slender, acuminate ; antennae about half the length of 

 the costa, slender, with a poorly differentiated club ; thorax fairly robust, clothed below with 

 silky hairs ; fore leg of the o* with tibia shorter than the femur and the tarsus unsegmented, 

 finely spinose below, tibiae of mid and hind legs shorter than the femora, metatarsi long. 



Wing shape. Fore wing in q" with inner margin slightly lobed basally ; hind wing, both sexes, 

 outer margin angled at the end of vein 4, three delicate tails increasing in length at the ends of 

 veins 3, 2 and ib ; a lobe at the anal angle. Male secondary sexual characters : on the under- 

 side of the fore wing a shining, scaly patch below the lower edge of the cell ; in the middle of 

 the inner margin a tuft of long, adpressed black hairs ; on the upperside of the hind wing a 

 large black scaly area below the base of vein 8 and covering the upper half of the cell. 



Wing venation (Text-fig. 296). Fore wing with 11 veins in both sexes ; hind wing, cell short, 

 truncated. 



Fig. 124. Iolaus {Iolaus) eurisus (Cramer), $ genitalia. 



