94 P. E. S. WHALLEY 



Rhodesia: 2 <$, Umvuma, xii.1917 (Janse), in NMR; 1 g, Wankie, viii.1925 (Tyler) ; 

 1 cJ, Hunters Road, xii.1917 (Whatky), in NMR; 1 <$, 1 $, Bulawayo, xii.1924 

 (Stevenson), in NMR; 1 $, Wankie, xii.1961, in NMR; Angola: 1 <J, 1 $, Bihe, 

 Andulo (Brauri), xii.1934; 1 $, xii.1904 (Ansorge); South Africa: 7 <$, 2 $, Punda 

 Milia, KNP survey, 1-5. xii. 1964 (Fan 6- Potgieter), five (J, two $ in TMP. 



Subgenus ISOTHAUMA Warren 



Isothauma Warren, 1899a : 6. Type-species, /. opalinula Mabille, by monotypy. 

 Rhodoneura (Isothauma) Warren; Whalley, 1967 : 25. 



This subgenus contains similarly patterned species in Madagascar and one wide- 

 spread African species. The African species (serraticornis) presents many problems 

 in its morphology and distribution in Africa. There appear to be no constant 

 morphological differences between serraticornis from widely separated localities in 

 spite of differences in wing pattern. The species is very variable in pattern and 

 colour but the most remarkable feature is a difference between the length of antennal 

 pectinations of some male specimens. I have not found a comparable difference in 

 the females and, since I have specimens with the same collection data but with 

 different lengths for the antennal pectinations, I am retaining this variable group 

 as one species. 



Subgeneric description. Fore wing usually with some radial veins joined. Bursa with 

 prominent, usually stellate, signum. 



Biology. No information. 



Rhodoneura (Isothauma) serraticornis Warren 



(PL 2, E, F; PI. 9, figs 37, 38; PL 25, figs 131-133; PL 34- figs 186-188; 



PL 56, figs 334-338) 



Rhodoneura serraticornis Warren, 1899b : 288. 



Iridesmodes [sic] cymoeasticha Bethune-Baker, 1911 : 541, synn. 



Iridesmodes [sic] phricosticha Bethune-Baker, 191 1 : 541, syn n. 



Iridesmoides [sic] cymoeasticha Bethune-Baker; Dalle Torre, 1914 : 46. 



Iridesmoides [sic] phricosticha Bethune-Baker; Dalle Torre, 1914 : 46. 



Isothauma serraticornis Warren; Dalle Torre, 1914 : 37. 



Rhodoneura phoenicophora Hampson, 1914 : 116, syn. n. 



Rhodoneura phoenicophor a Hampson; Gaede, 1917 : 360. 



Tridesmodes cymoeasticha Bethune-Baker; Gaede, 1917 : 373. 



Tridesmodes phricosticha Bethune-Baker; Gaede, 191 7 : 373. 



Isothauma serraticornis Warren; Gaede, 191 7 : 368. 



Rhodoneura nudicornis Gaede, 1917 : 375, syn. n. 



Tridesmodes cymaeosticha [sic] Bethune-Baker; Gaede, 1929 : 497. 



Tridesmodes phricosticha Bethune-Baker; Gaede, 1929 : 497. 



Rhodoneura nudicornis Gaede; Gaede, 1929 : 494. 



Rhodoneura phoenicophora Hampson; Gaede, 1929 : 493. 



Oxycophina serraticornis Warren; Gaede, 1929 : 495. 



Rhodoneura (Isothauma) serraticornis Warren; Whalley, 1967 : 19. 



J. Wing, 11 -5-1 6-5 mm. Vertex brown, irrorate with white. Antennae bipectinate or 

 simple (see below). Labial palps with third segment 1/3 length of second, upturned, reaching 



