138 D. S. FLETCHER 



a thorn-like projection; base of projection on right valve extended basad along middle of valve 

 in form of slender, sclerotized ridge; dorsal process setose in basal third, but without projection. 

 $ genitalia (PL 47, fig. 639; PI. 48, figs 642, 643). Lamella antevaginalis sclerotized as 

 illustrated; lateral margins variable, rounded in holotype (PI. 48, fig. 642), tapered in other 

 examples (PI. 48, fig. 643) ; a topotypical paratype is intermediate in form between the two 

 examples illustrated. Posterior fourth of corpus bursae weakly ribbed and minutely scobinate. 



Measurements. Fore wing: <$ $ 12 -5-1 4-0 mm. Antennal pectinations: £ 8 X, $ 2 x 

 diameter of shaft. 



Most examples may be distinguished externally from related species in the 

 bathyscaphes-group by the more dentate penetration of hyaline into the non- 

 hyaline terminal area of each wing and especially by the tapered extension to the 

 termen along vein Cu u . The female may be distinguished from closely related 

 adiposata by the shorter antennal pectinations, those of bathyscaphes being twice 

 as long as the diameter of the shaft, those of adiposata being six times as long as 

 the diameter of the shaft. 



Externally similar also to iobathra and calypso in the iobathr a-group, but the dis- 

 tribution of bathyscaphes does not appear to overlap that of either of those two 

 species. 



In the male genitalia the form of the asymmetrical valves and in the female 

 genitalia the form of the sterigma are diagnostic. 



Distribution. Tanzania, Burundi, Zaire, Zambia, Malawi, Mozambique, Rhodesia. 



Material examined. 



Zamarada bathyscaphes Prout, holotj^pe $, Rhodesia: Selukwe, x. 1911 (F. W. 

 Short), Geometridae genitalia slide no. 6007, in BMNH. Zamarada perplexa Janse, 

 holotype <$, Rhodesia: Umvuma, io.i.1918 (Carnegie), ex coll. A. J. T. Janse, 

 genitalia slide no. G2710, type no. 2224, in TM, Pretoria. 



Tanzania: Dodoma, iii. 1950 (N. Mitton), 1 <£; Morogoro, Ilonga i-iii. 1965 

 (Mrs Chalmers), 1 $ (both NMK, Nairobi). Burundi: Upper Ruvuvu River, 

 vii-viii. 1919 (T. A. Bams), 1 $ (BMNH). Zaire ('Belgian Congo'): Elisabethville, 

 i,viii,ix,xii (C. Seydel), 3 <$, 3 $ (all MRAC, Tervuren); Ht. Katanga, Sakania, 

 30.1.1932 (/. Romieux), 1 $ (MHN, Geneva). Zambia: Abercorn, i. 1964, 1 $ (NMR, 

 Bulawayo); Broken Hill, 24.il. 1950 (N. Mitton), 1 $ (TM, Pretoria); Lusaka, i,v 

 (R. C. Dening), 1 <$, 1 $ (BMNH); ibidem, 18.ii.1962, 1 <£ (NMR, Bulawayo). 

 Malawi: Karonga, 1 $ (CM, Pittsburgh); Kasangazi, near Bandawe, 3000 ft above 

 L. Nyasa (Dr Prentice), 1 <$; Zomba (H. N. Stannus), 1 <$; Blantyre, 18.V.1910 

 (J. E. S. Old), 1 $; Mt Mlanje, 28.ii.1913 (S. A. Neave), 1 ?; ibidem, 15.iv.1913, 

 1 $ (all BMNH). Mozambique: Ruo Valley, i.iv.1913 (5. A. Neave), 1 <J (BMNH); 

 Zambezia Prov., 16 miles N.E. of Molumbo, 30.iv.1970 (E. Pinhey), 1 <$; 16 miles S. 

 of Vila Junqueiro, i.v.1970 (E. Pinhey), 1 J (both NMR, Bulawayo). Rhodesia: 

 Salisbury, 1 $ (ZSBS, Munich); ibidem, ii,v, 2 $ (NMR, Bulawayo); Marandellas, 

 i,x,xii, 3 (J, 1 $ (NMR, Bulawayo); Selukwe, i-iii, viii,x,xii (F. W. Short), 7 g, 3 $; 

 Umtali, viii. 1966 (A. Richardson), 1 g (all BMNH); Turk Mine, ix. i960, 2 6*J 

 Khami, xii. i960, 1 $ (all NMR, Bulawayo); Fort Victoria, 30.viii.1966, 1 J; Lundi, 

 2-16.iii.1964 (Vdri & van Son), 9 g, 2 $ (all TM, Pretoria). 



