OMFHALUCHA. By L. B. PiioirT. 
147 
is from the Orange Free State and Natal to S. Rhodesia, hut the British Museum has it also from s(jme hjcalities 
in eastern Cape Colony. The larva, according to Mr. E. E. Platt of Durban, feeds on Rhus villosa and Com- 
breknn gueinzii. — ab. loc. {1 subsp.) clarescens form. nov. All the 5 examjjles which 1 have seen from Kenya <-l<irr.scr,,.-<. 
Colony are of a form which appears only very rarely in Soidh Africa, in the $ loi'ining a remarkable C(jlour- 
contrast to tyincal crenulata; median area of forewing whitish, or in one example yellowish, the ])roximal and 
distal areas predominantly red-brovTi, the subterminal in places strong and white. Kibwezi (W. Feather). 
4 in the Tring Museum, including the ty]je; Voi Plantations (G. MoNTAfUJE Smytji) a large $ in the British 
Museum; of the form unknown. 
0. angulilinea {Warr.M.. S.) Janse is unknown to me except from the (udginal figure ami descriptioii, 
but is evidently an Omjrhalucha; as, however, Janse, a careful observer, descrilted it as a Boarmia, I su])pose 
its tongue to be somewhat less reduced than in cremdata, though the possibility is not excluded that WArken's 
evidently erroneous reference to A Him. (12-veined) misled and that it was transferred to Brannia, Tr. (11- 
veined), without special examination of the head, as being the most extensive genus in the Aids group whereto 
its venation might refer it. If the stnicture agrees, I can point out no distinction from cremdata exce])t the 
pale (little-irrorated) white-yellow median area, which would approximate it to cremdata f. clarescens. 1 $. rather 
worn, from MTongosi (Zululand), expanding 42 mm. 
0. epixyna sp. n. Expanse 33 mm. Face with a projecting tuft between the antennae. Outer series of epUnjun. 
pectinations considerably longer than inner. Forewing with termen strongly ol)lic[ue, hindwing rather short 
costally. Forewing with the antemedian as oblique posteriorly as in cremdata. (15 f) but not incurved to costa; 
cell-mark long; postmedian moderately curved; subterminal distinct, interrupted by a buff-tinged spot from 
2th subcostal to behind 1st radial and a double dark longitudinal streak at 2nd radial. Hindwing anteriorly 
whitish, though not quite so sharply and extendedly as in cdbosiejncda. FTfiome Mountain, 50 miles 8. of Lake 
Manyara_, 4500 feet, open forest, mostly thorn, March 1921 (T. A. Barns), 1 A British Museiim. 
0. albosignata Janse is also very similar to cremdata (15 f) but is easily distinguished by its hindwing, atboshjit'jld. 
which has the anterior part (about to the radial fold) almost pure white. Expanse 30—38 mm. The forewing 
seems to be slightly more rounded at the apex and to lack the warmer tones which are often conspicuous in 
cremdata. The genitalia show considerable differences. Transvaal: Naboomspruit, type and another ; also 
a from Emangeni, 8. Rhodesia. 
0. exocholoxa sp. n. (15 g) can well be placed betAveen alhosd/nata and indejJe.va; forewing shaped as in c.cochoto.ni. 
the latter, hindwing with the anterior part almost as ];ure white as in the former, only with the fine median 
line continued to the costa. Antemedian strongly oblique, from an angular costal spot, median of both wings 
fine, crossing the cell-dot, on the forewing also with a loop outside it, jjostmedian with one small outward curve. 
Underside whitish, with most of the markings reproduced. Antenna ])ectinate to about the 4()th joint, about 
5 apical joints non-pectinate. Tsumebi, 8. W. Africa. 1 in the British Museum. 
0. indeflexa Froid (15 g). Here, again, the A genitalia show that we are dealing with a separate species, indcfle.ru. 
of which hitherto we known only the type and a $ associated with it by Janse, lioth collected at Pretoria 
in March. Our figure, of the type makes the wings scarcely broad enough and slightly exaggerates the whiteness 
of the subapical s])ot, but otherwise gives a fairly accurate representation. Apart from the shape and coloration, 
the much more direct ])ostmedian distinguishes it readily from cremdata. The $ figured by J.xnse looks to me 
(except in its anteriorly more oblique anteinedian line) much like rufinubes. 
0. ditriba sp. n. (17 b). Palpus short, in the slightly shorter than in cremdata. Forewing with apex difriba. 
slightly more rounded, termen regularly curved; irroration and dark clouding strong but (especially in distal 
area) irregular; antemedian line shaped as in crenulata; cell-mark fairly strong, black; median shade always 
present, sometimes rather strong, about the cell-spot a])pearing dord)le, its proximal part the more direct, its 
distal (and perhaps stronger) part making a loop round the outside of the cell-spot; postmedian more sinuous 
than in indeflexa, less so than in creymdata.; subterminal incomplete, but forming, in addition to the common 
subapical spot, a second and whiter one (sometimes large and somewhat quadrate, about as in rufinubes) betAveen 
the 3rd radial and 2nd median. HindAving generally lighter in proximal area, just outside the ]iosterior ])art 
of the postmedian line and at times in a subterminal patch between 3rd radial and 2nd median; median shade 
fairly strong, proximal to the cell-spot, at hindmargin quite near the postmedian; jAostmedian A^ery gently 
curved or sinuous (noAvhere angulated), someAvhat crenAdate, running near the cell-spot. 8. Rhodesia: Bula- 
Avayo, 22 November to 30 December (R. 8tevenson) ; type and 2 o$; Wankie (C. W. Taylor). 1 $. 
— zoutpanensis form, nov., from Zoutpan, Transvaal, December and February (G. al 8on). is a someAAhat more -outpuncu- 
variegated form, Avith the cell-spots and black lines strong. 2 fyP® S ffi® TransAaal Museum. 
There is a rather broad-Avinged $ from Kurino, E. TransAmul. in the British MAiseum, — As the J type of in- 
