244 LEPIDOPTERA HETEROCEKA 
6. M. xanthostephana, nov. sp. 1), Prout. 'Transvaal. 
7. M. viridans, nov. sp. 2), Prout. Mashonaland, Natal. 
198. GENUS EUCROSTES, HÜBNER 
Eucrostes. Hübner, Verz. bek. Schmett. p. 283 (18267). 
Eucrostis. Lederer, Verh. Zool.-bot. Ver. Wien, Vol. 3, p. 172 (1853). 
Euchrostes. Gumppenberg, Nova Acta Acad. Leop. d. Naturf. Halle, Vol. 64, p. 483 (1895). 
Characters. — Face smooth. Palpus moderate, second joint somewhat rough-scaled, third 
joint in c* short. in Q moderate to long. Tongue developed, though rather slender. Antenna short, in 
both sexes bipectinate to about two-thirds. in c with long, in Q with short branches, apex merely 
serrate; in Q sometimes subserrate throughout. Pectus slightly hairy. Femora glabrous. Hindtibia in 
both sexes with terminal spurs on y. Abdomen not crested. Forewing rather broad 3), costa little arched, 
apex moderate, termen smooth, slightly curved, cell nearly one-half, DC incurved, SC! from cell, 
anastomosing with, or oftener running into C, SC? normal, well separate from C, R! connate or approx- 
imated, R? from above middle, M! connate or short-stalked; hindwing with apex somewhat rounded, 
termen strongly rounded, inner margin rather long, cell rather short, DC? somewhat incurved, C anast- 
omosing with cell at a point near base, then rapidly diverging, SC* stalked or connate, R^ very 
characteristic, M! stalked, M? from near end of cell. cf genitalia : uncus pointed. with socii of equal 
length, gnathos strong, pointed, harpe rounded, with small serrated fold on the sacculus, penis pestillate. 
Somewhat resembling those of the Hemithea-group, but this hardly indicates a really near relationship. 
Ecc. — Flattened, canary vellow — scarcely described. 
LaRva. — Moderately long, somewhat attenuated anteriorly, segmentation distinct. Head rather 
small, slightly bilobed, the lobes rounded, prothorax and metathorax strongly keeled, prothorax with 
four small dorsal protuberances, first to fifth abdominal segments and eighth abdominal each with a 
single pyramidal one, spiracles small, rounded (Milliére, Ann. Soc. Linn. Lyon (n. s.), Vol. 15, p. 208, 
1:592 St 9 NIE StotL-  VIOTSES NDEESO 
PupA. — Rather obtuse, smooth, green, in slight web among the foodplant, EuAorbia (Milliere, 
loc 61t)- 
1) Mixocera (Thel!ycera) xanthostephana, nov. Sp. — 7, ^o mm. Fnce and. palpus red, the latter shorter than diameter of 
eye. Antenna ochreous, spotted with red above. Head bright yellow ochre, marked with red behind eye and below. Thorax above green, narrowly 
ochreous in front. Legs mostly reddish, hind- and part of mid-femur pale. Abdomen whitish. Forewing with costa slightly arched, termen slightly 
more oblique than in most of the species; delicate blue-green, costa narrowly pale ochreous, an oblique ochreous-whitish line from inner margin at 
beyond two-thirds, running towards apex, terminating at R! (in the type) or at SC! (co-type); fringe green proximally, white distally. Hindwing white, 
terminal one-fourth shaded with pale green; fringe pale green proximally, white distally. Underside of forewing slightly paler, the whitish line present; 
of hindwing more uniformly greenish-tinged. Barberton, l'ransvaal, 19 December, 1910 (type) and 31 December, 19ro (co-type), collected by Mr. A. JT. Janse, 
the former in his collection, the latter in coll. L. B. Prout, kindly presented by the captor. Distinguished from the preceding species, apart from larger 
size and brighter coloration, by the more oblique course of the postmedian line, which, moreover, is more slender. A G from Mulema, Uganda, 
May, 1903 (W. L. Doggett). in coll. Brit. Mus., appears to be referable to xaz£Aostegzana, though faded, and has the line still more slender. We have 
seen other specimens from scattered localities, in more or less imperfect condition, which certainly belong to this section, but it would he premature to 
decide whether we have to deal with a number of very close allies or one or two variable species. In any case the details of venation will not assist 
determination, for in the type of xantAtostepAaza SC! of forewing anastomoses with C and M* is connate with R3, while in.the co-type SC! is free and M! just 
separate, and we have observed similar variations in other pairs of examples which are equally certainly conspecific. The Uganda cf agrees in venation 
with the co-type. 
2) Mixocera (Thelycera) viridans, nov. sp. — & 9,2021 mm. Face and palpus deep red, palpus in c shorter than, in Q about 
as long as diameter of eye. Head and front of thorax ochreous. Thorax and abdomen yreen above, the latter paling off to whitish anally. Fore-and 
middle-legs red, on outer side whitish; hindleg mostly whitish, the femur marked with red, the spurs ferruginous; aslight pencil and process; tarsus 
short. Forewing strongly blue-green, with costa (to SC) pale ochreous; a moderately broad, slightly oblique pale ochreous line from beneath costa 
near apex to inner margin at about three-fourths. Hindwing concolorous, with a similar line, which runs almost straight from costa near apex to 
inner margin at about three-fourths, becoming somewhat more attenuated towards the latter. Underside tle same, only slightly paler, costal area of 
forewing more mixed with green. Enkeldoorn District, Mashonaland (Miss E. S. Youngs) type OG; Salisbury, Mashonaland, 27 November, 1897 
(G. A. K. Marshall), discoloured c ; Natal,a Q presented by Dr. A. J. Turner; all in coll. Brit. Mus. Durban, Natal (E. A. Bacot), a 9 in coll. L. B. Prout. 
The type specimen has unfortunately lost both antennz, but the Salisbury G and the two 29 show the structure of the subgenus 74Ae/ycera. In all 
four examples SC! and R! of the forewing arise close together either from the angle of the cell or the base of the stalk of SC?5; D? varies slightly 
in obliqueness, and M! from connate to very shortly stalked. The concolorous hindwing separates this species readily from the two preceding. 
3) Shape of both wings quite different in sz»onyr and xzfociliaria, being narrow, hindwing not concolorous with forewing. These will perhaps 
form distinct genera, 
