FAM. GEOMETRID/E 27 
Characters. — Face moderately protuberant. Palpus moderate, stout, second joint densely 
rough scaled, third joint in cf quite short, blunt (Q unknown). Tongue developed. Antenna in gf 
simple. Pectus and femora densely hairy. Hindtibia in gf somewhat dilated, 
with tuft of hairs and with a well-developed terminal process (Fig. 4), all FiG. 4 
spurs present. Abdominal crests exceedingly slight, often wanting. Frenulum 
fully developed. Forewing with costa arched, apex acute, termen subcrenu- 
late, cell nearly one-half, DC incurved, SC! from cell, anastomosing at a 
point or connected with C, SC? from stalk of SC?*, occasionally from near 
its base, anastomosing at a point with SC!, R! connate or approximated, 
R? scarcely above middle of discocellulars, M! well separate from R*; 
hindwing with costa short. apex rounded, termen strongly crenate. slightly 
produced to M!, inner margin long, cell rather short, DC* deeply incurved, 
C approximated to cell for some distance, sharply diverging before one-half, 
SC? separate, M! separate. 
Early stages unknown. Hindleg of Z/erocAroma baba, 
Swinboe, g. 
Probably an almost direct derivative of Avckaeobalbis wiridaria, its . 
hindwing similar in shape, but somewhat exaggerated (narrower, more produced to M!) and with 
the hindubial process more strongly developed. 
Type of the genus : Herochroma baba, Swinhoe (1893). 
Geographical distribution of species. — ^ssam. 
I. H. baba. Swinhoe. Khásis. 
Herochroma baba, Swinhoe, Ann. Mag. Nat. Hist. (6), Vol. 12, p. 148 (1893). 
Pseudoterpna baba, Hampson, Fauna Ind. Moths, Vol. 3, p. 480 (1895). 
Actenochroma baba, Swinhoe, Lep. Het. Oxford Mus. Vol. 2, p. 386 (1900). 
8. GeNUS ACTENOCHROMA, WARREN 
Actenochroma. Warren, Proc. Zool. Soc. Lond. p. 350 (1893). 
Characters. — Face sloping, somewhat protuberant below. Palpus moderate, stout, second 
joint rough-scaled, third joint in cf small, concealed (Q unknown). Tongue developed. Antenna in c 
with the joints distinct, ciliated. Pectus densely hairy. Femora somewhat hairy. Hindtibia in C' not 
dilated, all spurs present. Abdominal crests vestigial or wanting. Frenulum fully developed, Forewing 
with costa slightly arched, apex moderate, termen waved, oblique, cell less than one-half, DC incurved, 
SC! free, SC? from stalk of SC?9, R! separate, R? from above middle of discocellulars, M! separate; 
hindwing with apex rounded, termen rounded, faintly crenulate, cell short, DC? vertical, DC? deeply 
incurved, C approximated to cell to less than one-half, then rapidly diverging, SC? well separate, 
R? rather extreme. (c genitalia : uncus a long rod, on either side a triangular plate, gnathos pointed, 
harpe with sacculus extended into a long arm beyond end of harpe, penis pestillate. 
Early stages unknown. 
Differs from the preceding genus in shape, in subcostal venation (SC! free, SC? perhaps longer- 
stalked), in the hindleg structure and (slightly) in the antenna. As regards the venation, in spite of its 
known variability in the subfamily, no one can study it in this and the three preceding genera without 
