FAM. GEOMETRIDZE 45 
Boarmia ocultaria, Boisduval, Faune Ent. Pacif. Vol. 1, p. 257 (1832). 
Hypochroma occultaria, Guenée, Spec. Gén. Lép. Vol. o, p. 281 (1858). 
Crypsiphona occultaria, Meyrick, Proc. Linn. Soc. N. S. Wales (2), Vol. 2, 
p- 903 (1888). 
3 C. amaura, Meyrick. W. Australia 
Crypsiphona amaura, Meyrick, Proc. Linn. Soc. N. S. Wales (2), Vol. 2, 
p- 902 (1888). 
21. GeNUs SYNCLYSMUS, BUTLER 
Synclysmus. Butler, Ann. Mag. Nat. Hist. (5), Vol. 4, p. 242 (1879). 
Characters. 
Face and vertex rough-haired. Palpus small, second joint rough-scaled, third 
joint in gf minute, concealed (Q unknown). Tongue wanting. Antenna short, in cf bipectinate to about 
two-thirds, with long, rapidly decreasing pectinations. Pectus and femora strongly hairy. Hindtibia 
in gf rather short, greatly swollen, with terminal spurs only. Metathorax apparently crested (abraded). 
Abdomen crested. Frenulum fully developed. Forewing with costa straight (or almost concave) in 
proximal part, arched distally, apex moderate, termen rather straight, faintly waved, cell about one-half, 
DC gently incurved, SC! free or anastomosing with C, SC?? normal, R! just separate, M! separate; 
hindwing with apex rounded, termen waved, rounded, inner margin long, cell almost one-half, DC some- 
what incurved, becoming oblique, C approximated to cell for some distance, then moderately rapidly 
diverging, SC? connate, R? from somewhat above middle of DC, M! connate or just separate, M? from 
near M!. 
Early stages unknown. 
"This and the following genus are probably not very nearly related to those that have preceded, 
though they seem to be derivatives of the same main stirps. Their white or whitish colour dissociates 
them superficially therefrom. 
Type of the genus : Syaclysmus niveus, Butler (1879). 
Geographical distribution of species. — Madagascar. 
I. S. niveus, Butler. Madagascar. 
Synclysmüs niveus, Butler, Ann. Mag. Nat. Hist. (5), Vol. 4, p. 242 (1879). 
22. GENUS XENOCHROMA, WARREN 
Xenochroma, Warren, Novit. Zool. Vol. 9, p. 497 (1902). 
Characters. — Face not protuberant, shortly scaled. Palpus rather short, rather slender, 
second joint shortly scaled, third joint quite small. Tongue short and slender. Antenna (in Cf not 
certainly known) in 9 bipectinate to beyond two-thirds, with short branches, apex nearly simple, with 
single short bristles, or merely serrate. Pectus strongly hairy. Hindtibia in cf much dilated (salsa), in 
both sexes with terminal spurs only. Abdomen crested, in Q very robust. Frenulum developed, or in 9 
rather weak, costa of hindwing without appreciable basal expansion. Forewing with costa slightly 
arched, apex acute, termen not crenulate, in the type species strongly elbowed at M!, cell less than 
one-half, DC incurved, SC! free, from cell or connate with SC?», SC? normal, M! stalked or just separ- 
ate; hindwing with apex moderate, termen convex, in type species strongly elbowed at M!, cell less 
than one-half, DC incurved, C approximated closely to cell for a short distance (sometimes fused at a 
