FAM. GEOMETRIDZE 161 
The two species placed here agree very exactly in structure, except that the type-species has the 
scaling very fine and thin, subdiaphanous. The difference in facies suggests the possibility that they 
have independently evolved from some cognate form (? in Prasinocyma), but the peculiar venation seems 
quite adequate for generic recognition. 
Type of the genus : Oxychora tenuis, Warren (1898). 
Geographical distribution of species. — Sunda Islands, New Guinea. 
I. O, tenuis, Warren. Buru (Sunda Islands). 
Oxychora tenuis, Warren, Novit. Zool. Vol. 5, p. 236 (1898). 
2. O. ruficincta (Warren). British New Guinea. 
Comostolodes ruficincta, Warren, Novit. Zool. Vol. r4, p. 132 (1907). 
I 13. GENUS GIGANTOTHEA, NOV. GEN., PROUT 
Gigantothea, nov. gen. Prout. 
Characters. — Face smooth. Palpus moderate to rather long, second joint rather close-scaled, 
third joint distinct, in cf moderately elongate, in Q rather longer. Tongue developed. Antenna longish, 
in gf bipectinate to little beyond one-half with moderate branches, in Q almost simple. Pectus hairy. 
Femora glabrous. Hindtibia in gf fully twice as long as tarsus, with sheath and long, strong hair-pencil, 
median spurs wanting; in Q with all spurs. Abdomen not crested. Frenulum in c* rather slender, from 
before basal expansion, in Q obsolete. Forewing with costa gently arched, apex squared or slightly 
acute, termen faintly waved, gently curved, oblique, cell less than one-half, DC? incurved (often deeply), 
SC! from cell, bicurved, approaching successively C (sometimes with short anastomosis) and SC?, 
SC? normal, R! stalked, R? from considerably above middle of cell, M! approximated to R?; hindwing 
with apex moderate, termen convex, somewhat waved, slightly prominent at R?, tornus pronounced, 
cell short, DC? somewhat curved, little oblique posteriorly, C approximated shortly to cell, then very 
strongly divergent, SC* stalked, R? from near R!, M! stalked. 
Early stages unknown. 
Probably near some Prasinocyma (e. g. vufistriga), nothwithstanding that the leg-structure is 
almost that of Hemithea. Several features recall CArysochloroma. 
Tyne of the genus : Giganlothea gigas (Warren) — Chlorochroma £tgas, Warren. 
Geographical distribution of species, — New Guinea. 
I. G. gtgas (Warren). British to Dutch New Gui- 
Chlorochroma gigas, Warren, Novit. Zool. Vol. 1o, p. 355 (1903). nea. 
2. G. minor (Warren). 
Chlorochroma gigas ab. minor, Warren, Novit. Zool. Vol. 10, p. 355 (1903). 
Chlorochroma minor, Warren, ibidem, Vol. 13, p. 85 (1906). 
I14. GENUS CENOSPILA, SwINHOE 
CE nospila (Warren, MS.) Swinhoe, Trans. Ent. Soc. Lond. p. 5 (1892). 
Characters. — Face smooth. Palpus with second joint long, smooth-scaled, third joint in 
cf rather short, in O very long. Tongue present. Antenna in c bipectinate to scarcely beyond one-half, 
in 9 lamellate, nearly simple. Pectus hairy. Femora glabrous. Hindtibia in c* much dilated, with strong 
