FAM. GEOMETRID/E 239 
with long, abruptly ceasing branches, in Q simple. Pectus scarcely hairy. Femora glabrous. Hindtibia 
in gf dilated. in both sexes with two pairs of unequal spurs. Abdomen not appreciably crested. 
Forewing with costa very slightly arched, apex moderate, termen entire, bowed, oblique, cell short, 
DC? usually incurved (occasionally DC?3? forming one gentle, continuous curve), SC! from near apex 
of cell or from near base of stalk of SC?5, free or anastomosing with C, R! stalked (arising after SC!), 
R? from above middle of DC, M! stalked (except in caerulea); hindwing elongate, with termen strongly 
rounded, apex also rounded, tornus not pronounced, cell short, DC slightly oblique, almost straight or 
with DC? weakly incurved anteriorly, C anastomosing with cell at a point near base, very rapidly 
diverging (except in caerulea), SC? stalked (usually shortly), R? from much above middle, M! stalked 
(except in caerulea). cf genitalia with uncus parallel, bifurcate at the tip, socii long and slender, gnathos 
pointed, harpe full with forked clasper, penis spatulate. (Akin to those of Comostola.) 
Early stages unknown. 
From Section II of Comostola, which it closely resembles in shape, this genus differs in the simple 
discocellulars; from Comostolopsis it is distinguished by its shape and by the fact that SC! arises 
before Rl, whereas in Comostolopsis the reverse is the case. 
Type of the genus : Pyrrhorachis Pyrrhogona (Walker) — Eucrostis byrrhogona, Walker — Pyrrho- 
rachis cornuta, Warren. 
Geographical distribution of species. — India to Australia. 
SEcTION I. — Hindwing with C anastomosing at a point; both wings with M! stalked, 
1. P. pyrrhogona (Walker). India to E. Australia. 
Eucrostis pyrrhogona, Walker, List Lep. Ins. Brit. Mus. Vol. 35, p. 1610 
(1866). 
Iodis marginata, Lucas, Proc. Linn. Soc. N. S. Wales (2), Vol. 3, p. 1267 
(1888). 
Comostola pyrrhogona, Meyrick, Trans. Ent. Soc. Lond. p. 491i (1889) 
(var.? — ead. ac cornuta, Warren) 1). 
Euchloris pyrrhogona, Hampson, Fauna Ind. Moths, Vol. 3, p. 500 (1895). 
Eucrostes pyrrhogona, Hampson, ibidem, Vol. 4. p. 566 (1896). 
Pyrrhorachis pyrrhogona, Warren, Novit. Zool. Vol. 3, p. 292 (1896). 
Pyrrhorachis cornuta, Warren, ibidem, p. 292 (1896) (var. ?) 1). 
2. P. albifimbria (Waxren) (huj. gen.?). Khásis. 
Comostola albifumbria, Warren, Novit. Zool. Vol. 3, p. 105 (1896). 
3. P. deliciosa (Warren). Natuna Islands. 
Comostolodes deliciosa, Warren, Novit. Zool. Vol. 3, p. 365 (1896). 
4. P. viridula, Warren. British New Guinea. 
Pyrrhorachis viridula, Warren, Novit. Zool. Vol. 1o, p. 363 (1903). 
5. P. castaneata (Warren). British New Guinea. 
Comostolodes castaneata, Warren, Novit. Zool. Vol. 13, p. 87 (1906). 
6. P, ruficepbs, Warren. British New Guinea, 
Pyrrhorachis ruficebs, Warren, Novit. Zool. Vol. 13, p. 89 (1906). 
7. P. rubripunctata (Warren) (huj. gen.?). Japan. 
Microloxia rubripunctata, Warren, Novit. Zool. Vol. 16, p. 125 (1909). 
SEcrION II. — Hindwing with C approximated for some distance; 
both wings with DC* oblique, M! separate (vix huj gen.). 
8. P. caerulea (Warren). N. India. 
Comostola caerulea, Warren, Proc. Zool. Soc. Lond. p. 354, t. 31, f. 1 (1893). 
1) We are not able to appreciate any constant differences between the New Guinea specimens (corzméa, Warren — yrrZogona, Meyrick) and 
the Indian, those pointed out by Warren being inconstant. Probably Warren's na ue should be treated as strictly a synonym, or at best an aberration. 
