FAM. GEOMETRIDZE 155 
anastomosing with C, scarcely ever with SC?, SC? normal, R! connate or short-stalked, rarely separate, 
R? occasionally from much above middle, M! about connate; hindwing with termen rounded or weakly 
subcrenulate, or weakly elbowed at R? (never with pronounced tail r), cell somewhat less than one-half, 
DC? variable, sometimes very deeply incurved, C approximated to cell for some distance, very 
occasionally with brief anastomosis, diverging near middle, SC? stalked, R? occasionally from near R!, 
M! usually connate or stalked. c genitalia with uncus pointed, with small round socii, harpe angulated, 
penis pestillate, thickened and swollen in the centre; eighth sternite terminating in two points 
(vermicularia; albicosta and floresaria have also been examined, and suggest that there will be a good deal 
of variation, together with a definitely traceable relationship; but the structure-group is a large one, 
embracing Jodis, Hemistola, Comostola, etc., and not remote from the Hemithea-group). 
Early stages scarcely known. 
As Dr. Turner has observed (Proc. Linn. Soc. N. S. Wales, Vol. 35, p. 597), « the species included 
in this genus show considerable variety of facies, and considerable variation also in certain details of 
structure, and may possibly need to be divided ». None of the structural characters which we are using 
in the present work, however, seem to admit of such division on any satisfactory basis, and the varia- 
tions are really not extreme. In the New Guinea group which Warren has made the basis of his 
Pauvesthes, Poecilostigma and Pyrrhaspis, DC? shows a strong tendency to exaggerated incurvature, DC? of 
the forewing is sometimes oblique basewards (i. e. apex of cell produced), DC? of the hindwing, or 
of both, sometimes somewhat oblique outward, resulting in an acute angulation at the base of R^; but 
these forms appear in varying degrees, and are in part shared by other sections of the genus, so that 
we have not been able to utilize them. The scaling of the species is usually rather fine and thin, often 
with white strigulation (reminding of TZalassodes), but this is by no means invariable. The abdomen is 
occasionally adorned with a dorsal pattern, and exceptionally (e. g. coerulea) the largest of the spots may 
be slightly embossed; but there are never any real crests. 
Type of the genus : Prasinocyma vermicularia (Guenée) — T/halassodes vermicularia, Guenée. 
Geographical distribution of species. — Indo-Australian, -thiopian. 
1. P. vermicularia (Guenée). S. Africa. 
Thalassodes vermicularia, Guenée, Spec. Gén. Lép. Vol. o, p. 359 (1855). 
T halassodes dilucida, Walker, List Lep. Ins. Brit. Mus. Vol. 22, p. 548 (1861). 
2. P. simiaria (Guenée). Senegal. 
T'halassodes simiaria, Guenée, Spec. Gén. Lép. Vol. 9, p. 359 (1855). 
3. P. germinaria (Guenée). Abyssinia. 
T'halassodes germinaria, Guenée, Spec. Gén. Lép. Vol. o, p. 360 (1858). 
4- P. cellularia (Guenée). Réunion. 
Thalassodes cellularia, Guenée, Maillard's La Réunion, Annexe G, p. 32 
(1862). 
5. P. congrua (Walker). W. Africa to Uganda. 
Geometra congrua, Walker, Proc. Nat. Hist. Sec. Glasgow, Vol. 1 (2), 
P- 371 (1869). 
Thalassodes nigripunctata, Narren, Novit. Zool. Vol. 4, p. 46 (1897). 
T'halassodes congrua, Swinhoe, Trans. Ent. Soc. Lond. p. 544 (1904). 
6. P. scissaria (Felder). S. Africa. 
T'halassodes scissaria, Felder, Reise Novara, Lep. Het. t. 127, f. 9 (1875). 
7. P. hadrata (Felder). Cape. 
N'emoria (?) hadrata, Felder, Reise Novara, Lep. Het. t. 127. f. 27 (1875). 
Thalassodes hadrata (paxt.), Swinhoe, 'Trans. Ent. Soc. Lond. p. 544 
(1904) 2). 
1) Except in cxossofa, which we have not seen and which is quite doubtfully placed. 
2) The specimen from the Gold Coast, referred here by Swinhoe, is quite wrongly determined, a damaged Q perhaps related to a/órsfic/a, Warren, 
