GEOMETMDAE. 



163 



Orsonoba itself, from which it differs little except in the simple antennae of both 

 sexes and some details of shape. Its range, as at present known, is from Penang 

 to the Solomon Is., and I consider it quite likely to be met with in Polynesia. 



It is perhaps necessary to point out that there is no possible justification 

 for transferring the name Gonodontis Hiibner to the present genus, notwithstand- 

 ing that Warren (Proc. Zool. Soc. Lond., 1893, p. 398, 1893) gave the folio wing- 

 citation : " Type, G. clelia Cramer." The diagnoses of the Familia in which 

 Hiibner places it, and of the Coitus Gonodontis itself, require a pale (not con- 

 colorous) hind wing, a regular, but dentate, termen to the latter, and the presence 

 of annular cell-spots on both wings ; hence it was quite certainly founded on 

 G. dentaria Hiibner (G. bidentata Clerck), to which were added, as a kind of after- 

 thought, the discordant species G. anceta Cramer and G. clelia Cramer. More- 

 over, Geyer (Zutr. Exot. Schmett., v, 14, 1837), in describing Polygonia cingillaria 

 and comparing it with " Gonodontis clelia" expressly states that the latter 

 really belongs to a new genus together with P. cingillaria — i.e. he transfers it 

 to his Polygonia (nec Hiibner). Since Rogenhofer in 1885 resuscitated Gonodontis 

 for G. bidentata, in lieu of Odonto'pera Stephens, the name has very generally 

 been used in that sense, in which its validity has never been questioned. 



29. Orsonoba clelia (Cramer). 



Uitl. Kapell., iii, (24), 172 and 174, t. 288 B, C, 1780 (Coromandel Coast). — Hampson, Faun. Brit. 



Ind., Moth., iii, 212, 1895. 

 Orsonoba rajaca Walker, List Lep. Ins., xx, 219, 1860 (Ceylon). — -Moore, Lep. Ceyl., iii, 395, t. 187, 



f. 1, lb, 1887. 



Orsonoba pallida Butler, Ann. Mag. Nat. Hist., (5), vi, 125, 1880 ; III. Eel., vi, 53, t. 114, f. 5, 

 1886 (N. E. Himalaya). 



Arrhodia orthotoma Lower, Tr. Roy. Soc. S. Austral., xviii, 83, 1895 (Queensland, type in Mus. 

 Tring, erroneously identified by Warren as Proboloptera cmbolias Meyrick). 



Upolu : Apia, 1 ?, lO.v.1922 (Armstrong). 



Tutuila : Pago Pago, 2 x.1923, i.1924 (Steffany). 



Previously known range : Ceylon, India, Burma, Penang, Hainan, Formosa, 

 Java, Flores, South Moluccas, Queensland, New Britain, Solomon Is. (Bougain- 

 ville, Florida, Tulagi, Gizo, Vella Lavella). 



In this species sexual demorphism is pronounced and individual variability 

 moderate, but I have not yet detected any sign of the formation of races. Not- 

 withstanding its extremely wide distribution, 0. clelia is very far from being a 

 pest, and the scantiness of the Samoan records is in keeping with most of 



