162 



INSECTS OF SAMOA. 



only species yet known to me having the type of fovea to which attention is 

 here called are : C. displicata Walker (Queensland : structurally distinct in the 

 non-dilated hind tibia of the and in the absence of the tufts of raised scaling, 

 except the slight ones of the cell-spots) ; C. mjobergi Prout (Borneo : a large 

 species, with entirely dissimilar facies and also lacking the raised scaling) ; and 

 the immediate circle of C. decisaria. The members of the latter agree so closely 

 in many respects that they must surely have had a common origin ; a specimen 

 from the Philippines, belonging to an unnamed species, has the central armature 

 of the valva somewhat similar to that of C. hemiopa, but has a longer and stronger 

 marginal hooked process than that in C. decisaria ; another (also unnamed) 

 example, from Lifu, has not been studied anatomically, but may well represent 

 a weakly marked race of C. decisaria, with a rather strong dark mark on the post- 

 median of the fore wing at, and just in front of, vein R 3 . 



Orsonoba Walker. 



List Lep. Ins., xx, 218, 1860. — Moore, Lep. GeyL, in, 394, 1887. — Hampson, Faun. Brit. Ind., 

 Moths, iii, 211, 1895.— Turner, Proc. Linn. Soc. N. S. Wales, xliv, 286, 1919. 



This genus was erected solely for P. clelia Cramer (under its synonym 0. 

 rajaca Walker, t. cit., 219, Ceylon), which remains the only well-known and 

 widely distributed species. Its two closest allies are 0. variaria Leech (1897, 

 W. China), and 0. aethocrypta Prout (1927, Upper Burma). A somewhat 

 more distant relative is 0. zapluta Turner (1904, Queensland). " Erosia " 

 Jiyperbolica Swinhoe, which Hampson (overlooking the pectinate $ antenna !) 

 pronounces to be "a dwarf (30 mm.) brownish ochreous female " of 0. clelia, 

 and of which the type was taken at Karachi, and two kindred Mediterranean 

 species (Coenina dentataria Swinhoe and 0. paulusi Rebel) have narrower 

 wings and are better referred to the African genus Coenina Walker (vide Seitz, 

 Macrolep., iv, 349, 1915). 



In the Malayan and Papuan Subregions, the branchings from Orsonoba, 

 which I assume from its range to be the phylogenetically older form, have pro- 

 ceeded along other lines. An endemic Australian genus, Proboloptera (? Meyrick) 

 Turner (Proc. Linn. Soc. N. S. Wales, xliv, 287, 1919), unknown to me in nature, 

 is said to differ from it in having the antenna pectinate to the apex, and the 

 irons with a rounded or conical corneous projection. Another genus, Xylino- 

 phjlla AVarren = Adelphocrasta Warren, is almost as widely distributed as 



