148 INSECTS OF SAMOA. 



world-wide group to which it belongs, the modifications are chiefly in the 

 hind wing, which is often extremely narrowed and contorted, its posterior part 

 commonly cut or folded into simple or composite lobes or pockets. The 

 Holarctic genera (Lobophora group) are in the main the least extremely 

 specialised, and have the palpi normal. In Sauris the latter are more often 

 abnormally long, as is frequently the case in the endemic Tatosoma of New 

 Zealand, which differs from Sauris in having three spurs on the hind tibia and 

 the areole double, whereas in Sauris the $ hind tibia is spurless, while the $ 

 has two spurs on its hind tibia and a simple areole. Rhopalodes, of Tropical 

 America, has the areole double and all spurs present, but is remarkable in having 

 clubbed antennae. The Chilian representatives of the group (Tomopteryx, 

 Lagynopteryx, Hoplosauris and several others) show great diversity of structure, 

 including some of the most extreme reductions of the hind wing, but hitherto 

 have not received much in the way of detailed study. 



In a first rough analysis of Sauris I have recognised thirteen structure- 

 groups, which include the following " genera " of Guenee and Warren : 

 Dystypoptila Warren, Holorista Warren, Pseudoschista Warren, Helminthocerqs 

 Warren, Remodes Guenee, Anthierax (Warren, Nov. Zool., xii, 11, 1905, in- 

 descr.), Coptogonia Warren, and Anisocolpia Warren. Possibly one or two of 

 these may prove generically tenable, but the majority are clearly shape-sections 

 of an indivisible entity. It is noteworthy that the $ hind wing shows three types 

 of venation, which may have some phyletic significance : (1) K^-M 1 connate 

 or just separate (S. lichenias Meyrick, 1891, only 1 $ known to me) ; (2) R 3 -M l 

 stalked (the great majority) ; (3) B^-M 1 coincident (S. hirudinata Guenee, 

 1858, S. muscosa Rothschild, 1915 [hirudinata subsp. ?] and S. august a 

 Warren, 1905). 



S. elaica Meyrick and its Lifu relative (vide supra, p. 132) probably belong 

 to the section which is typified by S. remodesaria Walker (1862 — Remodes auctt., 

 nec Guenee), and have, in addition to the contorted hind wing, a more or less deep 

 cleft in the termen of the fore wing between the median veins, and tufts of 

 specialised scales and of hair on the tornal lobe thus formed. This section con- 

 tains also the following, besides a few species and races at present undescribed : 

 S. melanoceros Meyrick, 1889, British New Guinea ; S. vetustata Walker, 1866, 

 Australia [Queensland] ; *S. auricula Warren, 1895, Perak ; S. parviplaga 

 Warren, 1906, New Guinea ; S. cirrhigera Warren, 1897 = S. nusta Swinhoe, 

 1902, New Guinea and eastward as far as the Bismarck Archipelago, perhaps 



