classification of the PterophoridcB. 7 



COSMOCLOSTIS, n. g. 

 Forehead without tuft ; a high scaled transverse ridge between 

 antennae. Antennae in male — (?), in female minutely pubescent. 

 Palpi moderately long, very slender, filiform, 2nd joint ascending, 

 terminal joint almost as long as 2nd, porrected, somewhat pointed. 

 Posterior tibiae slightly thickened on origin of spurs. Fore wings 

 bifid, cleft fi-om before one-third ; no cell; 2 and 3 absent ; 5, 6, 7 

 absent; 9, 10, 11 absent. Hind wings trifid, 3rd segment without 

 black scales in dorsal cilia ; no cell ; 2 and 3 absent, 5 and 6 absent, 

 8 absent. 



Founded on the single species described below ; the 

 most extreme type known, with the longest fissure and 

 most degraded neuration ; it is therefore presumably one 

 of the most recently-developed forms, and apparently 

 originates from Trichoptilus. 



Teichoptilus, Wlsm. 



Forehead without tuft. Antennae in male minutely or mode- 

 rately cihated (one fifth to two-thirds). Palpi moderate, ascending, 

 2nd joint with short projecting scales beneath, tending to form a 

 short angular apical tuft, terminal joint short or long, filiform, 

 tolerably pointed. Tibiae thickened with scales on origin of spurs. 

 Fore wings bifid, cleft from before middle ; 2 out of 4 or absent, 

 3 absent, 5 and 6 extremely short, 7 absent, 9 absent, 10 absent or 

 from near 8, long, 11 long. Hind wings trifid, 3rd segment usually 

 with a few black scales in dorsal cilia ; 2 fi-om middle of cell, 

 3 absent, 5 and 6 very short, 7 to apex. 



I do not certainly know whether the name TricJioptilus 

 justly belongs to the genus here described ; Lord Wal- 

 singham founded the genus on a single Californian 

 species, T. pijgmmis, which I have not seen, and gives 

 no particulars of the neuration ; I believe, however, that 

 the species is congeneric with those described hereafter. 

 Besides the six given here, I have another species from 

 Mauritius, not in a condition to be described ; and I 

 consider that to this genus should probably also be 

 referred Aciptilus sicdiota, Z., Oxjjptilm Kollari, Stt., 

 and Acijjtilus calif ornicns, Wlsm. Of the six species 

 examined vein 10 of the fore wings was present in T. 

 compsochares and T. centctes. The genus is a degenerate 

 development of Oxyptilus. 



