On Lepidoptera Heterocera from Qkina, &o. 297 



Appendicular Skeleton. 

 Resting upon the rim of chondrocranium which projects 

 behind the occipital border of the cranial shield is a single 

 pair of large supratemporal plates, each tapering towards the 

 middle line, and from beneath this shield there emerges 

 behind a pair of still larger post-temporal plates marked with 

 small pittings, apparently of the sensory canal-system, near 

 its outer border (Brit. Mus. no. P. 6 908 a). There is nothing 

 worthy of remark in the imperfectly known pectoral arcli 

 which these elements support, and the number of the pectoral 

 basals still remains to be discovered. There are, however, 

 several good portions of pectoral fins, and when viewed from 

 below these exhibit the slightly lobate form of the appendage 

 {e.g. no. P. 6908c). The slender anterior fulcra seem to 

 have fused with the foremost ray, and this is hence remark- 

 ably stout ; at its upper end it exhibits a very large concave 

 articular facette. The hindermost rays of the fi.n are short 

 and excessively delicate. The .pelvic bones are separate, 

 contracted mesially, and expanded at each end, and the small 

 pelvic fin is fringed with conspicuous slender biserial fulcra. 

 The fulcra on the median fins are also large, slender, and 

 biserial, and the tips of a hy^ of the gradually lengthening 

 anterior rays of these fins are successively lost in the fulcral 

 series (no. P. 6909). At the base of these fins, it may be 

 added, the few fulcral scales are simple, not subdivided into 

 two halves. 



Squamation. 

 The scales are very thin over the whole of the trunk and 

 only appear thickened on the atrophied upper caudal lobs 

 (no. P. 6909). Their exposed face is distinctly rhombic and 

 often punctate or partly striated, but chiefly marked by the 

 concentric lines of growth. 



[To be continued.] 



XXXI. — On Lepidoptera Heterocera from China, Japan^ and 

 Corea. By John Henry Leech, B.A., F.L.S., F.Z.S., &c. 



[Continued from p. 235.] 



Genus RUMIA. 

 (Dup. 5 Ilampson, Fauna Brit. Ind., Motlis, iii. p. 183 (1895),) 



Rumia tridentifera. 



Rumia tridentifera, Moore, Lep. Atk. p. 30 (1887) ; Hampaon, Fauna 

 Brit, Ind,, Moths, iii. p. 184 (1895). 



Five male specimens and one female received from Ta- 

 chien-lu, Pu-tsu-fong, and How-kow: June, July, and August. 



