346 ME. a. BENTHAM ON OKCHIDE^E. 



Asiatic species, with which might be associated in the same section 

 G.fumata, Th\v., from Ceylon, and G. macrophylla, Lowe, from Ma- 

 deira. Lepidogyne,H\um(\ a single Japanese species, is only known 

 to me from Blume's figure and description. Hetceria, Blume, vari- 

 ously spelt Etccria and JEtheria, is a fairly natural genus of about 

 ten species, from the Indo-Australian and South-Pacific regions. 

 The original small-flowered species of Blume were also the types 

 ofLindley's genus Rhamphidia, and the larger-flowered species 

 forming Lindley's Cerochilus and Rhomhoda appear to be strictly 

 congeners ; nor can I find any adequate character to separate 

 generically Beichcnbach's Salacistis, which, however, I only know 

 from his figure and description. Mcercnhoutia, Blume, is a single 

 species from the Society Islands, nearly allied to Hetceria, with 

 which it is perhaps too closely connected through an unpublished 

 species from Niyiti-Levu. Platylcpis, A. Rich., is a distinct 

 genus of four or five species, from the Mascarene Islands and tro- 

 pical and South Africa, including Diplogastra angolensis, Welw., 

 which appears to me to be specifically identical with JYotiophrys 

 glandulosa, Lindl. But Notioplirys C'ommelyncp, Lindl., from 

 Taiti, is Mcerenhoatia plantaginea, Blume ; and Rlatylepis hetcro- 

 morpha, Beichb., from Upolu, in the South Pacific, may possibly 

 be another Mcercnhoutia ; but I have seen no specimen. Eucosia, 

 Blume, is only known from a single Javan specimen, which I 

 have not seen. Gymnochilus, Blume, two Mascarene species, is 

 scarcely distinct from Goodyera, except in the labellum being 

 uniform with the petals. Argyrorchis, Blume, a single Javan 

 species, is said to be only distinguishable from Macodes by the 

 same uniformity of the labellum with the petals. This character, 

 in the case of a few genera where it has been observed, especially 

 Paxtonia and Uropedium, has been attributed to an abnormal 

 peloria condition, whilst in Thclymitra it is a marked generic dis- 

 tinction, pervading through several species. It requires, there- 

 fore, further investigation in the case of Gymnochilus and Aryy- 

 rorchis. 



Subtribe 4. Dtuiude^e. — The great majority of this subtribe 

 are Australian genera, approaching Arethusea? in their vegetative 

 characters and Spiranthea? in their erect anther ; but I have felt 

 compelled to commence the series with three small Asiatic genera 

 which require further study, which we have not at present the 

 means of carrying out. These are Lccanorchis, Blume, one 

 Japanese and one Javan species ; Aphyllorchis, Blume, about five 



