31 Lord Walsingham on Western 



sentative forms in both. The species placed in the genera 

 Ohoreutis, Simaethis, and Glyphipteryx have near allies 

 among the Amazonian types, but could be matched 

 almost as closely by specimens from Assam and the 

 Malay Archipelago, while Tiquadra, another Brazilian 

 genus (to which a species is here added), is represented 

 in the late Mr. Fryer's collection from Japan. Nematois 

 parvella, in the Adeline, carries us at once to Borneo and 

 Sumatra for a careful comparison to enable us to 

 distinguish it from more than one species equally resplen- 

 dent ; and this is the more remarkable, inasmuch as the 

 Adeline are but poorly represented in all collections that 

 have hitherto reached us from the African region, and are 

 apparently unrepresented in South America ; while the 

 alliance of Ptilothyris is with Adelomorpha, hitherto only 

 known from a single species occurring in Celebes. 

 Alucita similalis, Wkr., affords a parallel instance, 

 strengthened by the absolute similarity of specimens from 

 both localities. These affinities will probably be more 

 strongly recognised when the mass of material in my 

 hands, illustrating this study from the islands of the Malay 

 Archipelago and the adjacent peninsula, as well as from 

 India and the extreme north of Australia, can be 

 thoroughly worked out a,nd described. 



My assistant, Mr. Durrant, has drawn and coloured the 

 figures for the plates which illustrate this paper under 

 circumstances of unusual difficulty, owing to the condition 

 of the specimens and the absence of any lengthened 

 series ; the extreme interest which attaches to many of 

 these unique forms being the chief incentive in under- 

 taking a task which he has achieved with remarkable 

 success. To make correct drawings of the neural 

 characters from ill-set and frequently contorted specimens, 

 requires not only much labour and patience, but an 

 intimate knowledge of structure which few possess, yet 

 this portion of the work is of the utmost importance in 

 instituting any comparison between what may be 

 regarded as grades of structural variation, chiefly interest- 

 ing for the light they may throw upon geographical 

 origin and distribution ; I must here express my 

 acknowledgment for the pains that he has taken to 

 ensure accurate delineation, as well as for the skill with 

 which he has reproduced the natural colouring. 



