. 51 



includes the European Sarrothripa revayana (a British species), 

 and immediately precedes Gonopterinas, in which sub-family 

 Scolioptcryx is comprised, 



" Thyatira and Hab/osyne are members of the Cymato- 

 phoridae, a family which has been associated by some 

 authors with Arctiidae, by others with Notodontidae, and by 

 others again it is regarded as a branch from the same stem 

 which produced the Geometridse, and gave rise during the 

 process of evolution to Drepanulidas, as well as to Pyralidae, 

 and some other families belonging to the old-time ' Micro- 

 lepidoptera.' 



" The object of the present exhibit, however, is not to raise 

 any question touching classification, but only to point out 

 the very close superficial resemblance between species 

 belonging to the widely separated groups of moths, and to 

 incidentally remark on some points that appear to be of 

 interest in the species themselves. 



" With regard to Thyatira baits, the three specimens ex- 

 hibited are respectively from England, N.W. Himalayas, and 

 N. Japan (it occurs also in Amurland and W, China), and I 

 think it will be conceded that they are all very much alike. 

 Then we have one example of T. cogiiata, a darker insect, 

 with rather longer fore-wings than T. batis, and apparently 

 wanting the spot on the middle of the inner margin ; on 

 close examination of the fore-wing we shall, however, find 

 that the spot is there in its proper place, but so obscured by 

 the general dark suffusion that it escapes notice at first. 

 This specimen is from Sultanpore, N.W. Himalayas, and 

 the Indian T. batis is also from the same locality. If we 

 examine the under surface of these two insects we shall find 

 that there is no difference whatever between them. The next 

 species, T. aurorina, is from Japan (it occurs also in Corea 

 and Western China). Here we find that the basal patch is 

 very similar to that of T. batis, also that the patches at the 

 outer angle of each species are somewhat alike, but the spot 

 on the inner margin is really absent, and the patches on the 

 apical area are very different. Another species, Habrosyne 

 dieckmanni (Graes.), of which I do not possess a specimen, is 

 very like T. aurorina. 



" Risoba trimaciilata, it will be observed, is exceedingly like 

 Thyatira batis in colour and pattern of the marking, but the 

 former does not agree with the latter in neuration or in other 

 structural details. The three specimens of R. trimaciilata 

 are from the valley of the Yang-tse, China, and the species 

 also occurs in Amurland and Corea. 



