142 PROF. J. O. WESTW'OOD ON NEW EXOTIC MOTHS. [JaH. 4, 



by the fall of a tree, their habit being to sit with the wings open 

 (flat?) on the tops of young leaves, then to take a slow flight round the 

 clear space without fluttering the wings, and to settle again at the old 



Fig. 1. 



Wings of CasUiiacrycina. 



place, whence, after remaining for a few minutes, they set ofl' again for 

 another round. He only found the species in this one spot, although 

 there were plenty of similar open spaces caused by fallen trees in the 

 neighbourhood. The flight of all the Castnice is generally very rapid ; 

 but in this one it is just the reverse, and they were very easy to take 

 either sitting or flying. He never took more than one any day ; and 

 sometimes for two or three weeks they seemed to disappear, when 

 suddenly one would be found in the same spot and on the same tree. 



Genus Saturnia, Fabricius. 



Saturnia arnobia, sp. nov. (Plate XII. fig. 2.). 



S. alis anticis npice siibacutis, pusticis rotimdatis, omnibus au- 

 rantiaco-fttlvis fitsco strigosis ocelloque medio, parvo, rofundato, 

 vitreo, fusco cincto, fere ejusdem ma(/nitudinis ornatis ; anticis 

 fascia parum undulosa inter basin et ocellum, altera submedia 

 per ocellum currenfe, marginem internum attingente, tertiaque 

 magis obliqua ad apicem alarum extensa et cum priore ad mar- 

 ginem internum connewa ; alis posticis fascia media fusca a medio 

 marginis analis fere ad marginem costalem {pone medium ejus 

 extensa), parti superce ocelli insidente, strigaque undulosa 

 fusco-rufa inter ocellum et marginem spatio inter strigam ex- 



