﻿NEW SPECIES OF NOCTUID^ FROM FORMOSA. 159 



place near Tetsworth, about four miles off. But the butterfly is 

 certainly extremely local in its occurrence about here. 



C. rubi. — Common about the edges of the hill woods. 



C. phlcsas. — Generally common. 



C. argiolus. — Fairly common in most springs about holly trees 

 and in gardens, also a few specimens at bramble of the second brood ; 

 unusually abundant last year (1914). 



G. minimus. — Common in Watlington Gully above the chalk-pit. 

 A few met with in other hill localities. 



P. corydon. — Met with in profusion every year in Watlington 

 Gully, and other like places about hills. 



-P. bellargus. — My experience of this butterfly is remarkable. For 

 years I searched for it in vain. At length, in 1899, in looking over 

 a box of insects caught by a son of the late Mr. R. Peel (then living 

 in the house on Pyrton Hill which I now inhabit), I saw three un- 

 mistakable specimens. Eagerly enquiring place of capture, the boy 

 said, " Why ! they are all over the hill." (That was late in August.) 

 Needless to say I kept my eyes open on my way home, and, sure 

 enough, there were several adonis {bellargus) on the wing. Next day 

 I came with a net and captured half a dozen. I could have taken 

 more, but, finding them already somewhat worn, left them in the 

 hope of a brood in the following year. Now a point to note is that 

 I was in the habit of crossing that particular hill at least once a week 

 in the ordinary course of my parish work, and had the parents of 

 this autumn brood been there in the spring I do not think I could 

 have failed to notice them. It appeared to be a clear case of an 

 autumn migration. Naturally in the following year, 1900, I was on 

 the alert. The butterfly occurred in fair numbers, both spring and 

 autumn broods, in that locality and others distant a mile away. After 

 1900 it disappeared, and has never, to my knowledge, appeared again. 

 Why it failed to establish itself permanently is a mystery to me, as its 

 food-plant, Hippocreiyis comosa, is fairly common in the places where 

 the butterfly was taken, and, as our hills are not grazed by sheep or 

 cattle, there would be no risk of destruction of the brood from that cause. 



P. icariis. — Common everywhere. 



P. medon. — Fairly common all over the hills. 



I have not met with P. agon in the district. 



H. malvcs, N. tages, A. flava, A. sylvanus. — Common in the 

 gullies. (I have not detected lineola.) 



A. comma. — Sparingly taken in Watlington and Pyrton gullies. 

 Appears to be rather local. 



Pyrton Hill, Watliugton, Oxou : May, 1915. 



NEW SPECIES OF NOCTUID^ FROM FORMOSA. 



By A. E. WiLEMAN, F.E.S. 



Corgatha tornalis, sp. n. 

 ^ . Head, thorax and abdomen pale reddish brown, the latter 

 marked with blackish except on basal segments. Fore wings pale 

 reddish brown, costa blackish on basal two-thirds, a white dot on the 



