274 LEPIDOPTERA. 



Underside of the foro wings pale smoky-jmrple, with a dull 

 yellow triangle before the apex. Hind wings rather paler. 

 Body and legs purple-brown. 



On the wing in August and September. 



Larva and Pupa apparently unknown. 



Very little is known of this rare species. In August 1879 

 a single specimen was taken, and in August and September 

 1880 three more, all by Mr. W. Thompson, at Stoney Strat- 

 ford, Bucks ; and another collector was reported to have 

 taken three or four more at the same place. All these seem 

 to have been attracted by light, and those captured by Mr. 

 Thompson came to the lamps between 11 p.m. and midnight- 

 Strange to say no further specimens have been recorded 

 here, and no cause seems to have been assigned for the 

 presence of this scarce species in this country, yet the 

 specimens, some of which I have seen, appear to be quite 

 reliable. Abroad its range is very small, being apparently 

 confined to Lapland, Finland, and Livonia. 



3. P. costalis, Fah.\ flmbrialis, Hchiff. — Expanse -|- to | 

 inch. (15-23 mm.). Fore wings rich shining crimson-purple 

 with two yellow costal spots ; hind wings more crimson ; cilia 

 of both broadly brilliant yellow. 



AntennEO of the male simple, short, dull yellow ; palpi 

 slender and small, rather wide apart and upturned, purplish- 

 yellow ; head dull yellow ; thorax and abdomen shining 

 purplish-crimson. Fore wings narrowly trigonate ; costa 

 straight ; hind margin a little rounded ; apex bluntly angu- 

 lated ; colour rich shining purplish-crimson ; on the costa are 

 two large triangular rich yellow spots, from which proceed 

 the first and second lines, of the same colour but slender and 

 often exceedingly faint ; extreme hind margin, with the cilia, 

 conspicuously rich yellow. Hind wings rather short, rounded 

 behind ; rather brighter purplish-crimson, with two very 



