HEP1ALUS YELLED A. 



BEAUTIFUL SWIFT. 

 Plate VIII. Figure 2. 



THIS insect measures from a little under an inch and 

 a quarter to an inch and three quarters, or even two 

 and upwards according to Mr. West wood, in width. Male : 

 front wings pale reddish or greyish brown, with a rather 

 large greyish white patch near the base, and a semi- 

 circular line of the same outside and between it, and 

 another light streak which runs from near the middle 

 of the lower edge to the upper edge, in a line with 

 the outer margin. In some specimens the pale marks 

 are obliterated. Hind wings dusky, with a narrow dull 

 orange border along the lower and outer edge. Female: 

 front wings less distinctly marked. Hind wings dusky. 



Localities for this species are Edinburgh, Inverary, 

 Kilmun, Argyleshire, Perth, Arran, Torwood, Stirling, 

 Killarney, Scarborough, Manchester, Burton-on-Trent, 

 Darlington, Sevenoaks, Worcester, Beverley, Darenth 

 Wood Kent, &c., &c. 



The dates of the appearance of the perfect insect are 

 June and July. 



The caterpillar feeds on the roots of the common fern 

 ( Pteris aquilinaj. 



This is a local species, but abundant where it occurs. 



