264 LEPIDOPTERA. 



from that of D. luteago, as described by M. Guenee, was 

 that its spiracles were black, whereas in that of luteago 

 they are described as being flesh-coloured encircled with 

 black. Its habits appeared to be identical with those of 

 typical D. luteago. 



Pupa rather cylindrical in the middle portion. The palpus- 

 covers rather tilled out in front of the head ; wing and limb- 

 covers smooth and brilliantly glossy but finely sculptured 

 with incised lines along the dorsal margin of the wing-covers ; 

 end of the tongue protruding in a conspicuous knob at the 

 end of the wings, the curl-m of the end of the tongue quite 

 visible ; dorsal and abdominal segments sculptured in pits, as 

 in the other species, and each with the usual smooth band ; 

 cremaster rather short and thick, with the spikes curiously 

 divergent, even forming a crescent ; colour generally rich 

 bright red-brown or darker red-brown ; anal spikes black. 

 (Pupa furnished by Mr. Kane for description.) Subterranean, 

 but apparently forming hardly any cocoon. In this condition 

 through the winter. 



The moth appears usually to hide in the daytime among 

 herbage, but has been taken sitting upon a rock. At dusk 

 it flies with great swiftness and visits the blossoms of the 

 large masses of Silene maritima growing among the rocks 

 close to the sea. The first specimen of which there is any 

 record was taken by myself on the 10th June, 1861, as it was 

 flying wildly round the lantern of the Bailey Lighthouse, Hill 

 of Howth, near Dublin. This s^jecimen remained for several 

 years unique, and finally was named, as a distinct species, by 

 Mr. Henry Doubleday. In 1865 two more specimens, male 

 and female, were taken close to the same place by Mr. E. 

 Birchall. In the next two or three years others were 

 secured by Mr. W. F. Kirby and others, and to the present 

 time this species has continued to be found in the same 

 restricted locality, and never in very large numbers. 



