69 



scientifically. The feelings of this class of persons Crabbe thus records in 



his " Borough " : — 



" There is my friend the weaver ; strong desires 

 Reign in his heart, this beauty he admires. 

 See to the shady grove he wings his way 

 And feels in hope, the raptures of the day — 

 Eager he looks, and soon to glad his eyes 

 From the sweet bower by nature formed, arise 

 Bright troops of virgin moths and fresh-born butterflies 

 — He fears no bailiff's wrath, no baron's blame, 

 His is untax'd and undisputed game." 



POLYOMMATUS DOKYLAS. 

 Dartford Blue. 



Dqbtlas, W.V. Ddry'las, one of the conspirators against Perseus, and 

 slain by him. Ovid Met. Y. 130. 



In Lewin's " Insects of Great Britain" published in 1875, figures are 

 given of a Polyommatus under the name of " Hyacintkus" of which he writes 

 * I met this new species of butterfly in the middle of July, flying on the side 

 of a chalk hill near Dartford, in Kent, and have no doubt but there was a 

 constant brood at that place, as I found them there for two successive years 

 on the wing, in the middle of the same month. The male is figured with the 

 wings expanded, at fig. 4 ; the female at fig. 5 ; and the under-parts at fig. 6." 

 Ochenheiner refers these figures to Dorylas, W.Y. J. E. Stephens in his 

 M Illustrations," doubtingly gives Lewin's insect as distinct from Adonis, and 

 in his last publication (the Museum catalogue), it stands as variety "a" of 

 that species. Henry Doubleday in the Zoologist, Yol. 21 writes, " I have 

 examined the specimens contained in the cabinet of the late J. F. Stevens. 

 They are certainly not Lewin's species, but merely ordinary specimens of 

 Adonis ; and the same may be said of the specimens marked • Ceronus, Hub./ 

 which is a variety in which the female is of nearly as brilliant a hue as the 

 male. I do not know whether any of Lewin's specimens are now in existance, 

 but his figures most certainly represent the sexes of P. Dorylas, which is 

 distinguished from Adonis by its paler blue colour slightly tinged with green, 

 immaculate cilia, and the absence of the two transverse ocelli at the base of 

 the superior wings beneath." The female is of the same colour as the male; 

 but the fore-wings are broadly bordered with black, and the hind-wings have 

 a row of bright fulvous spots round the hind-margin. 



The caterpillar is dark green, with yellow streaks and a black head ; and 

 lives on the flowers of Melilotus officinalis in Spring and Autumn, being 



