179 



HIBEENATION OF THE LARVA OF LYCMNA 

 ARGIADES. 



By F. W. Frohawk, M.B.O.U., F.E.S. 



During July, 1913, I obtained a large number of eggs from 

 L. argiades females which were captured at Eennes. Also many 

 eggs of this species from females captured in Hungary ; these 

 were laid during the first half of August. 



The larvae from both the French and Hungarian parents 

 entered into hibernation about the end of September. 



After the first moult the larvae became striped with brown, 

 the ground-colour being pale yellowish ; the medio-dorsal and 

 oblique side stripes brown, and the lateral stripe rust-coloured. 



After the second moult the ground-colour is pale ochreous- 

 green, the medio-dorsal and lateral stripes are rich purple- 

 brown, and the oblique stripes are paler. The colouring remains 

 similar until after the fourth and last moult, and when fully 

 grown the ground-colour is a very pale pinkish-ochreous ; the 

 medio-dorsal stripe is deep purplish-brown, the lateral stripe 

 light chocolate-brown, and the oblique side stripes light rust- 

 colour. They remain so coloured during hibernation. 



As the larvae develop, all the green colouring disappears; 

 and during the last stage no green form existed in any of the 

 larvae when they entered into hibernation. Some of the larvae 

 hibernated in the dead rolled-up leaves of Lotus corniculatus, and 

 some low down on the stems of the plant. They spin a fine 

 layer of silk to rest upon during hibernation. 



No brown form occurred in the last stage of the larvae reared 

 from eggs laid July 24th, 1904, by a female argiades captured 

 in the South of France. Although when young (after the first 

 moult) two distinct forms of the larvae appeared, one being 

 striped with brown, the other entirely green, with very slightly 

 darker green markings. After each subsequent moult the 

 striped forms gradually lost the markings, and after the last 

 moult all were entirely green, excepting a few which had the 

 lateral ridge tinged below with pinkish-brown. 



The larva? pupated at the end of August, and the imagines 

 emerged between September 6th and 18th inclusive. 



The complete life-history of this species I published in the 

 'Entomologist,' vol. xxxvii. pp. 245-9. 



NOTES AND OBSERVATIONS. 



Panoepa cognata (Neuroptbra).— Mr. H. Scott (University 



Museum of Zoology, Cambridge) has been good enough to send me a 



few new records of the scarce British scorpion-fly Panorpa cognata. 



They are: One male, Henley-on-Tharaes, June, 1906, collected by 



