390 LÉPIDOPTÉROLOGIE COMPARÉE 



Hybrids between " Lycia hirtaria " and " Poecilopsis pomonaria. " 



(A) Lycia hirtaria (^ x Poecilopsis pomonaria Q = hyhx'id pilsii 

 (Standfùss Ent. Zeit., Guben IV, page 142-143). 



Though, as was stated above, the ova resulting from the above 

 cross are only laid with difhculty, when once laid, nearly ail are 

 fertile. It is no unusual occurrence for 90-100% to émerge and 

 to be reared safely. 



Food plants. 



Again the young larvae, although so apt to escape, take readily 

 to their food and commence to feed almost immediately. Ali 

 the food plants they prefer are forest-trees and shrubs, and of 

 thèse, they iike hawthorn {Cratœgns oxycantha) plum {Prunus 

 communis), sloe {P. spinosa) sallow (Salix caprea) and oak 

 (^Quercus robur) best. On account of its powers of keeping fresh 

 Cratœgus is always used. 



Description of larvae. 



ist INSTAR. 



Length at the end 4,5 mm. 



Owing to the great similaiity between the young larvae of 

 hirtaria and pomonaria, one can point out but few différences in 

 the three larvoe hirtaria, pomonana and pilzïi at this stage. 



Ail hâve black heads and are blackish in the ground colour, 

 and also, ail hâve the usual white transverse bars and spots on 

 the ûrst five abdominal segments. Thèse bars and spots are 

 almost continuous to the unaided eye, but, under a lens, they are 

 found to consist of two transverse dorsal bars, at the lower ends 

 of which, on the future supraspiracular stripe, is a white spot 

 somewhat large in hirtaria, but minute in pojnonaria. In this pïlzii 



