178 THE ENTOMOLOGIST. 



now lipped with dark brown, its head and the whole of its 

 body being of a beautiful pale green, and its dorsal vessel 

 charged with a faint orange-coloured fluid ; the ventral sur- 

 face of the thoracic segments is spotless, and the band on 

 the anal claspers has a faint brownish tinge : when the larva 

 has arrived at this epoch of its existence it remains for 

 a lime in a quiescent state ; eventually, however, it splits 

 open its mine, and, falling to the ground, buries itself in the 

 earth. We may, however, occasionally meet wilh an instance 

 where the larva has entered upon its pupa state within the 

 mine itself: it is very apt to pursue such a course when con- 

 fined in a breeding-jar. In constructing its cocoon the larva 

 first describes a circle with its body ; it then appi'opriates a 

 portion of the upper and under cuticle of the mined part of 

 the leaf, the inner margin of the circular-shaped abode being 

 fastened down with silk, and the larva afterwards spinning a 

 thin layer of silk over the whole of the interior: so far as I 

 have yet been able to learn, this mode of proceeding applies 

 with equal force to all the varions leaf-mining Tenthredini- 

 deous larvae that occasionally form their cocoons within the 

 mined leaves. Its usual mode of passing the pupa state is to 

 enter the ground ; but on wliatever course the larva may 

 decide in this respect, its parasite waits patiently until the 

 Tenthredo larva has formed its cocoon before it quits its 

 bofly and spins its own cocoon inside that of its victim. 

 Like the larvae of Phyllotoma melanopyga and P. Tornien- 

 tillae, this species may be collected and the perfect insects 

 bred from the date of their appearance till the end of 

 October : at the end of September the imagos, as a rule, 

 cease coming out for the season, the little Tenthredos ap- 

 pearing the following spring. The larvas destined to ])ro- 

 duce imagos the following year, remain unchanged till the 

 early part of the next season before entering the pupal slate. 

 The larvae are common on the alders growing at Slnrlev, 

 Surrey. — Charles Healy ; ,74, Napier Street, Hoxton, N. 



Entomological Notes, Captures, 8fc. 



Colias Hyale. — During the end of July and commence- 

 ment of August last, this species was the commonest butterfly 



