254 THE ENTOMOLOGIST. 



of all four species described in this paper.) Each abdominal 

 segment has dorsally a row of spikelets pointing rearwards, 

 and a number of spines which also point to the rear. 



Out of about two hundred larvfe collected, about five dozen 

 imagines resulted ; the remainder were infected by parasites, 

 which were especially fatal to those feeding on Mt/rica gale. 

 The imagines commenced to emerge with me at Croydon on 

 August 12th and the last on September 1st. I gather tbat 

 Mr, Whittle's specimens, which were kept in all their stages in 

 the cooler air of their northern mountain home, were about a 

 week later. 



P. lijjsiana, Schiff. . 



Ova. — The ova is horizontal, '9 mm. long, "48 mm. broad, and 

 ^18 mm. high ; the surface is opalescent and divided by very fine 

 slightly raised ribs into a large number of irregularly-shaped 

 spaces ; when newly deposited the envelope is transparent and 

 colourless, with an irregular-sbaped nucleus yeDowish-green in 

 colour; this nucleus extends to almost the entire area. The 

 ova was deposited on a spray of T". niyrtillus on April 27th, 1918. 



Larva. — In early instars, probably second or tliird, the head 

 is dark brown and intensely glabrous, as is the prothorax, which 

 is black, divided in centre longitudinally by a very thin whitish 

 line. The junction between the head and prothorax is dark 

 brownish-green ; the segments at the rear of the prothorax and 

 the claspers are dark brownish-green ; the thoracic legs and feet 

 are black and glabrous ; the anal plate is hardly noticeable ; 

 tubercles and spiracles inconspicuous. 



The larva in the last instar and full fed is 13 mm. long; the 

 head is light chestnut-brown, darker round the mouth, highly 

 glabrous, and with the lobes prominent. The prothorax is 

 glabrous, greenish -brown in front ; at the rear there is on each 

 side a semi-crescent which is intensely black ; the prologs atid 

 feet are brown and glabrous ; the segments at the rear of the 

 prothorax and the claspers are brownish-green, somewhat lighter 

 than in the earlier stages ; the anal plate, tubercles and spiracles 

 are not conspicuous. 



Pirpa. — The pupa is 8 mm. long and 1'75 mm. broad, rather 

 slender. The head, thorax, and wing-cases are dark brownish- 

 black, slightly glabrous but roughened ; the wing-cases are 

 striated longitudinally. The cases of antennae are prominent ; 

 the head is rounded and is without a jiupa opener ; the wing- 

 cases extend to the rear of the fifth abdominal segment. The 

 abdominal segments are dark reddish-brown with a tinge of 

 green ; each abdominal segment has dorsally a transverse row 

 of spikelets in the centre, and one not so large in the front and 

 rear; it has also some spines, all of which, spikelets and spines, 

 point rearwards. 



