350 PROTECTION AGAINST INSECTS. 



1. Lophyrus pini, L. (Pine Sawfly). 



a. Description. 



Male with a wing-expansion of 15 16 mm. ; body black, 

 abdomen reddish at apex, spotted with white on the underside 

 of the first segment ; antennae doubly pectinate ; hind-wings 

 with a dark border. 



Female with a wing-expansion of 18 20 mm. ; body dull- 

 yellow, with the head, 3 spots on the thorax, and the middle 



Fig. 180. Lophyrus pirn, L. 



a Male. b Female. 







of the broad abdomen alone blackish ; wings yellowish, slightly 

 infuscate along the outer margins. 



Legs yellow in both sexes. 



Larva 25 mm. long, with 22 legs, changing colour as it 

 becomes older, finally of a dull green, with oblique rows of 

 little rugosities and a round brown bead, and black semicolon- 

 shaped marks above the prolegs. 



, Pupa enclosed in a 10 mm. long, leathery, and usually dark 

 brown cocoon. 



I. Life-ltixtonj. 



The sawfly appears in April and May, and again at the end 

 of July and in August. Only the $ appears to fly. The 

 much more numerous ? creep lazily along the twigs and 

 needles. The ? in April and early in May cuts slits into 

 Scots pine needles with her saw-like ovipositor, and lays 

 a sausage-shaped egg in each slit, depositing 10 to 20 in each 



