350 



PROTKCriOX AdAIXST IXSECTS. 



1. L()])]ii/niH i)ini, L. (Pine Sairjltj). 



(1. /Jesrrijilio/K 



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 douljly 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 



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, Avith oblique rows of 

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

 shaped marks above tlie prolegs, 



Piijnt enclosed in a 10 mm, long, leathery, and usually dark 

 brown cocoon. 



b. Life-history. 



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 hi each 



