310 FOREST ENTOMOLOGY. 



abdomen. The thoracic portion of the body is also yellow, with two 

 longitudinal dark bars on the lower portion of the thorax. The legs 

 are variable in colour : the first two pairs are of a yellowish colour, 

 with darkish tarsi. In the hind pair, the portion adjoining the body 

 is also a light - yellow colour, and the middle portion of the whole 

 is conspicuously black, and the tarsal portion light brown. Eyes 

 same as in apterous form. The wings are comparatively long and 

 narrow ; veins light brown, and broadly clouded at their apices. 



Genus Lachnus. 



This genus is rather interesting from a sylvan point of view, inas- 

 much as the species are all arboreal feeders. According to Buckton, 

 one species lives on willow, while the others prefer the oak or conif- 

 erous trees. 



As regards the leading points which characterise the genus, it may 

 be said that the rostrum is very long and slender ; antennae six- 

 jointed ; small cornicles ; inconspicuous tail ; very long legs and large 

 wings, with the cubital vein twice forked. 



Perhaps the most conspicuous species are L. pint, on Scots pine, 

 and L. longipes, on oak, the former, from the damage done to young 

 Scots pine in early spring, and the latter, as conspicuous by the eggs 

 in autumn. 



The insects are very heavily bodied, and the winged specimens are 

 but poorly balanced for flight. 



Lachnus pint (Linn.) 



This species is found on Scots pine (Pinus sylvestris), and is fairly 

 common, more especially in smoky districts, where the young trees 

 do not thrive over-well. During the winter months the eggs, which 

 are comparatively large and black, may be found scattered amongst 

 the leaves or on the bark of the shoots. 



In late spring or early summer, when the insects hatch out, they 

 make their way to the very tips and there congregate themselves, 

 and when an attempt is made to collect them they become very active 

 in their motions. 



The apterous form is very large, of a dull brownish-grey colour, 

 black eyes, slender antennas, long legs, and the body rather hairy, but 



