l62 MAINE AGRICULTURAL LXPLRIMLNT STATION. I912. 



4.2 mm long. Tarsus with first joint elongate (0.15 mm at 

 longest dimension) subequal to half of second joint (0.15 mm) 

 and claws measuring about o.i mm. Abdomen black, hirsute, 

 and caudad of cornicles with short heavy white flocculency. 

 Cornicles black and tuberculate. 



This large form in life is conspicuous on account of the con- 

 trast of the dull black abdomen cephalad the cornicles and the 

 flocculency, thick but not long, caudad the cornicles. They rest 

 on four front legs and when disturbed wave the long bowed 

 hind pair around in the air. They were abundant on branches 

 of Abies balsamea Mill at Orono, Sept. 26, 1908 at which date 

 many were in copulation. Specimens in the insectary deposited 

 eggs on fir needles. The eggs are elongate, dark but covered 

 with white pulverulency which gives them a gray appearance. 

 They have a slight concavity on the side applied to the leaf. 



Alate male. Head black, slightly pulverulent. Antennas I, II, 

 black; base of III pale, tip dusky; IV, V, VI dusky. Ill, IV, V 

 and VI tuberculate with very numerous sensoria. Fig. 270. Ill 

 0.5s mm ; IV 0.3 mm ; V 0.425 mm ; VI 0.225 mm. Total anten- 

 nal length about 1.85 mm. Beak about 2.3 mm extending some- 

 times beyond caudal tip of abdomen. Prothorax and thorax black, 

 slightly pulverulent. Wing 4.2 mm long. M and branches of 

 M all very slender and delicate ; the other three veins are very 

 dark and heavy, stigma dense and dark. (Figs. 300 and 301) 

 Legs with yellowish brown femora; tibise yellow at base, rest 

 black; tarsi black, first joint elongate and subequal (at longest 

 dimension) to half the second. Fig. 271. Abdomen black and 

 slightly pulverulent, cornicles black and tuberculate. This form 

 in life has a humpbacked appearance due to large thorax and 

 relatively slender curving abdomen with convex dorsum and 

 concave venter. 



Fig. 269. L. curvipes. Antenna of male, showing relative length of 

 joints. 



