88 MAINE AGRICU1,TURAL EXPERIMENT STATION. I913. 



Melanoxantherium salicis Linn. This black bodied aphid 

 with conspicuous white spots, brilHant cornicles and heavily 

 veined wings is a striking contrast to the allied but more sub- 

 dued species of this genus. 



Alate viviparous female. Head blackish; antenna (Fig. 43 E) 

 with I, II, III brown, others blackish. III with about 14 sen- 

 soria in irregular row, base and spur of VI subequal ; eyes 

 black; prothorax blackish with prominent lateral tubercle; 

 thorax with lobes all uniform black; wings with very heavy 

 black veins, anal vein heaviest ; legs with femora and tibiye 

 brown with points dark, tarsi black ; abdomen greenish or 

 brownish black with white median line composed of dots and 

 with 4 white spots cephalad the cornicles in a row bordered by 

 smaller ones and a large white spot at base cau^'ad of cornicle; 

 cornicles brilliant orange, long large bulging and with very little 

 flare at opening, about as in the apterous form. 



The young progeny of the alate viviparous females are dull 

 greenish with bright orange cornicles and white markings 

 arranged as in the parent. 



Apterous viviparous female. The antenna (Fig. 43 F) with 

 sensoria on III, but fewer than in the alate form. The corni- 

 cles are bright orange, long, large, bulging, constricted at tip 

 with a very slight flare. (Fig. 45 F). The lateral tubercles of 

 prothorax and abdomen are very large and conspicuous. In 

 Maine collections the number and arrangement of those on the 

 prothorax seem subject to variation. There is always one large 

 prominent one but one or two others may be present. (Fig. 

 44 D and 44 E). 



Collection data: 49-06. June 28, 1906. Alate viviparous 

 females and nymphs on Salix along branches more than 1-4 

 inch in diameter. 



8-08, Orono, June 16, 1908, on trunks and branches of Salix 

 in gregarious colonies. 



12-10. May 16, 1910. Gregarious along stem of Salix, 

 Orono. Apterous viviparous females just mature not yet with 

 progeny. Body black, cornicles bright orange. 



16-10. May 18, 1910. Nymphs. First instar with 4-jointed 

 antennae and beak reaching beyond tip of abdomen. Second 

 instar with 4-jointed antenna and beak extending beyond 3rd 

 coxa. Third instar with 5- jointed antenna. June 6, winged 



