APHID PESTS Of MAINE. 



169 



cornicles are varnished brown in color. The cauda is ringed at 

 base with black. This collection (47-09) was made June 30, 

 1909. The empty shells of the winter eggs from which they 

 had hatched were still attached to the needles of the Scotch 

 Pine. (P. sylvestris). 



The newly dropped nymph is bright pale yellow on head and 

 thorax and brownish yellow on abdomen. Antennje and legs 

 are pellucid white with yellow joints. 



Alate viviparous female. This form was collected June 30, 

 1909, and June 20, 1910. In coloration they resemble the 

 apterous form. The wings are shown in Figs. 304 and 305. 

 The pulverulent dorso-mesal area is whiter and often appears 

 as transverse bands of white. The antennal measurements are 

 I, 0.1 mm; II, o.i mm; III, 0.55 mm; IV, 0.3 mm; V, 0.35 mm; 

 VI, 0.225 mm. Ill has about 7 sensoria in a row. IV, i 

 sensorium, V, i besides the usual distal one. Fig. 285. 



Fig. 285. L. pini. Antenna of alate viviparous female. 



Essigella californicus Essig. An alert linear little species 

 was taken from Pinus strobus June 30, 1909, at Stillwater, 

 Maine (46-09). Mr. Essig's description of californicus which 

 was received about that time showed so many resemblances to 

 the Maine collection that Mr. Essig kindly sent me a good col- 

 lection from California. The Maine material accords with that 

 sent me from California. 



Fig. 286. B. californicus. Beak. 



Winged viviparotis form. Only one individual of this sort 

 was obtained. Head light greenish brown with I and II of 

 antennae concolorous. Ill, IV, and V were each pale at proxi- 

 mal and dark at distal part. The antenna with but five joints 

 and as figured by Essig. Eyes very red. Beak extends to 

 caudal edge of dark brown heart-shaped plate of ventral thorax. 

 Prothorax light greenish brown. Thorax green with lobes 

 brown, and ventral plate dark brown, heart-shaped. Abdomen 



