Cockerell — Insects in Burmese Amber. 



137 



abdomen short. Venation of anterior wings : stigma with its 

 lower side nearly straight, not bulging; radial sector forked 

 below basal half of stigma; media with stem (after leaving 

 radial sector) nearly straight, and with two forks as, usual in 

 related forms ; fork of cubitus with the lower branch well- 

 developed though short, directed downward to the margin. 

 Hind wings with a cubital fork 



the hind wings on the two sides 



Fig. 



£l«K leg. 



Fig. 2. Psyllix>socus banksi. A, anterior wing ; B, anterior leg. 

 Fig. 3. 



Fig. 3. Psyllipsocus banksi. C, hind wings of both sides ; D, antenna. 



have very different venation, as shown in the figures, one hav- 

 ing a closed cell absent from the other. The following; 

 measurements are in microns: length, about 1600; length of 

 anterior wing about 1840 ; width of anterior wing 720 ; length 

 of anterior, tarsus about 320; hind femur about 370 ; hind tibia 

 670 ; hind tarsus 465 ; length of stigma 340. 



This minute insect could not be identified with any genus 

 described from European amber or in the modern fauna in the 

 scanty literature on Psocidse at my command, so I sent a sketch 

 to Mr. Nathan Banks, asking his advice. This he very kindly 

 gives as follows : " The Fsocid you figure must be close to 



