A (^yion. 



1S7 



Antcnim seven-jointed, the distal one being ver)- small, 

 basal two stout, others slender ; second dark basally. 

 Mask flattish, triangular, narrow at hinge ; middle lobe 

 produced in an obtuse angle, and lightly toothed ; palpi 

 with a row of teeth along the distal edge, the inner one 

 being rather larger than the rest ; the sharp, slender 



Fig. 50. — Nymph uf Agrion puella. 

 (X 3.) 



outer movable hooks interlacing when the mask is at 

 rest ; mask extending to the insertion of the fore-legs ; 

 a row of hairs near the outer margin of the palpi, and 

 an interrupted half-circle on the body of the mask. 

 Eyes rather dark olive-brown, large, somewhat elliptical 



