44 British Dragouflics. 



AGRIONID^E. 



A. Middle caudal appendat,'e lamellar, laterals three- 



edged. 

 I. A raised plate on fore part of head bearing 

 the ocelli ; caudal appendages perhaps 

 proportionally shorter and more slender 



than in C. splendens virgo. 



II. More highly developed caudal appendages ; 



head somewhat pointed in front . . . . splendens. 



B. All caudal appendages lamellar, traversed by 



much-branched trachece. 

 I. Lamellae rounded at tip, spotted and 



banded ; antenna.' six-jointed . . . . naias. 



II. Laniellce pointed at tip ; antennae usually 

 seven-jointed. 



a. Lamella.' coloured. 



1. Lamellai mottled with brown; 

 body comparatively short and 



stout nympluila. 



2. Lamellae spotted, long ; eyes 



large pcnnipes. 



b. Lamella; hyaline, or nearly so, except 

 the trachea;. 



1. Lamellx' with one margin only 



hairy pumiLio. 



2. Lamella; with both margins 

 hairy. 



i. Several segments of 

 abdomen marked dorsally 

 with four dark, curved, 

 • longitudinal lines . . . . elegaiis. 



ii. Abdomen with a darker 

 longitudinal streak, 



thickest at the base of 

 the segments on each side 

 of medio-dorsal paler line piiclla. 



iii. Dorsal surface of abdo- 

 men with a central dark 

 patch on each segment 

 (except lo), containing 

 a pale, pear-shaped or 

 triangular one ; lamella; 

 rather broa<l, })ointed, a 

 thin black line across 

 the middle tvat/iigeruin. 



