Calopteryx. 225 



including" anal appendages, but not antennae, about 

 32mm. ; greatest breadth — at the meso-thorax — 4mm. 

 Head small, roughly pentagonal, with all the corners 

 rounded ; width about 4mm. AntcniKC 6"5mm. long ; 

 seven-jointed, basal joint stout and longer than other 

 six together ; six distal joints, slender and gradually- 

 decreasing in size to the seventh, which is very small 

 and pointed. I\Iask extending to the insertion of the 

 mid-legs ; ver}" narrow at the joint, but suddenly 

 expanding about half-wa}- to the tip; the palpi and 

 middle lobe closing up to form a spoon-shaped covering 

 to the face, and projecting as a blunt point in the 

 front of the head ; middle lobe deepl}- divided into 

 two long pieces, rounded at the end, and each bearing 

 one bristle some distance behind the end ; palpi long, 

 terminating in three sharp points, and having about 

 three bristles near the base of the long, sharp, movable 

 hook. Eyes small, and not conspicuous, situated at the 

 lateral corners of the head. Ocelli consjDicuous, pale. 

 Occiput of fair size, front- and hind-margins almost 

 straight, and nearly parallel. Prothorax rather large, 

 dark brown laterally, with a central, squarish pale 

 l)atch. Thorax dark brown, with a central pale patch 

 continuous with that on the prothorax. ]Vi)ig-cases 

 about 7mm. long, rounded at tip, costal margin rather 

 pale. I^'^'g^ long and slender, pale ; femora and 

 tibiai each with three brown rings, some being more 

 conspicuous than others ; length of fore-legs about 

 13mm., of mid-legs i8mm., of hind-legs i9-5mm. Abdo- 

 iiieii tapering gradually to the anal extremit)', brown, 

 lighter at the sutures, and along three lines — one mid- 

 dorsal and two lateral — the dorsal one bearing a dark 



