258 British Dragouflics. 



markings, notably a mid-dorsal longitudinal streak. 

 Wing-cases long and straight, about 5mm. in length. 

 Legs rather long ; fore- about 7mm., mid- 8mni., hind- 

 iimm. ; paler than the general ground-colour; on the 

 femora two dark rings, on the tibije one rather faint one. 

 Abdomen tapering posteriori}', the segments being fairly 

 equal in length ; each, except the tenth, bearing along 

 its posterior margin a row of small white dots ; a whitish 

 lateral line along each segment, especially in older 

 specimens ; a mid-dorsal pale line, having on each side 

 of it a black dot in each segment except the tenth ; 

 distal margin of tenth segment surrounded with small 

 points ; between the dorsal and each of the lateral 

 lamellae a small conical projection. Caudal lanielles 

 5"5mm. in length ; a sharp point at the extremity, and 

 a strong median rib ; in colour pale, much blotched 

 with brown, and spotted with still darker brown. [Bred 

 on several occasions from Surrey nymphs.] This n}-mph 

 is fond of hiding under or between dead sunken leaves, 

 where its colour protects it remarkably well. 



Emergence of Imago. 



On page 112 will be found a description of the 

 emergence of an Anisopterid Dragonfly ; that \\hich 

 follows gives the method of disclosure of P. nyniphnla, 

 which appears to be sufficiently typical of the Zygopterids. 

 On April 27, 1898, about i p.m., a nymph was noticed 

 attempting to crawl up the edge of a dish, in which it 

 had been placed some time before. When removed to 

 another vessel and put in such a jjosition that it could 

 easily crawl up a stick, it did so in a very few minutes. 

 By about 1.30 the imago had commenced to emerge. By 



