90 British Dragonjiics. 



pterostigma, and the amount of saffron suffusion on the 

 wings, the differences in both of which seem usually to 

 be due to the age of the specimen. In the south of 

 Europe there is sometimes a tendency to decrease in 

 size, or suppression of, the black dorsal streak on seg- 

 ments 8 and 9, while the }'ellow on the inside of the 

 fore femora tends at the same time to remain in the 

 adult.-^ 



Elliptical in outline ; in fact, nearly circular. Minor 

 axis about half a millimetre, major axis a trifle greater. 

 Colour, after being kept in a solution of formalin for 

 about three weeks, }-ellowish, sometimes with a tinge 

 of brown. Contents, granular or oily. There did not 

 seem to be any pedicel. [The eggs, from which this 

 description was obtained, were a few extracted from the 

 dead body of a female caught near Sandwich in the 

 middle of August, 1898.] 



Nymph. 



Body of the usual sepia tint, broad and somewhat 

 flattened ; length, including anal appendages, 17mm. to 

 1 8mm. ; greatest breadth, 7mm. Head of moderate size, 

 in outline a flattened pentagon ; width 5'5mm. Aiitciuice 

 of seven joints, the basal two being short and rather 

 swollen, the rest more slender. Ufask tapering backward 

 to the joint which is situated between the insertion of the 

 fore- and mid-legs, narrow at joint, spoon-shaped, covering 

 the face ; palpi broad where they approach one another, 



* De Selys, " Revue des Odonates," p. 32. 



