294 THE ENTOMOLOGIST. 



and 30th, and August 8th. The last-named specimen was very 

 small, as it attained no more than 3'I'5 mm. in length and no 

 more than 43'5 mm. in expanse. 



(2) Agrion puella was not met with until May 23rd, when 

 some mature males were taken. The period occupied by the 

 emergence of the various individuals was an unusually pro- 

 tracted one, swarms of immature examples occurring at some of 

 the ponds as late as May 30th, and the species was still emerg- 

 ing on July 4th. On July 18th quite a remarkable series of 

 melanic males was obtained from one small pond ; the addi- 

 tional black spots were mostly irregular in shape and position, 

 and the different specimens varied in the amount of melanism 

 exhibited. A male was taken in another part of the Forest with 

 the moth Tortrix viridana in its clutches : we made an identical 

 observation on June 28th, 1908. Again on July 18th a female 

 had her abdomen thickly encrusted with mud, and it was inferred 

 that she had been ovipositing in wet clay. On August 29th a 

 female was obtained with the green ground-colour becoming 

 blue ; the blue was strongly marked at the wing-bases and on 

 segments 1 and 2. Females with cuneiform green or blue spots 

 on segments 3 to 6 were taken on May 23rd, July 4th and 18th, 

 and August 22nd. A solitary male, in tine condition, was obtained 

 as late as September 12th : this date is eleven days later than 

 our previous latest date for the species (September 1st, 1903). 



(3) Ischnura elegans. — ^Vhen the species was first met with 

 (May 23rd), it was already in mature condition, but an immature 

 male occurred as late as August 4th. The female form called 

 rufcsccns was taken on July 4th, and the form distinguished as 

 injuscans on July 4th and September 5th. The female having 

 segment 8 coloured as in infuscans, but having the humeral 

 stripes on the thorax obsolete, was obtained on August 4th. 



(4) Cordulia cenea. — The earliest capture was made on May 

 23rd, when the specimens come across showed a strong dis- 

 position to fly about the tree-tops. The species remained on 

 the wing an unusually long time, and males were taken on 

 July 18th, and another was observed in flight as late as 

 August 4th. Females were, as usual, seldom seen, and only 

 one capture could be effected (June 13th). The total length of 

 this example was 48-5 mm., and the alar expanse 68*5 mm. 



(5) Libellula depressa. — The flight of this dragonfly was 

 observed to extend from May 23rd to August 4th. 



(6) Brachytron hafniense { = pratense). — An evacuated nymph- 

 skin, referred to this species, was obtained on May 23rd. The 

 first imago was taken on May 30th, when as many as five 

 specimens were seen. The insect was taken again on June 13th. 

 An examination of several fresh specimens caught during the 

 year showed that the current description of the colours of 

 B. hafniense needs amendment or amplification in these re- 



