294 THE ENTOMOLOGIST. 
and 30th, and August 8th. The last-named specimen was very 
small, as it attained no more than 82°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 Vortrix 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 fine 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.—When 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 
rufescens was taken on July 4th, and the form distinguished as 
infuscans on July 4th and September 5th. The female having 
segment 8 coloured as in infuscans, but haying the humeral 
stripes on the thorax obsolete, was obtained on August 4th. 
(4) Cordulia enea.—The earliest capture was made on May 
23rd, when the specimens come across showed a strong dis- 
position to fly about the tree-tops. ‘he 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 18th). 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 28rd to August 4th. 
(6) Brachytron hafniense (= pratense).—An evacuated nymph- 
skin, referred to this species, was obtained on May 28rd. ‘Ihe 
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- 
