DEAGONFLIES IN 1897. 283 



canal, near Byfleet ; Wisley Pond ; Booliham Common ; near 

 Newark Abbey ; near Brockenhurst. A. cyathigerum was on the 

 wing still longer than A. imella, for the first was seen on May 

 16th, and the last on Sept. 26th, the localities being Black Pond, 

 very common ; canal, near Byfleet ; Bookham Common ; New 

 Forest. Charpentier * figures the female blue ; but, though I 

 have taken several blue females, most are greenish in ground 

 colour. The spot on the second segment of the male, which 

 is usually elliptical, has not seldom a point anteriorly, and 

 in one case was reduced to a thin transverse streak detached 

 from the circlet as the spot often is when normal in shape. 

 A. pidchellum was fairly common in one restricted spot by the 

 side of the canal, near Byfleet, on June 7th and July 11th. 

 On Aug. 3rd I found A. mercuriale fairly common along one 

 of the streams in the New Forest. In several cases they were 

 flying in pairs, but the majority were males. A few days later 

 I saw no females at all. On the wing this insect closely 

 resembles A. puella, A. cyathigerum, or A. pidchellum, but it is 

 decidedly smaller (see Plate, fig. 1). The males of this species 

 may be at once recognised by the very distinctive mark on the 

 second segment, an enlarged drawing of which is shown in 

 the figure. The females are dark, like those of A. puella or 

 A. cyathigerum. 



Between May 2nd and Aug. 5th, Pyrrhosoma minium was met 

 with in a number of localities — Black Pond ; Longcross, near 

 Chertsey ; canal, near Byfleet ; near Newark Abbey ; and one 

 or two places in the New Forest. Specimens with a bunch of 

 acari attached to the under surface of the thorax were taken at 

 Longcross. P. tenellum was as usual later than its congener. It 

 was on the wing from June 13th till Sept. 11th, and was noticed 

 at the Black Pond in large numbers, and in a few localities in 

 the New Forest. 



Erythromma najas, a very local dragonfly, swarmed in a some- 

 what restricted locality at the canal, near Byfleet, on June 7th. 

 Some were taken at Wisley Pond on June 23rd, and, strange to 

 say, a single specimen, a male, was taken at rest on the evening 

 of June 17th at the Black Pond, this making yet another new 

 record for that prolific locality. 



21, Knight's Park, Oct. 19th, 1897. 



* 'Libellulmse europseae,' pi. 42, fig. 1. 



