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swift-flying Brachytron pratense were on the wing, generally 

 well out of reach ; but two or three, including at least one 

 female, were secured, Mr. Tarbat making the first successful 

 stroke. A few Cordulia ccnea were hawking backwards and 

 forwards along the canal, close to the margin, unless a net 

 was near, when a bold sweep out of the usual course as a 

 rule occurred. More than one, however, were outwitted in 

 the end. Libellula quadrimaculata, though seen, was not 

 captured. While most were giving their attention to the 

 living insects, Mr. Clark was seeking for the empty nymph 

 cases, and obtained material about which we shall see and 

 hear more perhaps in connection with his forthcoming 

 demonstration. A few Neuroptera belonging to other 

 divisions were noticed. The common May-fly, Ephemera 

 vidgata, was indulging in its airy dances in the sun, and as 

 dusk came on a few examples of a much smaller species 

 were seen. The alder fly (Sialis lutaria) was common, and 

 a couple of specimens, one living, the other dead, of Phry- 

 ganea grandis, and one of Limuophilus rhombicus, were 

 found. Amongst the less easily distinguished species were 

 a few specimens of a yellowish-brown Trichopteron, Molanna 

 angustata I believe, while very common on the herbage 

 along the margin of the canal was another, a black one, 

 whose name, with those of one or more other Trichoptera, 

 were not determined. 



" A single specimen of Ranatra linearis, a water-bug, and 

 resembling a piece of broken grass-stem about four inches 

 long, was noticed by Mr. Clark. It was not, as is usually 

 the case, crawling on the mud, but was swimming near the 

 surface of the water. It was sent to our curator, Mr. West, 

 and by this time, no doubt, adorns his cabinet. Many 

 other aquatic bugs were " measuring " the surface o*" the 

 water, but there was not one of the party who could identify 

 them. Consequently they were passed over, as were also 

 the Coleoptera, Hymenoptera, Diptera, etc., for a similar 

 reason. 



" Byfleet Canal is noted for the large number of species of 

 the Mollusca it contains, and on several occasions I have 

 tested its capabilities in that connection, but our party on 

 the ioth seemed to be too fully occupied to attend to them. 

 Mr. Sich, however, found Succinea putris on the herbage. I 

 have taken what I consider Succinea. elegans from the same 

 locality ; perhaps one or other of us has mistaken the 

 species. Mr. Sich also paid some attention to the flora of 

 the district. He found, Impatiens fulva, the new beautiful 



