16 



( January, 



rippled. A fair number of small May-flies were about, the bodies of the flies being 

 about half an inch long, and marked alternately with black and yellow bands, the 

 wings were the ordinary green of the " green drakes," a few of the flies were with 

 pale greenish bodies and colourless wings. I imagine these were the final flies of 

 the previous mentioned " green drakes." 



As I lay with my head over the boat side one of the " green drakes " settled 

 on the side of the boat just below me ; it carefully turned head downwards and 

 crawled down towards the water; when it reached the water it with difficulty 

 forced one front " foot " and then the other through the surface film, its head 

 followed and the next pair of legs, but when the bases of the wings were reached, 

 and the fly progressed, the wings became bent downwards and outwai'ds until they 

 closely enveloped the abdomen ; the fly now moved more quickly until finally the 

 two tail filaments became joined as the insect drew them under. Beneath the 

 water the fly looked much like its own larva. After this I saw eight or nine other 

 of these May-flies behave in the same way, all of which were the green drakes ex- 

 cepting one, but the latter were not so abundant as the former. Tlie flies all crawled 

 out of sight as they travelled round towards the keel of tlie boat. I would suggest 

 that tlie enveloping wings retained air for respiration under water. — Frank Slade, 

 The Horniman Museum, Forest Hill, S.E. : December 1th, 1903. 



[Mr. Slade's note " On May-flies re-entering the water" probably concerns a 

 species of the Ecdyunis assemblage of genera, regard being had to the date, the 

 size of the fly, the colour of its wings (subimago and imago), and the number (two) 

 of its setse. The habit noted has hitlierto been observed only in May-flies of small 

 stature, such as species of Baetis and its allies. — A. E. Eaton, Woodlands, Seaton 

 Devon : December 9th, 1903]. 



Corizus hyalinus at Norwich. — On October 3rd last I captured a Corizus wliich 

 was sunning itself on the Cemetery wall at Norwich. The insect, which was quite 

 unknown to me, has subsequently been identified by Mr. Edward Saunders as 

 Corizus hyalinus, a species recently described by him as British on the strength of 

 a specimen captured during the past season in Essex (Ent. Mo. Mag., xiv, 294). 

 It is interesting that both captures should be from the liastern Counties. — II. J, 

 Thouless, Corfe College Road, Norwich : December 9th, 1903. 



Oxycera dives, Lw., at Aherfoyle, Perthshire. — I have to record the capture at 

 Aberfoyle last July of three specimens of this rare Stratiomyid, a species which is 

 placed "in italics" in Mr. Verrall's List of Britisii Diptera. In the Enl. Mo. 

 Mag., vol. xxxiv, p. 88, Mr. C. W. Dale states that a sijigle example was taken at 

 Rannoch in June, 1896, and that there is another in the collection of the Ento- 

 mological Club. I do not know of any other record. My specimens were taken on 

 the hills at Aberfoyle, near the waterfall known as Rob Roy's Leap, one on the 6th, 

 one on tlie 8th, and one on the 9th July, 1903, at rest on bracken in sheltered spots. 

 They are in good condition, and I should think had only recently emerged. Thinking 

 I had found something good, I looked carefully for more, but without success, and 

 the wet weather soon put a stop to collecting during the remaining days of my 

 visit. Mr. Percy 11. Grimshaw has seen two of them, and says that they belong 

 to this species.— A. E. J. Carter, 4, West Holmes Gardens, Musselburgh, N. R. : 

 December 1th, 1903. 



