40 [February, 



loose screen cover. It must be rough inside, so that the nymphs can 

 crawl up its sides. It should be half filled with water, the nymphs 

 put in, and some trash with them for them to cling to, the cover 

 added, and the whole set in a place where it will not get overheated 

 and yet will receive the direct rays of the morning sun. Conditions 

 will be less natural in such a cage as this, but if only nymphs which 

 are well grown and require little or no food are put into it, it will be 

 found entirely satisfactory. 



A very satisfactory way to rear some of the smallest and most 

 delicate species of dragon-flies and may-flies, species requiring well 

 aerated water, is to place the nymphs in shallow, flaring dishes of 

 unglazed pottery before an open screened window in one's room. The 

 water will need to be renewed daily or oftener, because of the rapid 

 evaporation, but it will keep very sweet; and the images emerging 

 will go at once to the screen and stay there, and the danger of their 

 falling into the water before maturing and dying is obviated. 



TENTHEEDOPSIS THORNLEYI, Konow, A NEW SAW-FLY 

 (BRITISH). 



THE BY REV. F. D. MOBICE, M.A., P.L.S. 



Among a number of Tenthredinidce which the Rev. A. Thornley, 

 of South Leverton (near Lincoln), has from time to time sent to me 

 for determination, both sexes have more than once occurred of a 

 Tenthredopsis which I was unable to identify. A year or more ago I 

 sent a pair of them to Pastor Konow, and he was inclined to think 

 them new, but required more material before pronouncing positively. 

 This I have supplied to him from later " sendings " of Mr. Thornley ; 

 and he has now published in Karsch's Entomologische Nachrichten, 

 1899, p. 362, a full description of Tenthredopsis Thornleyi, n. sp. 



Mr. A. A. Dalglish has sent me the same insect from the neigh- 

 bourhood of Glasgow ; Mr. Thornley's specimens are from his own 

 district ; and Herr Konow records it also from Ulm, in South 

 Germany. 



Tenthredopsis Thornleyi, Konow, is a very darkly coloured and rather small 

 species (long., 9 — 10 mill.). It seems to resemble a good deal that described by 

 Mr. Cameron in his Monograph as tristis, Steph., but the latter is said to have a 

 yellow line on the pronotum, and also on the basal segment of the abdomen, white 

 trochanters, and fuscous hinder tarsi, whereas in Thornleyi the protiotum and basal 

 segment of the abdomen seem to be always quite black, the troclianters whitish-, but 

 black-spotted, and the tarsi rather conspicuously ringed with white before the apex 



