1916.] 189 



the pale iiervures prominent ; the gTouud-colour is greyish red and the 

 terminal area is grey. It is interesting to note in connection with this 

 appearance of so many ab. lineago from forced larvae, that in 1914, a 

 dry and warm season, I caught 3 wild true ab. lineago, all males, and 

 another, a ? , was brought to me to identify. These are the only wild 

 British examples I have seen. 



Ova from ab. intermedia have produced equal quantities of the 

 parent form and ocellaris Bkh. ; in 1910 a few ab. gilvescens were pro- 

 duced (Ent. Mo. Mag., XXII, 2nd Series, p. 204), the proportion 

 being, I believe, 3:3:1, the last figure representing ab. gilvescens. 

 Abs. lineago and gilvescens have not as yet been bred from. Single ? 

 examples of each were taken for the first time in 1914. 



31, Agate Road, 



Hammersmith, W. : 



March, 1915. 



HELP-NOTES TOWARDS THE DETERMINATION OF BRITISH 



TENTHBEDINIDAE, &c. (34).* 



BY THE REV. F. D. MOEICE, M.A., F.E.S. 



In the list of British genera of Saw-flies given in No. 3 of these 

 papers (Ent. Mo. Mag., May, 1903) the names, as explained at the 

 time, were those employed at that date by Konow, and represented 

 what was then the latest and most generall)^ accepted nomenclature 

 of the Sub-Order. But in the twelve years which have since elapsed 

 much fresli work has been done by Konow himself and by other 

 authors towards a revision of that nomenclature — especially by 

 Mr. Eohwer of the U. S. A. Department of Agriculture, and Dr. E. 

 Euslin of Fiirth (Bavaria). Certain of Konow's views, also, as to 

 the classification of the group have been generally abandoned, so that 

 neither as to its arrangement, nor as to the names included in it, can 

 my 1903 List claim any longer to be completely "up to date." Lastly, 

 in collaboration with Mr. Durrant of the British Museum of Natural 

 History, I have myself published in Trans. Ent. Soc. Lond., 1914 

 (Parts III-IV) certain further researches into the nomenclature of 

 particular genera, which in part confirm and in part conflict with the 

 conclusions reached by the authors above mentioned. 



* No. 33 wan issued in Ent. Mo. Mag., Vol. L,, pp. 207-212 (October, 1914). 



