NATURAL HISTORY SOCIETY OF GLASGOW. 311 



As I have mentioned the Ahietum group, 1 may state here that 

 Nematus ahietum, Hartig, is British, although it has not been 

 previously recorded. I captured it in the Black Wood of Rannoch, 

 in June. It is a very variable species; not one of the few specimens 

 I have examined being exactly alike in colour, N. abietinus, 

 hospes, and limbatus o^ Dsdilbom. (1835), JV. Saxeseni and compressus 

 of Hartig (1837), are merely aberrations of it. Dahlbom described 

 it two years before Hartig; and his name of abietinus ought 

 therefore to be adopted in preference to that of Hartig, in accord- 

 ance with the law of priority, unless, indeed, the prior name of 

 pini, given to it by Retzius (De Geer, Mem. iii., 266, pi. 38, 

 f. 5-7) be inadmissible, through it being, when Retzius applied 

 it to the present species, already in use for another, namely, for 

 the Tenthredo pini of Linne. 



Nematus dimidiatus. 



In the first volume of the Entomological Magazine, pi. 1, f. 1, 

 Messrs Doubleday and Newman described and figured an orange 

 larva, with black lateral spots, found by them feeding on the 

 poplar, and which they referred to the Nematus dimidiatus, Saint 

 Fargeau (Mon. Tenth,, 68, 265). This figure has, until lately, 

 greatly puzzled me, not being able to refer it to any true 

 Nematus species, whose earlier stages had been described ; nor 

 could I make out what the N. dimidiatus might be, as the descrip- 

 tion is very ambiguous. Knowing that the Rev. T. A. Marshall 

 had a number of saw-flies named by the late J. F. Stephens (by 

 whom, no doubt, Mr Doubleday's insect had been named), I asked 

 him to favour me with a look at a specimen of dimidiatus. This 

 he very kindly did; but it did not throw very much light on the 

 subject, as it seemed to be merely a variety of the common goose- 

 berry pest, Nematus ribesii. However, the other day, on again 

 examining the figure, it assumed a more familiar aspect, and 

 I soon recognised it as that of Gladius viminalis, Fallen. 



Nematus pallipes, Fallen. 



I have two specimens of what appear to be this species, taken 

 by Drs Sharp and White, at Braemar, which differ from the usual 

 form in having the collar devoid of testaceous, and quite black, 

 but otherwise resembling the type closely enough. 



Nematus carinatus, Htg,, is clearly different from palli2:)es, as may 

 be easily seen by comparing the lengths given of their respective 



