FIELD NOTES ON BRITISH SAWFLIES. 49 



shire (whence T.fagi is recorded in E. M. M. 1912, p. 159). It 

 is always rare and of single occurrence in the Bentley Woods, 

 near Ipswich, and Wilverly Inclosure, near Brockenhurst. T. 

 temula is a very common species in Isle of Wight, New Forest, 

 Northants, Lines, and Suffolk, not infrequently flitting about 

 the undergrowth of the garden plantations at Monk Soham ; it 

 seems nearly confined to the middle of June. T. mesomda is 

 hardly rarer, and is almost invariably taken on umbelliferous 

 flower-heads ; I have noted it in the counties given under the 

 last species, and Dr. Cassal has found it at Ashby, near Don- 

 caster. Its active span extends to July 20th, when males 

 occurred to me on Heracleum sphondylium on the Southwold 

 cliffs in 1901. Of T. olivacea, I possess only a pair, taken by 

 Chitty at Loch Awe during May, 1893. T. atra, with its var. 

 dispar, is not a very common kind in my experience, and is as 

 often found in August as June, oftener in marshes than in woods ; 

 Rockland Broad and Eaton in Norfolk, Bentley and Foxhall in 

 Suffolk, Market Easeu in Lines, Brockenhurst, and Carramore 

 Lake at Louisburgh in Mayo ; and, with it, I once swept T. moni- 

 liata in the Rockland marshes. T. livida occurs everywhere, and 

 both sexes vary a good deal in the extent of their rufescent 

 coloration. It is abroad at the end of May, and extends at Monk 

 Soham to Aug. 26th ; Totham in Essex (Prof. Image), Bristol 

 (Charbonnier), Byfleet (Sich), Hereford (Gorham), Sutton in 

 Surrey (Campbell- Taylor), Stradbally in June, 1907 (Andrews), 

 Cannock Chase in June, 1904 (Tomlin), the New Forest, and 

 Northants. My solitary T.fagi is a female, from the Bentley 

 Woods, near Ipswich, on June 15th, 1895 ; my solitary T. velox 

 was beaten from hazel at the same place on Aug. 16th, 1904 ; 

 and a couple of T. colon were taken at Matlock early in Jul}', 

 1900, and at Cannock Chase on June 8th, 1904, by Tomlin. 

 T.ferruginea is by no means common ; Baylis and I took a pair 

 about Ipswich in 1894 ; Bradley has given me a female he took 

 at Sutton, near Birmingham, in June, 1899 ; and Rev. W. F. 

 Johnson captured another at Achill Sound, on the coast of Mayo, 

 in June, 1911, along with a female 2\ balteata, which species I 

 have only met with in the Wilverly Inclosure of the New Forest, 

 where it would not appear to be rare. 



Tenthredopsis is treated of at the end of the present group on 

 account of the difficulty attached to the determination of its 

 species, between which there frequently exists a somewhat in- 

 tangible distinction. The typical form of T. litterata is not very 

 common in June ; Wainwright has taken it in Wyre Forest, and 

 I have noted it at Betchworth in Surrey, Wilverly and Matley 

 Bog in the New Forest, Brandon in Suffolk, Mablethorpe and 

 Market Rasen in Lines. All its varieties are rarer, and I have 

 only seen var. cordata from Ipswich on June 3rd, 1901, and 

 Point of Aire, in Fhntshire, on June 17th, 1904 (Tomlin) ; var. 



