RECORDS OF SOME NEW BRITISH PLANT-GALLS. 199 
Perrisia lathyrt, Kieff., and Perrisia lathyricola, Rubs. (not of 
Swanton’s Cat.). 
On meadow vetchling, not uncommon, 1915-16. 
Perrisia alni, F. Loew. 
Swollen veins, alder leaf. 
NortHUMBERLAND, Ninebanks, one leat one De \iaiaelal 
Perrisia cirsti, Rubs. 
Head of thistle (Cirsium arvense), larve red. 
NortHuMBERLAND, Ovingham and Blanchland, R.S.B., Ninebanks, 
Rev. J. E. Hull. Duruam, Birtley, J.W.H.H., Gibside, Staindrop, 
Washington, Penshaw, and Cox Green. lLancasuire, Ainsdale, Fresh- 
field, and Lathom. Cuexsuirz, Bidston, R.S.B. 
There is what I believe to be a second species, with yellowish to 
orange larve, though they may be a young form of cirsii, R.S.B. 
Perrisia sp. 
Head of Cirsium arvense closed, a few petals to one side only break- 
ing out; larva solitary, deep vermilion to crimson. 
Duruam, Penshaw, Fatfield, Gibside, R.S.B. NorraumBERuann, 
Ninebanks, J.W.H.H. 
Perrisia compositarum, Kieff. 
Spear-plumed thistle (C. lanceolata), affecting ovary and style; 
larvee reddish-orange to red, gregarious. 
Duruam, Gibside. Lancasnire, Lathom, R.S.B. NorraumBeRLanD, 
Ninebanks, J.W.H.H. 
Perrisia sp. 
Also on C. lanceolata, heads often bent or twisted, remaining closed, 
or not opening fully; florets apparently normal; larvee white to 
yellowish. 
Same localities as above; and CumserLanp, near Nenthead, B.S.B. 
Perrisia flosculorum, Kieff. 
Red clover, flower closed, containing rose-coloured larva. 
Dura, in a field behind my house at Penshaw, R.S.B. 
Perrista sp. 
Heads of black knapweed (Centaurea niyra), swollen, breaking round 
edges, larve in large numbers, yellowish to pink. 
Duruam, Fatfield, Penshaw, Gibside, and near Staindrop, R.S.B. 
CHESHIRE, Bidston Hill, R.S.B. 
Perrisia mikii, Kieff. 
Heads of black knapweed, remaining small. 
Duruam, Fatfield, J.W.H.H., Gibside, R.S.B. 
Perrisia engstfeldii, Riibs. 
Meadow-sweet, yellowish- -green blister on upper surface of leaf 
turning reddish, the single larva in corresponding concavity below. 
Duran, Winlaton Mill, Gibside, Fencehouses, near Chester-le- 
Street, Lamesley, and Lanchester, B.S. B.; fairly widespread but not 
