owe 
NOTES ON BRITISH THYSANOPTERA. 943 
Aulax glechome, L.—Very rare. Horden, Durham. Fleshy 
reddish swellings on Glechoma hederacea. 
Aulax hypocheridis, Kieff.—Somewhat irregular swellings on 
Hypocheris radicata. Very rare, on plants growing on an old 
slag heap, Birtley. 
Aulacidea piloselle, Kieffer.—On midrib of leaf of Hieraciwm 
pilosella. Sparingly throughout North Durham. New to Britain. 
Taken by both Mr. Bagnall and myself. 
Aulacidea hieracii, “Bouche. —Spherical or top-shaped swell- 
ings on Heeraciwm boreale, an enormously abundant plant in 
North Durham and South Northumberland—and the gall is just 
as plentiful. 
BIOLOGICAL AND SYSTEMATIC NOTES ON BRITISH 
THYSANOPTERA. 
By C. B. Winns, M.A., FES. 
(The John Innes Horticultural Institution, Merton, Surrey, England.) 
(Continued from page 227.) 
Sericothrips, spp. ? 
1836. Sericothrips staphylinus, Burmeister, Handb. d. Entomo- 
logie, 11, p. 413. 
1848. * . Amyot et Serville, Ins. Hémi- 
pteres, p. 641. 
1878-9. s : Reuter, Diag. ofv. nya Thysan-. 
opt. f. Finland, p. 11. 
1899. i 5 Reuter, Acta Soc. p. Fauna 
Fennica, xvii, p. 40. 
In the above references there is nothing to show which 
species of this genus was found. They should, therefore, be 
kept apart until specimens can be obtained from the countries 
in question. No useful purpose is served by confusing the 
problems of distribution by inaccurate identification of old 
descriptions and records. 
Heliothrips errans, sp. nov. 
Female (macropterous).— Measurements. — Total length about 
14 mm., head length 0:140 mm., width 0:220 mm.; prothorax 
length 0-144 mm., width 0: 260 mm.; pterothorax greatest length 
0:350 mm., width 0-370 mm. - abdomen length about 0-95 mm., 
width 0°37 mm.; wing length 0:95 mim., width 0:060 mm. 
Antenne: Segment . 1 2 38 4 5 °° 6 7 8 
Length (u«). 2 ? 74 64 58 35 9 44 
Width (x). ” 37 25 24 22 22 9 46 
Total length of antennw 0:32 mm. 
