Insects in Great Britain. 
617 
the labellum. All the flowers of one raceme twist so as to face nearly in one 
direction. The only visitor seen, adhered to the pollinia, but did not pull 
them out. 
Visitors . Hymenoptera. Petiolata parasitica: Chalcididae : (1) One sp., 
seeking h. 5. VII. 96, 800 ft. 
Class AB, § 44. Oxalts Type. 
186. Oxalis Acetosella, Linn. [Lit. Brit. 23 . 29 ; N.C.E. 1 , 11 , 18 , 34 , 
40 ; Alps 2.] In 96 per cent, of the flowers examined the stigmas and 
stamens were remote from one another, but in 4 per cent they were near 
enough to make self-pollination by contact possible. 
Visitors . Lepidoptera. Heterocera : Tineidae : (1) 1 sp., sh. 15. VI. 99, 
1,900 ft. Diptera. Empidae : (2) Empis lucida Ztk, sh. 12-15. VI. 99, 20-2,200 ft. 
(3) Empis sp., sh. 20. V. 97, 1,200 ft. Bibionidae\ (4) Scatopse sp., sh. 12. VI. 99, 
1,700 ft. Anthomyiidae : (5) Hylemyia nigrescens Rnd., sh. 12. VI. 99, 2,500 ft. 
(6) Anthomyia sp. sh. 23. V. 96; 20-21. V. 97, 12-2,600 ft. 
187. Linum catharticum, Linn. [Lit. Brit. 23 ; N.C.E. 1 , 14 , 16 , 
Warnstorf 250 / ; Pyren. 17 .] The flowers remain closed in bad weather. 
Visitors. Lepidoptera. Rhopalocera : (1) Coenonympha pamphilus L., 4. VII. 
94, about 2,000 ft. Diptera. Tachinidae : (2) Siphona geniculata Deg., sh. 22. VI. 
95, 800 ft. Anthomyiidae'. (3) 1 sp., 10. VII. 96, 2,200 ft. 
Class AB, § 45. Small Ribes Type. 
188. Ribes Grossularia, Linn. [Lit. Brit. 29 , Marquand 1513 ; 
N.C.E. 1, 3 a, 21 b, 33 , 34 , 40 .] In cultivation and as an escape from it. 
Visitors. Hymenoptera. Aculeata : Apidae: (1) Apis mellifica L., sh. 18-22. 
V. 97; 7-16. V. 98, 7-800 ft. (2) Bombus terrestris L., sh. 19. V. 97, 8-900 ft. 
(3) B. lapponicus F., 20. V. 97, 800 ft. Vespidae : (4) Vespa ? sylvestris Scop., 20. 
V. 97, 800 ft. Diptera. Empidae'. (5) Empis lucida Ztt., sh. 13. V. 98, 800 ft. 
Bibionidae : (6) Dilophus sp., sh. and fp. 19-22. V. 97, 800 ft. Muscidae : (7) Lucilia 
cornicina F., 18. V. 97, 800 ft. (8) Pollenia vespillo F., sh. 7. V. 98, 800 ft. 
Anthomyiidae'. (9) Anthomyia sulciventris Ztt., fp. 22. V. 97, 800 ft. Hemiptera. 
(10) Anthocoris sp., sh. 19. V. 97, 800 ft. 
189. Ribes rubrum, Linn. [Lit. N.C.E. 1 , 3 a, 16 , 40 ; Alps 34 .] In 
cultivation and as an escape from it. 
Visitors. Diptera. Mycetophilidae : (1) Sciara sp., sh. 20. V. 97. Chirono- 
midae: (2) Diamesa ? tonsa Hal., sh. 13. V. 98. (3) 1 sp., sh. 20. V. 97. Muscidae : 
(4) Lucilia cornicina F., sh. 18. V. 97. Anthomyiidae'. (5) Anthomyia sulciventris 
Ztt., sh. and fp. 24. V. 97 ; 13. V. 98. Thysanoptera. (6) Thrips sp., 18. V. 97. 
All at 800 ft. 
