630 
Willis and Bur kill. — Flowers and 
228 . Salix Lapponum, Linn. [Lit. Arct. 34.] 
Visitors to male catkins. Hymenoptera, Aculeata : Apidae : (1) Bombus 
lapponicus F., sh. 24. V. 97, 2,800 ft. Vespidae : (2) Vespa norvegica F., 11. VI. 99, 
2,100 ft. Diptera. Myceiophilidae : (3) Sciara sp., 1 1. VI. 99, 2,100 ft. Chiro- 
nomidae : (4) 1 sp., 24. V. 97, 2,300 ft. Anthomyiidae : (5) Coenosia sp., fp. 24. V. 97 ; 
1 1. VI. 99, 2 1-2,300 ft. 
Visitor to female catkins. Diptera. Bibionidae : (1) Scalopse sp., 1 1. VI. 99, 
2,100 ft. 
229 . Salix repens. Linn. [Lit. N.C.E. 1, 14, 25, 33, 34.] 
Visitors to male catkins. Hymenoptera. Aculeata: Apidae: (1) Apis mellifica 
L., sh. 7. V. 98, 600 ft. (2) Bombus lapponicus F., sh. 22. V. 97, 700 ft. (3) B. 
terrestris L., 7. V. 98, 600 ft. Sessiliventres. Tenthredinidae : (4) Nematus fallax 
Lep., sh. 18. V. 97, 800 ft. Diptera. Syrphidae. (5) Platychirus discimanus Lw., 
sh. and fp. freq. 2 1-2 7. V. 97; 7. V. 98, 6-1,400 ft. (6) Syrphus punctulatus Verrall, 
sh. 22. V. 97, 700 ft. Empidae : (7) Empis borealis L., 20-22. V. 97, 7-1,400 ft.. 
(8) E. lucida Ztt., sh. 7. V. 98, 600 ft. (9 and 10) Empis spp., sh. and fp., 21. V. 97, 
1,400 ft. Muscidae : (n) Lucilia cornicina F., sh. 18. V. 97, 800 ft. (12) Pollenia 
vespillo F., sh. 7. V. 98, 6-700 ft. Anthomyiidae : (13) Anthomyia sulciventris Ztt., 
sh. and fp. 18-22. V. 97 ; 16. V. 98, 6-900 ft. (14 and 15) Anthomyia spp., sh. 
20-27. V. 97 ; 14-16. V. 98, 7-800 ft. 
Visitors to female catkins. Hymenoptera. Aculeata : Apidae : (1) Bombus 
lapponicus F., sh. 18-20. V. 97, 800 ft. (2) B. terrestris L., sh. 22. V. 97, 7. V. 98, 
700 ft. Diptera. Empidae : (3) Rhamphomyia cinerascens Mg., sh. 20. V. 97, 
8-900 ft. Muscidae : (4) Lucilia cornicina F., 7. V. 98, 700 ft. (5) Pollenia vespillo 
F., 20. V. 97, 900 ft. Anthomyiidae : (6) Anthomyia sulciventris Ztt., sh. 20. V. 97, 
800 ft. (7 and 8) Anthomyia spp., 20-22. V. 97, 7-900 ft. 
230 . Salix phylicifolia, Linn, (including S. nigricans , Sm.) [Lit 
7, 34, 36.] 
Visitor to male catkins. Hymenoptera. Aculeata: Apidae: (1) Bombus lap- 
ponicus F., sh. 13. V. 98, 700 ft. 
Visitors to female catkins. Hymenoptera. Aculeata: Apidae: (1) Bombus 
lapponicus F., sh. 13. V. 98, 800 ft. Diptera. Syrphidae : (2) Platychirus discimanus 
Lw., 21. V. 97, 1,300 ft. Empidae: (3) Rhamphomyia segmentata Ztt., sh. 13. VI. 99, 
1,400 ft. Chironomidae : (4) 1 sp., 13. V. 98, 700 ft. Anthomyiidae: (5) Hyetodesia 
semicinerea W., sh. 13. V. 98, 7-800 ft. (6) Anthomyia sulciventris Ztt., 21. V. 97, 
8-1,300 ft. (7 and 8) Anthomyia spp., 13. V. 98, 700 ft. Cordyluridae : (9) Scato- 
phaga stercoraria L., 21. V. 97, 1,300 ft. Coleoptera. (10) T elephorus obscurus L., 
sh. 13. VI. 99, 1,400 ft. 
231 . Salix herbacea, Linn. [Lit. Arct. 36, 38 ; Alps 2, 9.] Fruits 
very freely. 
Visitors to male catkins. Hymenoptera. Petiolata parasitica. Ichneumonidae : 
(1) 1 sp. Sessiliventres. Tenthredinidae : ( 2 ) Nematus ? capreae L., sh. Diptera. 
Chironomidae : (3 and 4) Ceratopogon spp,, sh. Anthomyiidae : (5) Anthomyia 
sulciventris Ztt., sh. (6) Anthomyia sp. All 24. V. 97, 2,600 ft. 
