Insects in Great Britain . 
627 
30. VI. 9 6, 2,100 ft. Bibionidae : (15) Dilophus albipennis Mg., sh. 22. VI. 95, 
18-2,300 ft. Chironomidae : (16) Tanypus nebulosus Mg., sh. 15. VII. 95, 2,400 ft. 
(17) Another Chironomid, sh. 17. VI. 95, 1,800 ft. Limnobidae : (18) Dicranomyia 
morio F., sh. 22. VI.-3. VII. 96, 22-2,400 ft. Anthomyiidae : (19) Drymia hamata 
Fin., sh. 22. VI. 95; 1. VII. 96, 18-2,400 ft. (20) Trichophthicus hirsutulus Ztt., 
sh. 6-20. VII. 96, 23-2,400 ft. (21) Trichophthicus sp., sh. 20. VII. 96, 23-2,400 ft. 
(22) Anthomyia sulciventris Ztt., 22. VI. 95, 1,800 ft. (23, 24, and 25) Anthomyia 
3 spp., sh. 21. VI.-i 1. VII. 95; 22. VI.-6. VII. 96, 15-2,600 ft. Cordyluridae : 
(26) Scatophaga stercoraria L., fp. 22. VI.-4. VII. 95; 30. VI. 96, 21-2,500 ft. 
Phoridae'. (27) Phora rufipes Mg., sh. 3. VII. 96, 2,200 ft. Coleoptera. (28) Meli- 
gethes viridescens F., sh. 22. VI. 95 ; 3-6. VII. 96, 18-2,400 ft. (29) Anthophagus 
alpinus Payk., sh. freq. 3-4. VII. 95; 22. VI.-6. VII. 96, 21-2,600 ft. (30) Helodes 
marginata F., 24. VI. 95, 1,600 ft. (31) Epuraea aestiva L., sh. 3. VII. 96, 2,400 ft. 
Thysanoptera. (32) Thrips sp., sh. 3-4. VII. 95, 2,600 ft. Araneida. (33) Oligo- 
lophus sp., once in the flower, 20. VI. 96, 2,100 ft. 
Class AB, § 59. Alsine Type. 
218 . Cerastium triviale, Link. [Lit. Brit. 23, 29 ; N.C.E. 1, 3 a, 3 b, 
14, 18, 21 a, 21 b, 25, 34.] Varieties from high up have larger flowers than 
occur low down. The stigmas of these ultimately recurve so far as to bring 
about self-pollination. The long stamens dehisce just before the short ones . 1 
Visitors. Hymenoptera. Petiolata parasitica. (1) sp., sh. 2. VII. 95, 800 ft. 
Diptera. Syrphidae\ (2) Platychirus manicatus Mg., sh. and fp. 6. VII. 95 ; 25. VI. 
96, 7-800 ft. Mycetophilidae : (3) Sciara ?, sh. 2. VII. 96, 2,800 ft. Chironomidae'. 
(4) Orthocladius sp., sh. 29. VI. 95, 1,600 ft. Anthomyiidae'. (5) Limnophora sp., 
sh. 1. VII. 95, 800 ft. (6) Anthomyia radicum L., 10-n. VI. 99, 7-800 ft. (7) Tri- 
chophthicus sp., 2. VII. 96, 2,800 ft. Phoridae'. (8) Phora sp., 13. VI. 99, 900 ft. 
Thysanoptera. (9) Thrips sp., sh. 3. VII. 95 ; 29. VI. 96, 8-1,000 ft. 
219 . Cerastium alpinum, Linn. [Lit. Brit. 23 ; Arcl. 7, 34, 36, 37 a, 
38 ; Alps 2 , 9, 21 b, Ludwig 1394.] The flower is conspicuous, the petals 
attaining a length of 12 mm. Fruit is set in plenty in July and later, but 
flowering continues beyond this. 
Visitors. Hymenoptera. Petiolata parasitica. Chalcididae : (1)1 sp., sh. 17. 
VI. 99, 2,300 ft. Diptera. Anthomyiidae'. (2) Drymia hamata Fin., sh. 17. VI. 99, 
2,300 ft. (3) Trichophthicus sp., sh. and fp. 20. VI. 96, 23-2,400 ft. Coleoptera. 
(4) Meligethes aeneus F., sh. 17. VI. 99, 2,300 ft. Thysanoptera. (5) Thrips sp., 
17. VI. 99, 2,300 ft. 
220 . Stellaria media, Cyr. [Lit. Brit. 23, 29 ; N.C.E. 1, 3 b, 14, 18, 
21 a, 21 b, 25, 33, Warnstorf 2507 ; Alps 2; N. Am. 12 b.] Always self- 
fertilized in the absence of insect visitors. 
Visitors. Hymenoptera. Petiolata parasitica. Ichneumonidae : (1)1 sp., 17. 
1 In August, 1905, on the Yorkshire moors north of Scarborough, about 40 per cent, of the 
flowers of Cerastium triviale then open had infertile stamens. 
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