Insects in Great Britain . 
555 
Flanders. Myrmica rubra was seen (24. VI. 95) on the stipules 
apparently on account of the honey there. 
Visitors . Hymenoptera. Aculeata : Apidae : (1) Bombus venustus 
Smith, sh. Diptera. Anthomyiidae : (2) Hyetodesia incana W., seek- 
ing h. Sepsidae : (3) Sepsis cynipsea L., seeking h. All at 800 ft. 
18. VI. 96. 
130. Lathyrus pratensis, Linn. [Lit. Brit. 23 ; N.C.B. 1 , 
3 b, 14 , 14 a, 18 , 21 b, 32 , 34 , 40 ; Arct. 36 ; Alps 2 , 34 ; 
Medit. 34 .] A bee-flower, but not freely visited. Fertiliza- 
tion is, however, dependent on insect visits. 
Visitors. Hymenoptera. Aculeata : Apidae : (1) Apis mellifica 
L., sh. 1 1. VII. 96, 700 ft. once. Diptera. Anthomyiidae : (2) An- 
thomyia sp., fp. 4-5. VII. 95, 800 ft. Hemiptera. (3) Anthocoris 
? nemorum L., seeking h. 16. IX. 95, 900 ft. 
131. Lathyrus macrorrhizus, Wimm. [Lit. Brit. 23 ; 
N.C.E. 14 , 21 b, 34 , 40 ; Loew 1358 ; Pyren. 17 .] A Bombus- 
flower needing insect aid for fertilization, and, as it is not freely 
visited by insects, commonly sterile. 
Visitors. Lepidoptera. Rhopalocera : (1) Pieris napi L., sh. 10. 
VI. 99, 700 ft. Hymenoptera. Aculeata : Apidae : (2) Bombus 
lapidarius L., sh. 21. V. 96, 800 ft. (3) B. agrorum F., 1. VI. 97, 
19. VI. 99, 800 ft. Diptera. Anthomyiidae : (4) Anthomyia sul- 
civentris Ztt., seeking h. 24. V. 97, 800 ft. 
132. Polygala vulgaris, Linn. [Lit. Brit. % Hart. 933 ; 
N.C.E. 1 , 3 b, 14 , 18 , 21 b, 34 ; Pyren. 17 .] Poly gala vulgaris 
is another neglected bee-flower. Apis and Bombi are 
recorded — the one or the other — as frequent visitors by 
Muller in Germany, by MacLeod in the Pyrenees, and (to 
P. deprena) by MacLeod in Flanders ; both have been 
observed on P. vulgaris by Knuth in the North Friesian 
islands. At Clova spontaneous self-fertilization is the rule. 
Self-fertilization likewise is common on the Continent. At 
Clova the wings are usually bright blue, and, when the flower 
is open, 7 mm. long. A tongue 4 mm. long is sufficient to 
reach the honey. 
Visitors. Diptera. Muscidae : (1)1 sp., 6. VII. 94, about 2,000 ft. 
