266 
Willis and Bur kill. — Flowers and 
49 . Erica cinerea L. [See No. 19 , Auchencairn.] Fre- 
quent in the drier regions. 
Visitors. Lepidoptera. Rhopalocera: (i) Vanessa urticae L., s. h. 
8 oo ft. io. 9. 93. (2) Polyommatus phloeas L., do. Hymenoptera. 
Aculeata : Acutilingues : (3) Bombus muscorum L., do. 4 to 10. 9. 93. 
(4) B. terrestris L., do. 27. 8 to 7. 9. 93. No alpine observations 
could be made, as the higher parts of the mountains are too boggy for 
the growth of heather. 
50 . E. Tetralix L. [See No. 20, Auchencairn.] Frequent. 
Visitors. Lepidoptera. Rhopalocera: (1) Coenonympha pam- 
philus L., s. h. 800 ft. 28. 8. 93. Hymenoptera. Aculeata: Acuti- 
lingues'. (2) Bombus lapidarius L., s. h. 600 ft. 26. 8. 93. (3) 
B. muscorum L., s. h. 500-1000 ft. 26. 8 to 5. 9. 93. (4) B. terres- 
tris L., s. h. 900 ft. 4. 9. 93. No alpine observations. 
51 . Vaccinium Myrtillus L. [Class H, Lit. 1 , 2 , 3 , 4 , 17 , 
18 , &c.] Frequent in the hills, but the flowering season nearly 
over. 
Visitors. Hymenoptera. Aculeata: Acutilingues'. (1) Bombus 
muscorum L., s. h. ab. 900 ft. 3. 9. 93. (2) B. terrestris L., do. 
LYTHRACEAE: 52 . Peplis Portula L. [Lit. 330 a, 264 b, 
4 , 9 , 14 , 28 .] Abundant near Pont Erwyd, both on land and 
in shallow running water. The flower is small (3 mm. diam.) 
sessile and very inconspicuous ; the 6 minute white petals are 
very fugacious. The stigma is ripe a little before the stamens; 
these are bent inwards in the opening flower and pollinate it. 
All the flowers set their full complement of seed. No insect 
visitors were observed. 
VlOLACEAE: 53 . Viola lutea Huds. [Class H.] Abundant 
in the hills (except Potentilla , almost the only flower). 
Visitors. Diptera. Tachinidae'. (1) Siphona geniculata Deg., s. h. ? 
800 ft. 15. 9. 93. Anthomyiidae : (2) Hylemyia lasciva Ztt., do. 5. 9. 
93. (3) Anthomyia sp. ? do. 29. 8. 93. No visitors seen at alpine 
levels. 
ROSACEAE : 54 . Potentilla Tormentilla L. [See No. 29 , 
Auchencairn.] This plant abounds on all the hills, reaching 
