542 
Willis and Bur kill. — Flowers and 
means of anthers still adhering to their filaments, and seems 
to take place, fruiting being regular. The flowers are 12- 
14 mm. in diameter; the petals have a claw 3 mm. long and 
a limb 4 mm. notched to halfway. As the internode between 
sepals and petals is about 1 mm. long, the honey at the base 
of the flower is about 4 mm. removed from the mouth, 
a distance a little less than the width of the mouth. Thus 
the tube is rather funnel-shaped than tubular. The flowers 
are very variable in the number of parts, six petals being 
frequently, seven occasionally, present. It is possible that the 
flower should be regarded as belonging to Class B. 
Visitors. Hymenoptera. Aculeata: Apidae : (1) Psithyrus quadricolor 
Lep., sh. 2. VII. 96, once. Diptera. Chironomidae : (2) 1 sp., 2. VII. 
96. Anthomyiidae : (3) Trichophthicus sp., sh. 27. VI.-2. VII. 96. 
Thysanoptera. (4) Thrips sp., 2. VII. 96. All at 2,850 ft. 
97. Primula vulgaris, Huds. [Lit. Brit. 23 , 29 ; Christy in 
Trans. Essex Field Club, iii. p. 195 ; Darwin 470 and 485 ; 
Briggs 290 ; Scott 2253 ; N.C.E. 1, 33 .] One of us gave some 
account of the fertilization of the Primrose (see lit. 29) a few 
years ago, showing how the conditions of its fertilization are 
hardly known. Since then we have noticed that it is very 
abundantly visited at Kew by a bee, Anthophora acervorum , 
and is visited also by it in Essex (see Miller Christy, loc. cit). 
This insect does not occur at Clova. We have seen few 
visitors in our district. The tube is 12*5-16 mm. long there ; 
it is longer in England and Germany. We found certain 
long-styled flowers with the style dwarfed, probably in 
deformity, and in them the Anthomyiids were able to push 
their way down the throat to the stamens. 
Visitors. Hymenoptera. Aculeata: Apidae : (1) Bombus hor- 
torum L., sh. 20. V. 97, 800 ft. once. Diptera. Anthomyiidae'. (2) 
Anthomyia sulciventris Ztt., fp. and seeking h. 20-22. V. 97, 6-1,200 
ft. freq. (3) Hylemyia sp., fp. 20. V. 97, 900 ft. Coleoptera. (4) 
Meligethes sp., fp. 22. V. 97, 10. VI. 99, 700 ft. Araneida. (5) 
Xysticus sp., lying in wait on the corolla, 22. V. 97, 600 ft. 
