Insects in Great Britain . 
347 
Bombi increase and so do mid-tongued flies on B' ; but on 
A' mid-tongued flies decrease towards autumn. A' owes its 
large number of long-tongued flies in spring to the genus 
TABLE XV. 
Species visits in different parts of Europe to the flowers of the Yellow- 
White series of BC 
1 Apis. 
s 
s" 
E 
w 
a 
& 
« 
P 
a 
p 
Q 
O 
O 
w 
Total. 
Clova (18 species) 
3 
8 
9 
29 
34 
83 
184 
26 
H 
39 ° 
Germany — Muller . (16 „ ) 
7 
63 
203 
26 + 
49 
IIO 
49 
56 
4 
567 + 
Flanders — MacLeod . (13 „ ) 
Frisian Coast — Knuth 
3 
18 
64 
15 
41 
74 
66 
18 
299 
and Verhoeff . . (16 „ ) 
8 
87 
*55 
5 
29 
86 
80 
11 
2 
463 
Alps — Muller . . . (11 „ ) 
1 
25 
26 
8 
161 
S 2 
61 
22 
— 
35 6 
Pyrenees — MacLeod (6 „ ) 
— 
5 
2 
1 
4 
8 
13 
6 
— 
39 
TABLE XVI. 
Species visits in different parts of Europe to flowers of A'. 
Apis. 
s 
a* 
a 
co 
a 
d 
P 
a 
p 
CO 
p 
'o 
U 
6 
W 
Total. 
Clova 
(7 species) 
2 

1 
3 1 
6 
27 
102 
n 
7 
189 
Germany— Mttller . . 
(4 
) 
2 
5 
59 
f 2 
7 
53 
71 
67 
10 
346 
Flanders — MacLeod 
Frisian Coast — Knuth 
(4 
V 
) 
I 
“ 
9 
18 
1 
28 
40 
7 
1 
105 
and Verhoeff . . . 
(5 
) 
— 
1 
21 
49 
— 
32 
49 
12 
— 
164 
Alps — Mtiller .... 
(2. 
» 
) 
— 
— 
2 
8 
— 
1 
5 
14 
— 
30 
Pyrenees — M acLeod 
(2 
) 
— 
2 
11 
2 
7 
19 
7 
48 
Platychirus, one of the least specialized of Syrphidae ; B' 
owes its larger number in autumn to highly specialized 
Empids and Eristalis. Injurious insects are chiefly summer 
insects. The actual figures recorded are given in Table XVII, 
the percentages from them in Table XVIII, and the net result 
in Table XIX. 
In conclusion, B' obtained the visits of Apis mellifica, of 
eight species of Bombus, one of Psithyrus, of one species 
of Halictus, two of Andrena, one of Odynerus, one of Vespa, 
A a % 
