570 Willis and Bur kill, — Flowers and Insects . 
It remains now to compare our results with those of other 
observers, and the table which follows does this. As in the 
case of B' and A', we again find Muller’s observations very 
closely supported by those of Knuth, Verhoeff, Alfken and 
others on the coast of North Germany. Again we see the 
Alps showing an abundance of Lepidoptera, and our own 
country an abundance of short-tongued flies. F urther comment 
is reserved. 
TABLE XXXII. 
Comparison of species-visits to Clova flowers of Classes F and H in various 
parts of Europe. 
Apis. 
s' 
w 
W 
d, 
V 
i-l 
6 
Q 
Q 
”3 
O 
W 
Total. 
Clova 
(57 plants) 
17 
85 
3 
14 
56 
36 
95 
19 
12 
337 
Germany — Muller . 
(35 
) 
25 
230 
78 
2 
73 
46 
1 
19 
2 
476 
Flanders — MacLeod 
(25 
) 
IO 
74 
15 
10 
46 
12 
7 
8 
— 
182 
Friesian Coast — Knuth, 
Verhoeff, &c. . . 
(37 
55 
) 
23 
293 
66 
8 
54 
32 
12 
6 
I 
495 
Alps — Muller . . . 
( 2 3 
;> 
) 
3 
90 
2 
1 
179 
10 
1 
6 
2 
294 
Pyrenees — MacLeod . 
(11 
>> 
) 
41 
2 
— 
21 
9 
1 
1 
“ 
75 
In conclusion, Classes F and B obtained the visits of Apis 
mellifica, of nine species of Bombi (all in the district except 
B. cognatus and B. scrimshiranus), of Psithyrus quadricolor, 
of two species of Andrena, of a Nomada, and two species 
of Odynerus, of two species of Vespa, of two kinds of ants, 
and of two species of ichneumons, of eight butterflies, of 
twelve of the Noctuid moths which are almost entirely 
crepuscular or nocturnal, of five geometers, of five ordinary 
Micro-lepidoptera, including Hepialis humuli, and also of 
Eriocephala calthella ; among Diptera, of thirteen Syrphidae 
including Rhingia campestris, of five species of Empis, of one 
Rhamphomyia, of four Muscids, of one Sarcophaga, and of 
Siphona geniculata, of eight Anthomyiids including Drymia 
hamata, of two Scatophagids, and of eleven other flies ; of six 
Coleoptera, of two Hemiptera, of Thrips and of a spider. 
Thus 109 species of insects visited the two classes, making 
1,507 individual visits, the average constancy being 13-83. 
