a . 
Ixxvi 
of Homoptera (Jassidae). Drerera—one small fly only, but 
numerous pupae and larvae of Chironomus. HyMENOPTERA— 
Vespa vulgaris, 6 species of ants (which were swarming), 
and a small black sawfly at present undetermined. Orrno- 
PTERA—a grasshopper. 
“Many stones, possibly swallowed with caddis grubs, 
several seeds, and two feathers, these no doubt mistaken 
for flies in the ripples on the water, were also found. 
“The beetles chiefly represented were the Carabidae with 
10 species ; Staphylinidae—9 species ; Curculionidae—6 species. 
“ In this particular trout by far the greater part of the whole 
food contents was made up of the Curculionid beetle, Stones 
hispidulus and the flying ants; of both these, each of the six 
fish contained countless specimens. The largest insects— 
wasps, Pentatomid bugs, grasshoppers and dragon-fly nymphs 
—were generally more or less chewed up, the others mostly 
swallowed whole. 
“The general absence of two-winged flies or Diptera was 
remarkable. If fish had been obtained at night or early in 
the morning probably more moths and a good many caddis- 
flies would have been found, but these are easily digested and 
soon disappear from the alimentary canal. 
‘On different days the food contents varied much in these 
trout. When ants were swarming there were days when this 
formed almost the whole food : on other days all the fish were 
crammed with Aphodius contaminatus. 
“The most minute insects are taken, e.g. the 4 species of 
parasitic Hymenoptera, representing the Chalcididae (Ptero- 
malus), Proctotrupidae (Diapria), Alysiidae and Cynipidae ; 
also the very small gnats which sometimes cover the water 
after drifting into some sheltered position. 
“In past years when I have occasionally been able to fish 
the reservoirs in the evening, the rise is sometimes entirely 
confined to that time of day and to the most minute gnats. 
Although the water may be everywhere ‘ boiling’ with trout, 
it is then often impossible to get a rise at any artificial fly. 
“In spite of the uncertainty of the food-supply on any 
particular day all the trout caught were in fine condition, the 
average weight being ? lb., and the largest fish (mentioned 
