1892.] Entomology. 787 
and experiments. A recent bulletin from South Dakota gives the fol- 
lowing account of the new insectary at Brookings: 
Recognizing the necessity of facilities for rearing insects in a situa- 
tion where all external conditions could be controlled, as well as of 
a suitable place for keeping the collections and apparatus of the depart- 
ment, the board of trustees last year authorized the construction of a 
building for the entomological department. This was occupied about 
June 25. It is a structure 16x32 feet in size, with wing 12 feet square. 
In the main part is the general office and work room, 16 feet square, a 
well finished room, provided with desk, tables, balances, shelves for col- 
lections, &c. Here are kept a general collection of all orders of in- 
sects, chiefly collected in this locality; some economic collections, 
showing the transformations, work and parasites of some of the common 
injurious insects; samples of various insecticides, and a few bee 
supplies. 
The rearing-room, or insectary proper, occupies the remainder of the 
main part of the building. It is an unfinished room with dirt floor, 
lighted by five large windows. It is as yet but partially fitted up, 
owing to the fact that the rearing season was almost past when we 
moved into the building lastspring. Breeding cages and other devices 
for this line of work will be in operation this year. 
The wing on the east side of the main building is devoted to bee- 
keeping and storage of machinery, &c. The bees are placed on a low 
shelf along the side of the room, the faces of the hives toward the out- 
side. Horizontal slits through the wall, one immediately in front of 
each hive, give the bees egress. This arrangement is called a house 
apiary, and presents several advantages in our circumstances. The 
hives are safe from violent winds and are in a very convenient place 
for working with them, as by nearly closing the door the room can be 
darkened until the bees will not fly in it. 
Wasps and Humming Birds.—My attention was recently 
called by Prof. H. G. Jesup to a row of English white birch trees in 
Hanover, N. H., which had been bored by woodpeckers. Although 
most of the holes were old, the sap was evidently still exuding 
about some of the trees as they were visited by swarms of flies, and 
many wasps, particularly the “ white faced hornet” (Vespa maculata), 
There were also several humming birds ( Trochilus colubris) eager for a 
taste of the sap. But whenever one of the latter approached a wasp 
would dash savagely at it and drive it away. This was repeated over 
