JOURNAL OF MICROSCOPICAL SCIENCE. 
EXPLANATION OF PLATE XVII, 
Illustrating Mr. Moseley’s paper on the Circulation in the 
Wings of Blatta orientalis and other Insects, and on a 
New Method of Injecting the Vessels of Insects. 
Fig. 
1.—Sketch of apparatus for holding Blatta for observation. 
2.—Hind wing of Blatta orientalis. The arrows indicate the usual direc- 
tion of the blood-current. 
3.—Portion of same greatly enlarged, showing the structure of vessels. 
4.—Same, showing active circulation. 
5.—Various blood-corpuscles of B. orientalis. 
6.—Vessels from base of hind wing of a small hymenopterous insect. The 
three crosses indicate the rhythmically contractile parts. 
