on the feet of animals , &c. 327 
Fig. 6. A side view of a portion of some of the suckers, 
showing the insertion of the muscles, magnified 2500 times. 
Plate XVIII. 
Fig. 1. A left front leg of the blue bottle fly, musca vomi- 
toria, magnified 100 times. 
Fig. 2. A view of the under side of the last joint of the 
toe, with the two suckers expanded, as seen when the fly is 
walking against gravity. 
Fig. 3. Side view of ditto. 
Fig. 4. Upper side of ditto. These three figures are mag- 
nified 6400 times. 
Fig. 5. View of the under side of a single sucker of a dead 
fly- 
Fig. 6. Side view of ditto. 
Fig. 7. Upper side of ditto. These three figures are mag- 
nified 6400 times. 
Fig. 8. Left front leg of bibio febrilis (Latr. ) Magnified 
100 times. 
Fig. 9. The under side of the last joint of the toe of ditto. 
Fig. 10. Side view of ditto. 
Fig. 11. Upper side of ditto. These three figures are mag- 
nified 6400 times. 
Plate XIX. 
Fig. 1. The left front leg of cimbex lutea, (Fabr.) a , thigh; 
b, shank ; c, calces ; d, toe ; e, plantar suckers ; f, sucker be- 
tween the claws ; g, unguis or claw. 
Fig. 2. Side view of ditto. 
Fig. 3. Under side of the left front leg. These three 
magnified 100 times. 
V 
