ILLUSTRATIONS. | 
Pl. I. Gastrophilus equi in: stomach of horse: -.222..252,.--82252 s-Soce ee 
Ll, Species" of Mallophaga®: <2 2.2. 22222 222. Ss ese eae ee See 
Ii, Argasimges 22 205.20 262 5 ol a beans coe ane geen See ee 
IV. The cattle tick (Boophilus bowie Riley) 22.24 .-%- 22255. soso eee 
V. The cattle tick (Boophilus bovis Riley)---.----..--..-------------------- 
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