ILT.USTRATTONS. 



Fig. T. — Fourth stage Larva of Hypoderma bov-is, lateral view .53 



Fig 11. — Variation in the spiny armature . . . . . . 54 



Fig. III. — Comparison of spines on latero-ventrai areas . . . . 5.5 



Fig. IV — Tomparison of spines on corresponding areas of another 



specimen . . . . . . . . . . 36 



