Williams.— Anatomy of Boophilus. 
PLATE 18. 
Fig. 1. Drawing of male tick, female tick, and eggs. Natural size. 
Fig. 2. Mouthparts of partly grown female, together with the piece of epider¬ 
mis pulled from the host; oc. 4, obj. 16 mm., tube 145 mm. X 55. 
Fig. 3. Cuticle of dorsum showing a “dorso-submedian porose plate ” ; oc. 4, 
obj. 8 mm., tube 145 mm. X 120. 
Fig. 4. Frontal section to show general relations of organs in a female ; oc. 
6, obj. (2 in.). X 25. 
Fig. 5. Frontal section through spiracle or stigma; oc. 4, obj. 8 mm., tube 
145 mm. X 120. 
Fig. 6. Cross section of mouthparts ; oc. 4, obj. 8 mm., tube 145 mm. X 120. 
