Bui. 72, Bureau of Entomology, U S Dept. of Agricultur 
Plate IV. 
Stigmal Plates of Ticks. 
Fig. 1.— Stigma! plates and anus of Dermacentor nitens, male. Fig. 2. — Stigmal plate of same. 
Fig. :-?. -Stigmal plate of Amblyomma cajennense, male. Fig. L— Same, female. Fig. 5. — Stig- 
mal plate of />' fume ntor vat iabilis, female. Fig. 6.— Stigmal plate <>f l>< rmnenitm-nrri'iriifti/is. 
Highly magnified. I Original. | 
