ISLE OF WIGHT DISEASE IN HIVE BEES — ACARINE DISEASE. 217 



EXPLANATION OF FIGURES. 



Tarsonemvs woodi, n. sp. Microi)hotogTiiplis. 



(All the preparations are photographed with a Watson Service Microscope.) 



Fig. 1. Adult female, ventral view. Obj. \ in. Ocular No. 4. 



Fig. 2. A, young traclie.ite female ; focussed on ventral side to show tracheee. B, ovum. C, a male, 

 (jbj. § in. Ocular No. 4. 



F'ig. 3. Adult male. Obj. g in. Ocular No. 4. 



Fig. 4. Larva. Focussed to show doul^le claw on first i)air of legs. Obj. J in. Ocular No. 4. 



Fig. 5. Larva containing nymi)h. Focussed to show the latter : a female. Out of focus : A, posteriot 

 end of larva. B, iirst paii; of legs of larva. C, gnathosonia of larva. Obj. J in. Ocular No. 4. 



Fig. 6. .Male. Focus.sed to show sensory organ, A, on second pair of legs. Shows also spine on fourth 

 pair of legs. Obj. J in. Ocular No. 2. 



Fig. 7. Posterior end of male, showing last pair of legs and external genitalia. A, spine. B, genital lobes. 

 Obj. \ in. Ocular No. 4. 



Fig. 8. Teased trachea showing : A, adult female. B, immature female (tracheatc). C,' two males. 

 Obj. 5 in. Ocvilar No. 4. 



Fig. 9. Female, .showing tracheae. Obj. ^-^ in. Ocular No. 4. 



