ISLE OF WIGHT DISEASE IN HIVE BEES — ACARINE DISEASE. 779 



EXPLANATION OF FIGURES. 



Tarsonemus woodi, ii. sp. Microphotographs. 



(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 tracheate female ; focussed on ventral side to show tracheae. B, ovum. C, a male. 

 Obj. f in. Ocular No. 4. 



Fig. 3. Adult male. Obj. | in. Ocular No. 4. 



Fig. 4. Larva. Focussed to show double claw on first pair of legs. Obj. \ in". Ocular No. 4. 



Fig. 5. Larva containing nymph. Focussed to show the latter : a female. Out of focus : A, posterior 

 end of larva. B, iirst pair of legs of larva. C, gnathosoma of larva. Obj. \ in. Ocular No. 4. 



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

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



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

 Obj. Jr in. Ocular No. 4. 



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

 Obj. f in. Ocular No. 4. 



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



