THE GENUS DEMODEX. 43 



Plate V. 



Fig. 22. Demodex phylloides, Csokor, ? . Ventral view, x 517. 

 „ 23. „ call, Megnin, (J . Dorsal view, x 847. 



„ 23 a. „ „ Penis. 



„ 24. „ phylloides, Csokor, ? . Dorsal view, x 52fi. 



„ 25. „ hovis. Larva. 



„ 26. „ „ Ponis. 



„ 2& a. End of penis of D. hovis as it appears when protruding from sexual 



orifice. 

 „ 26 6. Tip of penis of the same species greatly enlarged. 



Plate VI. 



Fig. 27. Demodex muscardini, Hirst. Young nymph. 

 „ 27 a. „ „ One of the epidermal scales of this nymph, 



greatly enlarged. 

 „ 27 h. „ „ End of palp of nymph much enlarged. 



„ 28. „ „ Ovum. X1147. 



„ 29. „ „ Larva. x2100. 



„ 30. Large nymphal form oi D. hovis showing completely formed adult inside. 



x485. 

 „ 30 a. One of the appendages of this nymph greatly enlarged. 



Plate VII. 



Fig. 3L Demodex muscardini, ?, Ventral view. X 835. 

 „ 32. „ „ Lateral view of nymph. X 1555. 



„ 33. „ „ $ . Lateral view showing an egg in situ, x 888. 



Plate VIII. 



Fig. 34. Demodex erminece, sp. n., c? • Dorsal view, x 984. 

 „ 34 a. „ „ Penis. 



„ 35. „ muscardini, ^ . Dorsal view, x 1000. 

 „ 36. „ „ Older 3ymph. 



Plate IX. 



Fig. 37. Demodex arvicolce, Zschokke, $ . Ventral view. X 800. 

 „ 38. „ „ var. musculi Oudms. Elongated nymphal form. 



X765. 

 ,, 38a&i. „ „ „ Lateral platelets of this nymph 



much enlarged. 

 „ 39 & 40. „ „ „ ? . Ventral views showing vari- 



ation in shape of body. 



