207 



iAll the legs equal in armature and 

 in hairs of tarsi Ceröphagus Oudrns. 

 Legs 4 arraed otberwise Trichotarsus Can. 



/ Under the claspers no sucker . . . Labidophorus Kram. 



5 | Under each clasper a pedunculate 



f sucker Dermacarus Hal Ier 



i Ventral side without any suckers at all Acotyledon Oudms. 



6 | Behind the genital aperture a sucker 



f plate 7 



!No eyes 8 

 Two eyes 12 



i All the legs short and thick; equal 

 \ in length; legs III and IV usually 



o / directed backward 9 



1 All the legs slender; legs III and IV 

 / shorter and slenderer than I and II, 

 ( usually directed forward . . . .11 



!Epirnera I absent; sternum free . . Aleurobius Can. 

 Epimera I short, joined to sternum . 10 

 !Anterior top of Cephth. hairless . . Tyroglyphus Latr. 

 Ant. top of Cephth. with 2 minute 

 hairs Hypopus Dugès. 



11 Only one genus Anoetus Duj. 



12 Only one genus Histiogaster Berl. 



7. Aleurobius farinae (L.). 



(With Plate VIII, fig. 14, 15). 

 Hypopus. Length varying from 200 — 235 yt.. — Colour white, 

 or pale; legs somewhat rosé. — Shape like that of the hypopi of 

 Tyroglyphus Latr. — Texture of the dorsal side granulate, of the 

 ventral side smooth. — Dorsal side (Fig. 14). Demarcation between 

 cephalothorax and abdomen distinct, slightly convex backward. 

 Cephalothorax with sinuated front-margin; with blunt, sinuated 

 top, on which two minute hairs; and with 4 smooth hairs on 

 the middle; the length of these hairs equals that of the cepha- 



14 



