Pomona College, Clareiiiont. Calitoinia 



29 



Uropoda sp. ^'oiing on caiahici beetle and on Stnlnpendrii. 



Dermanvssidae. Mandibles for piercing. Body sometimes constricted. Para- 

 sitic on vertebrates. 



Dermanyssiis gallinae Redi. Parasitic on chickens. 



Orb.atidae. Horny beetle mites. Cephalothorax with a special hair on the pos- 

 terior lateral vertex. Skin hard. Abdomen wtih wing-like expansions. Body minute, 

 divided into two parts by transverse suture. Mouth-parts small hidden. Live upon 

 vegetable or decaying material. Palpi five-jointed. 



Hfrmannia hirrngtyphua Hall. Brown, black markings, mandible chelate. Roug 

 deep sculpturing. Claremom. 



