Mites Injurious to Domestic Animals. 



77 



numbers for many years at an isolated farm in Belgium and causing 

 great irritation by its bite to human beings and domestic animals 

 (dogs, cats, fowls, guinea-fowl, and ducks). It,is supposed to have 

 been imported in guano from Peru. Fig. 43 of this mite is drawn 

 from some of Moniez' original preparations now in the collection 

 of the Faculty of Medicine of the Paris University. 



Harvest Bugs (Leptus, etc.) 

 Harvest bugs are the larval forms of various Trombidiid mites. 



FIG. 65. 



Liponyssus bacoti (p. 89), x 64. A widely distributed parasite of 



the brown rat, sometimes attacking man. (a) Ventral aspect. 



(b) Dorsal aspect. (After Hirst, Bull. Ent. Res. 1914.) 



Owing to the fact that the adult stage is usually not known, it is 

 necessary to allot provisional specific names to these larval mites. 

 Both wild and domestic animals are sometimes molested by 

 harvest bugs. For instance, cats and dogs are often attacked 

 during the warmer seasons of the year by our common Leptus 

 (Trombicula ?) autumnalis^Sh&w. According to Oudemans, Meta- 

 thrombidium poriceps, Oudemans, also attacks dogs. Harvest bugs 

 also molest man, horses, cattle, sheep, and goats. Similar mites have 

 also been found on domestic poultry both in England and on the 



