346 



ARTICULATA : INSECTA. 



3. THE SUB-ORDER OF ACARINA or Mites, have oval or 



rounded bodies which ex- 

 hibit no articulation or di- 

 visions into segments, the 

 cephalo-thorax and abdo- 

 men being merged toge- 

 ther. Most of the species 

 are very minute ; a few 

 kinds, however, as the Ticks, 

 attain the length of half an 

 inch. The Red Mites or 

 Trombididae, are common 

 in the dry warm beds of the 

 garden. The Ticks or Ixo- 

 ^ge mites with 



ing disk d; a, glossoide; 6, mandibles; c, leather-like bodies ; they at- 

 maxillary palpi. -, , , 



tacn themselves to man and 

 animals, especially in warm countries. 



Of the true Mites or Acaridse, we may mention the 



FIG. 471. 



FIG. 472. 



Tick, 



, Packard. 



Adult ;six-footed young ; mouth parts of 'i-j 

 young; and foot showing claws aud suck- ' ffi '' 



Nose-Mite, Demodex Jolh- 

 culorum. Highly magni- 

 fied. 



Psora or Itcb-ineect, Sarcnples scal/iel, De Geer. Highly magnified. 



