242 Acarology 



both pretarsus and empodium are lacking. The palpi have five segments 

 with a thumb-claw complex. The chelicerae are long and stylet-like. 

 The gnathosoma is capable of being projected far anteriorly or with- 

 drawn into the body. No genital suckers are present. According to 

 Grandjean there is no protonymph. Heteromorphic without urstigma 

 the larvae possess trichoboths or sensory setae on the first pair of legs. 

 The larvae also have a scutum which possesses two pairs of sensory 

 setae and two pairs of ordinary setae. 



W<. /. * ^ 'J i A 



4;v.. ...... A /| 



L'^^ 



Figure 178 Smarts latreillei Grand- Figure 179 Smarts mamillatus (Say). 

 jean. Larva. (After Grandjean 1947) Dorsum of female, gnathosoma par- 

 tially extruded. 



Genera: 



1. Smarts Latreille, 1796 (= Smariidia Latreille, 1817 



lese, 1883) 

 Type. Trombidium squamatum Hermann, 1 804 



2. Aecosmaris Grandjean, 1947 



Type. Aecosmaris calUtricha Grandjean, 1947 



3. Fessoniav. Heyden, 1826 



Type. Trombidium papillosa Hermann, 1804 



4. Hirstiosoma Womersley, 1934 



Type. Hirstiosoma scalaris Womersley, 1934 



Dugesia Ber- 



