146 
Psyche 
[Vol. 92 
Fig. I. Male Masoncus spider in harvester ant nest chamber. 
Belbidae, Uropodidae, Laelaspidae and Rhodacaridae. Belbids are 
very small mites common in the soil. Uropodids ( Oplitis ) are com- 
mon in moist litter and are also found in ant colonies (Hunter and 
Farrier 1976) as are laelaspid mites. The laelaspid found in our nests 
was probably Laelaspis moseri Hunter or Laelaspis mumai Hunter. 
The rhodacarid belonged to the genus Rhodacarellus, a potentially 
predatory genus frequently found in deciduous leaf litter. Harvester 
ant nests also contained a few silverfish (Nicoletiidae), diplurans 
(Japigidae) and less frequently millipeds and staphylinid beetles. 
