Mesostigmata 



51 



Genus: 



Microgynium Tragardh, 1942 



Type. Microgynium rectangulatum Tragardh, 1942 



Discussion: M. rectangulatum was found under the loose bark of old 

 tree stumps. Larvae, nymphs, males, and females were collected. Only 

 one nymphal stadium was described. These mites are of no known 

 economic or medical importance. 



References: 



Tragardh, I. 1942. Microgyniina, a new group of Mesostigmata. Ento- 

 mologisk Tidskrift Arg. 63. Haft. 3-4:120-133. 



. 1943. Further contributions towards the comparative morphology 



of the Mesostigmata (Acarina) the Antennophoridae and the Megis- 

 thanidae. Arkiv. for Zoologi. 34A. N:o 20:1-10. 



. 1946. Outlines of a new classification of the Mesostigmata (Aca- 

 rina) based on comparative morphological data. Lunds Universitets 

 Arsskrift. N.F. Avd. 2. 42: No. 4:1-37. 



. 1946. Contributions towards the comparative morphology of the 



Mesostigmata (Acarina) VII. The praesternal hairs and the male 

 genital aperture. Sartryk ur Entomologsk Tidskrift. Arg. 67. Haft. 

 3:88-108. 



Microsejidae Tragardh, 1942 



Figure 39 



Diagnosis: The microsejids are 

 similar to the previous family but 

 differ in that there are four dorsal 

 plates and an undivided ventral 

 plate in the female. 



Figure 39 Microsejus truncicola Tra- 

 gardh, 1942. Ventral view of female. 

 (After Tragardh 1942) 



