48 Acarology 



4. fr///mfl/7A2W Balogh, 1938 



Type. Willmannia sejiformis Balogh, 1938 



5. Zuliuicarus Tv'igkvdh, \906 



Type. Zuluacarus termitophilus Triigardh, 1906 



Discussion: Liroaspids have been found mostly in tropical countries, 

 but species of Liroaspis have been collected in northern Europe and in 

 the northern half of North America. The structure of their stout che- 

 licerae indicates that they are predaceous. Specimens have been col- 

 lected from plants, and Fox 1947 collected two specimens from two 

 rats in Puerto Rico. The presence of Liroaspis armatus on rats does 

 not necessarily mean that they are ectoparasitic on these hosts. They 

 may have been on the rats purely by accident, or they may prey upon 

 the large fauna of ectoparasites that infests rats. Except for their oc- 

 currence on rats liroaspids are of no known economic or medical 

 importance. 



References: 



Balogh, J. 1938. Systematische Studien iiber eine neue Milbengattung: 

 Willmannia gen. nov. Zool. Anz. 123:259-265. 



Fox, I. 1947. Seven new mites from rats in Puerto Rico. Ann. Ent. Soc. 

 America. 40:598-603. 



Tragardh, I. 1943. Further contributions towards the comparative mor- 

 phology of the Mesostigmata (Acarina), the Antennophoridae, and 

 the Megisthanidae. 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. 



Epicriidae Berlese, 1885 



Figure 37 



Diagnosis: Epicriids can be readily recognized by the pattern of small 

 elevations on the dorsal surface that gives the appearance of a fine 

 geometrical network. The sternal plates of the females are divided so 

 that sternal plate i is separated from plates ii, iii, and iv. The male 

 genital aperture is situated in the sternal plate and is closed by a 



