Mesostigmata 69 



b. Prholaspina Berlese, 1918 



Type. Holostaspella micrarhena Berlese, 1916 



c. Tricholocelaeno Berlese, 1918 



Type. Holocelaeno longicoma Berlese, 1910 



6. Mflcro/fl5/?/5 Oudemans, 1931 

 Type. Gamcisus opaciis Koch, 1839 



7. Neopodocinum Oudemans, 1902 



Type. Neopodocinum jaspersi Oudemans, 1902 



8. Parholaspis "QqtXqsq, \9\^ 



Type. Parholaspis desertus Berlese, 1918 



9. TrigonholaspisWXzihuxn, 1930 



Type. Trigonholaspis salti Vitzthum, 1930 



Discussion: Macrochelids are extremely common and are found in 

 the soil, on invertebrates, and on vertebrates. Although they are regu- 

 larly associated with various hosts they are probably not parasitic in 

 the usual sense. Pereira and de Castro 1945, however, have found that 

 there is reason for the association in at least one case. Macrochcles 

 muscae (Scopoli), 1772 was found to feed in all instars but the first 

 (that does not feed) on the eggs of the housefly. Such a habit indicates 

 that macrochelids may have considerable economic as well as medical 

 importance although as yet the group has not been well investigated 

 from this aspect. 



References: 



Cooreman, J. 1943. Note sur la faune des Hautes-Fagnes en Belgique. Bull. 



Mus. Roy. Hist. Natur. Belgique. 19, No. 63:1-28. 

 Pereira, C. and M. P. de Castro. 1945. Contribuicoo para o conhecimento 



da especie tipo de "Macrocheles Latr." ("Acarina") : "M. muscae- 



domesticae (Scopoli, 1772)" emend. Arquivos Inst. Biol. 16:153-186. 

 Oudemans, A. C. 1931. Acarologishe Aanteekenigen. CVII. Ent. Ber. 



8:272-273. 

 Vitzthum, H. G. 1926. Malayische Acari. Treubia. 8, Linn. 1-2:1-198. 



Pachylaelaptidae Vitzthum, 1931 



Figure 53 



Diagnosis: The ventral armature of the female will distinguish pachy- 

 laelaptids from most other gamasids. The parapodal, peritremal, and 

 metapodal plates are fused into one and extend posterior to coxae iv. 

 They may actually abut the ventral plate and with it cover the major 



