Trom b id i form es 



165 



4. Phthiroides Oudemans, 1937 



Type. Phthiroides megnini Oudemans, 1937 



5. Pygmephorus Kramer, 1877 



Type. Pygmephorus spinosus Kramer, 1877 



6. Resinacarus Vitzthum, 1927 



Type. Resinacarus resinatus Vitzthum, 1927 



7. Siteroptes AmQvWng, 1861 (= Therismoptes AmcrXing, 1861 = Pedi- 



culopsis Reuter, 1907) 

 Type. Acarus graminisugus Hardy, 1851 



8. Tarsonemoides Tragardh, 1904 



Type. Tarsonemoides termitophilus Tragardh, 1904 



Figure 111 Py emotes (=i Pediculoides) 

 ventricosus (Newport). Partially grav- 

 id female. 



Figure 112 Siteroptes (= Pediculop- 

 sis) graminum (Reuter). Respiratory 

 system of gravid female. 



Discussion: The life cycle of Pyemotes (= Pediculoides) ventricosus 

 (Newport) is as follows. Males and females are produced viviparously 

 and are sexually mature at birth. The female is fertilized immediately 

 after emergence and seeks a suitable host and pierces it with the stylet- 

 like chelicerae. As it feeds the tip of the abdomen becomes enormously 

 distended and the eggs develop and hatch within the swollen bag. The 

 developing mites complete all their stages within the parent and do not 

 emerge until mature. The first to emerge are the males, usually only 

 a small number. These males feed very little and pierce the parent 



