106 



A carology 



Key to the Trachytina 



(after Tragardh, 1941) 



Epigynial plate hinged to ventral plate 2 



Epigynial plate fused with ventral plate Polyaspidae 



Metasternal plates narrow, elongated, flanking sides of epigynial 

 plate Trachytidae 



Metasternal plates almost obliterated, only traces being left in 

 posterior angles of genital orifice Polyaspinidae 



Genera: 



Trachytidae Tragardh, 1938 



Figure 77 



1. rrac/7y/^5 Michael, 1894 



Type. Celaeno aegrota Koch, 1841 



2. Neoseius Oudemans, 1903 (? deutonymph only known stage) 

 Type. Uroseius novus Oudemans, 1902 



3. Uroseius Berlese, 1888 



Type. Uropoda acuminata Koch, 1847 



Figure 77 Trachytes aegrota (Koch), Figure 78 Dipolyaspis sansonei Ber- 

 1841. Dorsal view of female. (After lese, 1916. Ventral view of female. 

 Tragardh 1941) (After Tragardh 1941) 



