Classification 



A systematic list of the 57 known Oriental Stilobezzia species is 

 presented in table 1. We can arrange these species conveniently into 

 three subgenera, Stilobezzia, Eukraiohelea, and Neostilobezzia. Within 

 these subgenera, only the first two have lent themselves to a satis- 

 factory breakdown into species groups; most of the Neostilobezzia, at 

 least the Oriental fauna, defy attempts at natural arrangement. 



The Brevicostalis Group of the subgenus Eukraiohelea is unique 

 among the Stilobezzia species in having a shortened costa, a stout 

 spine on the trochanter, and an extremely small, lappetlike aedeagus. 



In the subgenus Stilobezzia, the Boharti Group possesses several 

 neostilobezzian features in having a spacious first radial cell, long 

 costa, and little difference in the lengths of tarsomeres III and IV. 

 The species of the Poikiloptera Group have some eukraiohelean 

 features such as the extreme reduction of the first radial cell, the long, 

 columnar parameres, and linear aedeagal sclerites with their prominent 

 dorsomedian lobes that suggest that Eukraiohelea and Neostilobezzia 

 are only distantly related to each other though related separately to 

 Stilobezzia sensu stricto. 



In the appendix we have been only partially successful in assigning 

 the described world species of Stilobezzia to proper subgenera and 

 species groups. In the subgenera Eukraiohelea and Stilobezzia, our 

 eight species groups are well contrasted on the basis of color patterns 

 and body setation as well as by internal genitalic structures, and we 

 are fairly confident of their natural basis. 



When it comes to the subgenus Neostilobezzia, however, the problem 

 of species groups is quite different. Except for those belonging in the 

 Speculae Group, few group-level similarities could be found in the 

 Oriental species we studied, almost each being novel in its own way. 

 These species have, as a rule, no significant color pattern on their 

 body parts, and the setation, including such a basic subgeneric 

 criterion as the surface macrotrichia of the wing, presents such 

 devious intraspecific variation that even male-female collation from 

 random collection is often difficult. Further study of both sexes of 

 many of the described species and more detailed information on their 

 distribution will be necessary in order to arrive at a natural group 

 classification of this subgenus. For this reason, several group names 

 in Neostilobezzia, proposed by Tokunaga and Murachi (1959) and 



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