32 U.S. NATIONAL MUSEUM BULLETIN 2 83 



This subgenus becomes dominant in the temperate regions and 

 especially in southern South America. 



Key to the Oriental Species of the Subgenus Neostilobezzia 



1. Large dark species with broadly banded legs; wing with obscure color pattern 



consisting mainly of dark areas over IRC, tip of R 2 , and distally in cell 

 R 5 ; vein M 2 not interrupted at base; several setae on radius; a few macro- 

 trichia on wing surface close to distal margin (Speculae Group) .... 2 

 Small to large species without definite banding on legs or dark markings on 

 wing; vein M 2 obscure at base; setae absent on radius or if present, 

 macrotrichia are present on other vein tips as well and may occur on wing 

 surface sparsely to densely 4 



2. Very large species; scutum without anterior tubercle, with color pattern 



of dark and silvery white patches; palpal segment V pale; wing spots 

 feebly dark; abdominal terga dark with scattered silvery white patches. 



speculae Macfie 



Large species; scutum with anteromedian tubercle present; scutum and 



abdominal terga without white patches 3 



3. Scutum brownish with indistinct paler variegations; anterior tubercle promi- 



nent; palpal segment V dark; wing spots moderately dark. 



subnebulosa, new species 

 Scutum uniformly dark brown without color pattern; anterior tubercle 

 blunt; palpal segment V intensely dark; wing spots very dark. 



venefica, new species 



4. Antennomere XV with an apical seta; palpal segment I with a hair . . 5 

 Antennomere XV without ap'cal seta; palpal segment I with or without 



hair 15 



5. Abdominal tergum I with more than 10 hairs in addition to the 2 lateral 



hair clusters; spermathecae large, oval without necks, with clear hyaline 

 perforations; male genitalia with massive basistyle; mediangular processes 

 reduced, faintly sclerotized; parameres clublike; aedeagal sclerites stout- 

 tipped magnitheca, new species 



Abdominal tergum I with 2-5 hairs in addition to those in the 2 lateral 

 clusters; spermathecae and male genitalia not as above 6 



6. Abdominal tergum I with only a pair of weak hairs in addition to those in 



the 2 lateral clusters 7 



Abdominal tergum I with 4-5 hairs in addition to those in the 2 lateral 

 clusters 12 



7. Medium size, yellowish brown species; wing with IRC small, r-m and distal 



sector of Rl almost in a line; legs with sparse, weak setae; male genitalia 

 with mediangular processes stout, short; paramere body long, slender, 

 straight for most of its length and tapering to abruptly bent, filiform 



tip artistyla, new species 



Medium to large size, brownish species; wing with IRC large, r-m and distal 

 sector of R] not in a line; leg bristles numerous to abundant; male genitalia 

 not as above 8 



8. Wing length less than 1 mm; scutum, postscutellum, and abdomen brown to 



brownish; female tarsal claws strikingly small, sharp, and nearly straight; 

 spermathecae elongate oval, unequal, with hyaline perforations. 



parvaeungulae, new species 



Wing length 1 mm or more; female claws not unusually small; otherwise 



not as above 9 



