Aphiochaeta. 225 



8. Supraantennal bristles equal or about; front tarsi 



simple 9. 



— Supraantennal bristles unequal; front tarsi with 

 the three first joints a little stout (only male 



known) 88. griseifrons Lundbk. 



9. Larger species, 1,5 mm; hypopygium small (only 



male known) 89. fumicolor Lundbk. 



— Small species, 0,5— 0,75 mm; hypopygium large. . . surdifrons Wood. 



10. Costa with a distinct incrassation at the humeral 



cross- vein 90. parva Wood. 



— Costa without isolated incrassation at the hume- 

 ral cross-vein, when incrassated it is in the whole 



first part 11. 



11. 1 nearly thrice as long as 2, and 2 scarcely longer 



than 3 ; frons moderately shining Mallochi Wood. 



— 1 at most half as long again as 2 or a little more, 

 and 2 much longer than 3; frons somewhat more 



to strongly shining 12. 



12. Frons broader than high 13. 



— Frons as high as broad or thereabout 14. 



13. Wings strongly brown, often with a cloud, fourth 

 vein evenly curved, strongest on the middle, 



pedunculated at the base in male 91. glahri frons Wood, 



— Wings slightly tinged, almost clear, costa thick- 

 ened in first division the thickening evenly 

 decreasing outwards, fom-th vein much curved 



in its first part, not pedunculated incrassata Schmitz. 



14. Palpi yellow or a little dusky; balteres with the 



peduncle yellow 92. propinqua Wood. 



— Palpi black ; balteres quite black ehenina Schmitz. 



15. Frons higher than or at least as high as broad 16. 



— Frons broader than high 18. 



16. Colour yellow (only male known) 95. ustulata Schmitz. 



— Colour black 17. 



17. Frons more or less shining; supraantennal bristles 



equal, the upper widely distant ; antennæ black . . 93. minor Zett. 



— Frons dull; supraantennal bristles very imequal, 



the upper not widely distant; antennæ brown. 94. angustifrons Wood. 



18. Bristles on hind tibiæ rather strong, not numerous . 96. uliginosa Wood. 



— Bristles on hind tibiæ less strong, more numerous 19. 



19. 1 not longer than 2, and thus distinctly shorter 



than 2 -f 3 20. 



— 1 longer than 2, and not or slightly shorter 



than 2 + 3 21. 



20. Antennæ yellow or red; costal cilia very short. . 97. flava Fall. 



— Antennæ blackish brown; costal cilia moderately 



short 98. mixta Schmitz. 



21. Three first joints on front tarsi simple 22. 



16 



