Aphiochaeta. 231 



tibiæ in male thickened, contracted at the 



base, without bristles on the ventral side. . 144. tibiella Lundbk. 



26. 1 double 2 + 3 or nearly so 27. 



— 1 not double 2 + 3, but distinctly shorter 32. 



27. Legs blackish; palpi dusky; hypopygium 

 without bristles (only male known) 146. cinerella Lundbk. 



— Legs yellow or when darker palpi yellow 28. 



28. Costa about 0,33 of the wing-length ; hypo- 

 pygium without bristles 29. 



— Costa longer; hypopygium with bristles 31. 



29. Black or dark species 30. 



— Yellowish species brachyneura Egg. 



30. Third abdominal tergite in female narrowed . . 133. pygmaea Zett. 



— Third abdominal tergite in female normal . 134. pygmaeoides Lundbk. 



31. Hypopygium with two bristles; thorax some- 

 times reddish 147. haUerata Wood. 



— Hypojjygium with four bristles (only male 

 known) 148. plurispinosa Lundbk. 



32. Male palpi large, almost nude; hind tibiæ at 

 the end with a small, not hairy longitudinal 

 keel dorsally to the hair-seam (only male 

 known) latipalpis Schmitz. 



— Male palpi and hind tibiæ ordinary 33. 



33. Hypopygium with bristles; thorax sometimes 

 reddish 34. 



— Hypopygium without bristles 36. 



34. Hypopygium with more than one bristle. . . 149. fuscohalterata Schmitz. 



— Hypopygium with only one bristle 35. 



35. Size 1,2 mm or above 150. pallidizona Lundbk. 



— Size below 1 mm ledburiensis Brues. 



36. Supraantennal bristles large and equal; hy- 

 popygium white 151. albicaudata Wood. 



— Supraantennal bristles unequal; hypopygium 

 not white 37. 



37. Sixth abdominal segment in male with long 

 bristles (only male known) 152. spiuicincta Wood. 



— Sixth abdominal segment in male without long 

 bristles 38. 



38. Wings somewhat dark 153. sylvatica Wood. 



— Wings nearly clear 39. 



39. Costal cilia long; hypopygium large, some- 

 what cylindrical (only male known) 154. laeta Lundbk. 



— Costal cilia moderately long; hypopygium 

 small exigua Wood. 



