236 PSYCHODID^:. 



3. Lower branch of 4th longitudinal vein with 



a distinct appendix at its basal angle. 

 Antennae of male with six prominent erect 

 spines on the upperside of the 1st flagellar 

 joint, which is considerably lengthened. 

 Antennae of female without such spines, 

 the 1st flagellar joint riot abnormally [p. 238. 



lengthened spinicornis, Brun., _ 



Lower branch of 4th longitudinal vein with- 

 out such appendix at its basal angle. 

 The 1st flagellar joint not abnormally 

 lengthened in either sex, and always with- 

 out the prominent spines 4. 



4. Wing with small but distinct spots at the 



tips of many or all of the veins, composed 

 of black or white hairs, scale-like hairs, or 

 true scales, often a black and a white spot 

 both present at the tip of the same vein . . 5. 

 Wings without distinct hair- or scale- spots 

 at tips of veins. Hairs on veins long 

 enough to overlap those of the adjacent 

 veins. No white scale-spots on wings . . 10. 

 o. A distinct section of the marginal fringe at 

 the tip of the wing composed wholly of 

 white or whitish hairs. The 2nd longi- 

 tudinal vein forks before the base of the 



3rd vein 6. 



No distinct section of white hairs in the 

 marginal fringe at the wing-tip 7. 



6. Metatarsus normally black, except for an apical 



fringe of small white scales. Marginal 



fringe of wing with sections composed of [p. 240. 



grey or whitish grey hairs marginmotata,Bnm., 



Metatarsus with at least the apical half 

 covered with whitish scales.* Marginal 



fringe of wing with only one arc of whitish [p. 243. 



grey hair, which is apical . metatarsalis, Brun., 



7. Distinct bright yellow hairs in short sections 



on the veins, these sections so situated as 

 to form an irregular transverse line from 

 the costa to near the distal end of the 

 posterior margin. Costa with very thick 

 black bristly hairs. The 2nd longitudinal 

 vein forks beyond the base of the 3rd 



vein mixta, Brun., p. 244. 



No distinct sections of bright yellow hairs on 

 the veins, any hairs of such colour being 

 isolated and exceptional. Costa with only 

 normally black or blackish hairs, with 

 some sections of lighter coloured hairs . . 8. 



8. Tarsi (apart from metatarsi) wholly white . . 9. 

 Tarsi black; apical third of fore metatarsi 



and tips of posterior metatarsi with small [p. 245. 



white scales proximo., Brun., 



* In two out of the three specimens present before me it is wholly covered 

 with the whitish scales, except rather narrowly at the base. 



