PSYCHODA. 221 



2. Wing with the membrane closely covered 



with hairs, as well as the veins, the hairs 

 placed much more long-itudinally than in 

 the species of section 7, giving a longi- 

 tudinal appearance to the wing-vestiture 

 instead of a '' criss-cross " network one . . 3. 

 Wing with the hairs on the veins only, 

 arranged in two divaricate depressed 

 rows, one on each side, and nearly alwaj's 

 overlapping those of the contiguous veins, 

 presenting a " criss-cross " appearance 

 over the whole wing. No hairs whatever 

 on the surface of the wings. No obvious 

 scales, except those forming the small 

 spots 7. 



3. Distinct spots at least near the margin of 



the wing, white or black or both, com- 

 posed of small scales or stiff hairs 4. 



No distinct spots at or near the wing- 

 margin. With or without two transverse 

 narrow bands of grey scale-like hairs . . 6. 



4. The white spots on the wing chiefly con- 



fined to the border, or the forking of the 



2nd and 4th longitudinal veins 5. 



The white spots (20 or more) distributed 



irregularly along all the veins, giving the p. 223. 



entire wing a spotted appearance maculipennis, Brun., 



5 (). Anterior branch of 2nd longitudinal 



vein forks opposite fork of the 4th vein. 



A few scales near the base of the wing. 



The small white scaly hair-spots placed 



at the tip of each vein, wherever they [p. 224. 



occur albonotata, Brun., 



(b). Anterior branch of 2nd longitudinal 



vein forks a little before the fork of the 



4th vein. The white spots composed of 



white hairs, not scales, and placed between 



the tips of the veins, not at the tips .... distincta, Brun., p. 225. 

 (c). Anterior branch of 2nd longitudinal 



vein forks near middle of wing, a little 



beyond the fork of the 4th vein. All 



three terminations of the 2nd and that of 



the 3rd vein with a pair of small spots 



placed very closely together, composed 



of a few elongate yellow bristly hairs. 



Lower branch of 4th vein, and the 5th 



vein, at their tips with conspicuous black 



hair-spots decora, Brun., p. 226. 



6. Wing with two transverse bands of grey [p. 226. 



scale-like hairs , transversa, Brun., 



Wing wholly unmarked hirtipennis, Brun., 



7. Wing with distinct black hair-spots at the [p. 227. 



tips of many or all of the veins 8. 



Wing without hair -spots at tips of 

 veins . 12. 



