1886.] 257 % [Hagen. 



of subcostal space ; it lies only between two costals and is only 

 half as long as those ; subcostal space with a very faint, brown- 

 ish hue. 



Hind wings less than three times longer than the body ; the 

 basal three-fifths ve^ narrow, with a faint, yellowish hue and a 

 dark band at the end ; veins blackish at base, beyond pale ; the 

 other apical two-fifths slowly enlarging, the first and nearly the 

 last third snow white, the middle one black with blackish veins ; 

 its basal half is somewhat more enlarged, 3mm., with curved mar- 

 gins, the other part with straight margins ; the white tip of the 

 wing is a little shorter than the preceding black part, triangular, 

 on both sides the margin with a slight excision, the tips 

 pointed. 



It is rather risky to describe a new species from the Cape of 

 Good Hope, but I am unable to unite N. gracilis with any of the 

 described ones. The long, narrow abdomen recalls N. tipularia 

 Westw., but the coloration is very different, the legs are not short, 

 the fore wings not narrow, and the black band of the hind wings 

 is not divided by a white, longitudinal band, though otherwise 

 similar to N. gracilis. N. albistigma Westw. has a different col- 

 oration, the abdomen short and thick, the front wings with a white 

 pterostigma and the hind wings with the white tips much longer 

 than the preceding black part and not dilated and excised at its 

 base. There are no other species known with which N. gracilis 

 can be compared. It is remarkable that N. gracilis is, in some im- 

 portant characters, similar to Stenotaenia Walkeri M'Lachl. 1 



8. Nemoptera halter ata Forsk. 



Panorpa halterata Forsk., Descr. Animal., p. 97, Icon., pi. 25, f. 

 E. 



A copy of this figure is in the Encycl. meth., pi. 98, f. 1, 

 named Le Panorpe d'Orient. Forskal represents a male ; the ap- 

 pendages are visible, and noted in the description, "chela (flava) 

 bifoliata." Ala ant., 26mm. ; al. post., 56mm. ; long, corp., 

 19mm. ; long, ant., 22mm. 



The dimensions given in the descriptions are considerably larger, 

 and as some characters of the description (oculi coerulei, pupilla 



1 The author will have to change the name Stenotaenia, because it has been used 

 for a worm by Gervais, 1871, Compt. Rend., Vol. 71, p. 780; cf. the Zool. Record for 

 1871. 

 PROCEEDINGS B. S. N. H. VOL. XXIII 17 JUNE, 1SS6. 



