348 Scientific Proceedings, Royal Duhlin Society, 



smaller than zosterce, have much shorter bristles on thorax, the bristle near root 

 of wing being the strongest ; while the notopleural bristle is not incurved, 

 tlie middle pair of prescutellar bristles are very small, and there are no distinct 

 bristles above hind tibiae. 



20. Limosina leucoptera Hal. — Described as follows under Section " AA. 

 Antennce in latera aversce " : — 



" Sp. 20. L. leucoptera. Nigro-fusca, alls albis, casta nlgricante. 

 " Dusky with paler legs : eyes small : arista with thick whitish 

 pubescence : scutel short, nearly semicircular : middle shanks bristly ; 

 2d joint of hind feet long and scarcely thickened : poisers brown : wings 

 whitish ; the costal nerve and those next to it dusky, the rest colourless ; 

 the costal region dusky towards the end : costal nerve with a few 

 bristles at the base, a little thickened from the 1st to the 2d main 

 nerve ; the latter ending much nearer to the 3d ; marginal cell long 

 and very narrow ; submarginal broad, not extending quite to the tip of 

 the wing : interval of the cross-nerves equal to the principal one. 

 (Rather less than No. 18.) 



" The examples which I have before me are not in good order, but 



the small eyes, the 2d joint of the antennae, which is very bristly, iiud 



the wings satisfy me that the species is better placed in this section than 



in A. Taken by Mr. Walker, near London." 



Two specimens in the Collection. It is a dull species with only one pair 



of dorso-central bristles developed on thorax. The cubital vein is evenly 



curved upwards to costa, and the wings distinctly whitish. 



21. Limosina nigerrima Hal. — Originally described in Ent. Mag. i. (1833), 

 where on p. 150 it is given as Borborus nigerrimiis n.s., while by a lapsus calami 

 the description on p. 178 is given under the name atenimus as follows : — 



" Borborus aterrimus. Atev, Iwlosericeus, alls albis, seta antennarum 

 albida. (Long. •04.) 



" Feet short, fore pair a little dilated : seta pubescent whitish : wings 

 opaque, milk-white : rib blackish, the other nervures inconspicuous." 

 This description was elaborated in 1836 as follows : — 

 " CO. Areola mavginalis perpana. 

 " Sp. 21. L. nigerrima. Atra velutina alis albis. 



" Borborus nigerrimus. Ent. Mag. i. 178. 



Curt. B.E. 469. No. 29b. 

 " Limosina minima Macq. S. a B. ii. 573. No. 9. 



