244 Scientific Proceedings, Royal Dublin Society. 



" Approaches the last in character : the marginal aud sub-marginal 

 cell of the wings are much narrower, the cross-nerves less distant : the 

 legs sometimes are entirely ferruginous ; in others the thighs and the 

 middle of the shanks are pitchy ; or the legs are blackish, with the 

 knees and feet ferruginous : wings brownish, with distinct brown nerves, 

 the costal not incrassate: from the following it differs by the wings, the 

 2d joint of the hind feet not thickened, &c. ; but I am not satisfied that 

 all these varieties belong to one species, or that some of them may not 

 connect the present with the last." 



The only specimens in the collection at all answering to this description 

 are two males of rufilabris Stenh., which would represent Haliday's dark 

 legged form ; true erratica I feel convinced must be a synonym of fenestralis 

 Fin, as defined by Zetterstedt and Stenhammer. 



13. Limosina clunipes Meig. — This species with its reddish-yellow base to 

 anteunse, reddish-brown pleurae and cubital vein straight (almost bent 

 downwards towards tip), can hardly be confused with any other ; puenila 

 End. might well be considered a synonym, were it not for Rondani's state- 

 ment, " Halteres pallidissimi." There were five specimens in Haliday's 

 Collection. 



14. Limodna spinipennis Hal. — Originally described as follows : — 



" Sp. 14. L. spinipennis. Nigra pubescens halteribus nigris ; alia 

 denigratis, casta incrassala, basi spinigera. 



" Epather dull black : face elevated between the antennae : arista 

 with thick black pubescence : thorax thickly pubescent : more bristles 

 on the middle shanks than in L. fungicola ; 2d joint of the hind feet 

 scarcely thickened : poisers black : wings blackish : costal nerve 

 thickened along the middle, somewhat bristly at the base, with a long 

 erect spine springing near the root : 2d nerve ending half way between 

 the 1st and 3d ; interval of cross-nerves rather longer than the principal 

 one : size of No. 18. 



" Occurs but rarely, in company with No. 6." 



Very distinct by reason of tlie spine at base of costa. Three specimens 

 in the Collection. 



15. Limosina heteroneura Hal. — Described as follows : — 



" Sp. 15. L. heteroneura. Nigra, facie pedibtisque ferruginosis ; alis 

 infuscatis, nervis transversis fere conUguis. 



