222 [October, 



Sp. 6. — S. SUILLA, F. 



spurca, Mgn. 

 This closely resembles S. analis in size, form, and colour, but differs bj having 

 the third antennal joint quite rufous, the shoulder points and tip of the scutellum 

 yellow, the hinder edges of the abdominal segments blackened, the wings with both 

 the transverse veins equally clouded, and the legs without any bristles, and with 

 few hairs. Length, 5 — 6 mm. Rare. 



Sp. 7. — S. LUTAEIA, F. 



This yellow species somewhat resembles -S. scylalaria, but is smaller, has the 

 arista black instead of rufous, and the long veins parallel instead of convergent ; 

 the thorax is brown, covered with yellow tomentum ; the shoulder points and the 

 scutellum are yellow ; the abdomen is yellow, indistinctly marked witli longitudinal 

 and transverse stripes, and covered with numerous yellow hairs ; the wings have 

 the long veins parallel, and the cross veins clear ; the legs are yellow, with scattered 

 bristles and hairs. Length, 8 — 9 mm. 



This species has so many characters in common with the two preceding, that 

 they have all three been looked upon as identical by Rondani ; and they vary so 

 much, and there are so many intermediate forms, that it is sometimes difficult to 

 discriminate them. The last described {S. lutaria) is by far the most common 

 variety, if they are to be looked upon as the same species. Generally distributed. 



Sp. 8. — S. INQUINATA, Mgn. 

 This common species also closely resembles the last {S. lutaria), but differs by 

 being smaller, more grey in colour, and by having the shoulder points and scutellum 

 (except the tip) grey ; the wings are flavescent, with parallel veins, and have the 

 cross veins slightly clouded ; the abdomen is dark brown, with a yellow apex, and 

 covered with a few pale hairs ; the legs are yellow, with scattered spines and yellow 

 hairs. Length, 7 — 8 mm. Very common. 



Sp. 9. — S. EXiMiA, Hal., Curtis. 



Curtis* briefly describes this species as being similar to S. inquinata, with the 

 exception of having the third and fourth long veins rather convergent at the apex of 

 the wing ; it was found by Mr. Ilaliday at Holywood, in Ireland. 



Sp. 10. — S. FONTANALis, Rnd. 



This differs from all the other species in this genus by having the palpi black. 

 It is dark grey in colour, the frontalia are fuscous, with a yellow tinge in front ; the 

 antennas are black, with long and slightly pubescent arista ; the face is white, with 

 slightly projecting epistome ; the oral setse are long ; the thorax has three sub- 

 distinct dark stripes ; the abdomen is dark grey ; the wings are slightly flavescent ; 

 the legs are black and setose. Length, 4 mm. I found a female (Rondani did not 

 know the male) of this rare fly at Windermere in 1892. 



Sp. 11. — S. BIPUNCTATA, Mcq. 

 Macquarfc describes this species as being cinereous, having the palpi yellow, 

 * Brit. Ent., 405. 



