CoLUN — Notes on Specimens of Borhoridce and some Efhydridce. 237 



5. Sphcerocera scabricula Hal. — Originally described as follows : — 



"Sp. 5. Sph. sciibricula. Briinnea, abdomine nigra. 



"Head and thorax chestnut-brown, opaque, very thickly shagreened, 

 and set witli minute wliite points, lying flat : head very long : eyes small : 

 arista whitish : teeth of the seutel very sharp, decurved : abdomen black : 

 legs short, set with very minute whitish bristles, light brown, with the 

 knees and feet paler : hind thighs of the male not thickened : feet very 

 short ; let joint of the hind pair as long as the next three together : 

 wings whitish hyaline, with pale ferruginous nerves ; the costal brown : 

 they are shorter than in No. 4, and the rib is finely ciliate. (Length f ; 

 wings 1| line.) 



" Found near London by Mr. Walker." 



Two specimens in the box containing the Borboridce and some more in 

 another part of the Collection. A remarkably distinct species, easily recognized 

 from the description. Haliday's description was made from rather immature 

 specimens, as stated in Ann. Nat. Hist., 1838, p. 188. He placed it as a 

 synonym of pusilla Fin. in the Errata to Walker's Ins. Brit. Dipt. III., and 

 it is so dealt with in the Palsearctic Catalogue, but this must be a mistake. 

 Rondani redescribed it in 1880 under the name pallidimana. I caught two 

 females on a stable window here at Newmarket (England) on April 8th, 1896. 



BORBORUS. 



1. Borborus nitidus Meig. — Several specimens of this not uncommon 



2. Borborus suillorum Hal. — Described under Sections " A. Tibm posticm 

 calcari insfrticke," and " B. Tibim medke extrinsecus setigerce" as follows : — 



" Sp. 2. B. suillorum. Niger nitidus, Judteribus albidis ; alisferrugineis, 

 nervis transmrsis infuscatis. 



" Mycetia tibialis, Bob. D. 806. No. 2. 



" Very like the last : the bristles on the outside of the middle shanks 

 are much finer ; the legs more slender ; the thighs of male unarmed, 

 and only the fore pair thickened ; the 2d joint of the hind feet slender : 

 the posterior coxse, the trochanters and feet, and the extreme base of the 

 slianks, are rust-brown, the fore and hind feet darker : the cross-nerves 

 of the wings are constantly suffused with brown. (Length 1 J ; wings 

 3 lines.) 



"Inhabits fungi in England and Ireland, but is rather uncommon. 

 I cannot determine whether Macquart's 9th species may not be the same, 



2 p2 



