species. The following are recorded as British, but I have 

 seen the male only of one, and the females of three of the 

 species. 



1. fenestralis Linn. — Schell. tab. I3.f.l.2. 



Black, costa fuscous, halteres white, legs pale ferruginous, 

 tarsi fuscous : male with 3 or 4 white stripes across the ab- 

 domen : 2~ lines. 

 Beginning of June, Oxford. 



2. sulcicoUis Meg. — Meig. v. 4. p. 114. n. 5. 



" Black, legs rufous, halteres white, thorax foveolated be- 

 fore : 2 lines." 

 In the neighbourhood of London. 



3. vitripennis Meig. 115. 6. 



" Black, legs rufous, halteres fuscous, club white beneath, 

 wings hyaline: l^ line." 



4. senilis Fab. — Meig. 



" Black, legs rufous, halteres fuscous, club white beneath, 

 face black opake, with 3 smooth lines : 2^ to S lines." 

 End of June, Coombe Wood ; July, Thetford. 



5. domesticus Meig. 1 1 6. 8. 



" Black, halteres fuscous, club white beneath, legs rufous, 

 posterior thighs and tibiae blackish, face opake with 3 smooth 

 lines : 2 to 2^ lines." 



6. niger DeGeer. — tarsatus Panz. 98. 20. 



*' Black, legs black, tarsi rufous, posterior tibiae clavate, 

 halteres fuscous, club white beneath : 2 lines." 

 Found on Mentha sylve&tris : June in houses near woods in 

 the vicinity of London. 



7. rugosus Fab. — Curt. Brit. Ent. pi. 609. ? . 



June on a window at Niton in the Isle of Wight, and end 

 of same month on a Laurel leaf in a garden near Bristol. 



8. nigripes Meg. — Meig. 117. H. 



" Black, halteres fuscous, club white beneath; legs black, 

 tarsi fuscous : 2^ lines." 



For specimens of the Crocus aureus I am indebted to Lady 

 Blake, who transmitted them from Barton in Suffolk. 



