180 [January, 



It is very difficult to say what is meant by a " new British species " 

 of Diptera in the present confused state of our lists, as many species 

 which w^ere well know^n to Curtis and Stephens were omitted by 

 Walker, whilst many described by Walker were incorrectly named ; 

 these, when recorded as British, are not strictly new species, but yet 

 they would probably be omitted by any one endeavouring to ascertain 

 the geographical distribution of species. 



1. Sciara carhonaria, Mg. : this is undoubtedly the S. morio of 

 Walker, and possibly Meigen, but not recognised as such by Winnertz 

 in his Monograph of the Sciarincd. It is abundant on lime trees in 

 my garden about the middle of May. 



2. Boletina trivittata, Mg. : taken at Lynton, Ivybridge, Loch 

 Maree and Tongue, in June. 



3. Bymosia truncata, Winn. : on my study window, January 14th, 

 1884. 



4. Scatopse tristis, Ztt. : I took a specimen at Lyndhurst, on 

 June 18th, 1869, which both Loew and I made out to be this species. 



5. S. incompJefa, n. sp. : two specimens of this occurred at Abbey 

 Wood on August 15th, 1869 ; Loew returned one with " novam credo " 

 attached to it. 



It is a rather small species ; thorax dullish black ; abdomen shining black ; 

 wings with a very distinct venation, the second vein extending far beyond the 

 middle of the costa, hence second costal space nearly one and a half times as long 

 as first, this second vein curves a little into costa at its end; the forked vein starts at 

 the transverse veinlet, and the forks are about the same length as the peduncle, but 

 both forks vanish entirely before they reach the edge of the wing ; the last vein is 

 considerably twisted ; the wings are altogether very much darkened. I know no 

 species to compare the venation with at all ; S. jcwZicaWa, Lw.,has clear wings, short 

 peduncle of forked vein, and complete forks. 



6. S. transversalis, Lw. : this w^ell-marked though rare species 

 occurred freely on a tree near Thetford on June 17th, 1880. 



7. >S'. inermis, Huthe : I find this a very common species and very 

 widely spread, having taken specimens at Exeter, Cambridge, Winder- 

 mere, and Gairloch. I expect most of Walker's S. soluta belong to 

 this. 



8. S. recurva, Lw. : this species is very common, especially in 

 gardens. 



9. S. suhnitens, n. sp, : on May 11th, 1868, 1 took three specimens 

 of this on a tree-trunk at Denmark Hill, and thought they seemed 

 distinct from S. recurva, but had considerable doubt, desiring more 



