Descriptions of British Diptera. 159 
assumes the form of an interrupted white line in the female ; tho- 
rax shining black, with fine grey pubescence, having a white lateral 
line on each side extending from the shoulder to the insertion of the 
wing ; scutellum concolorous with the thorax ; abdomen of the male 
white, with the base black and a spot of that colour at the apex ; 
that of the female black margined with white, having a row of small 
white triangular marks down the middle, and another on each side ; 
the spots of the latter united to the white margin : thighs black with 
the apex white, all the rest of the leg of the latter colour, except the 
hinder tibiae, which are black in the middle ; wings vitreous, the 
costal nervures yellowish. 3 3], lines. (Wood-cut, Fig. 1st. <J> ) 
Found occasionally on flowers in marshes and damp meadows from 
May to August, probably inhabiting most parts of the country. 
" On Umbelliferae, common in Ireland." A. H. Haliday, Esq. 
2. NEMOTELUS PANTHERINLTS. 
Musca pantherina, Linn Nemotelus marginatus, Fdbr Nemotelus pan- 
therinus, Meig. ZweL iii. 115, pi. 25, fig. 20, <$. 
Very closely resembles the preceding in its general appearance, 
but is considerably less, seldom exceeding 2 or 2J lines. Head of 
the female without any white mark over the base of the antennae ; 
thorax pubescent, of a uniform black colour without any white marks; 
abdomen of the male white, with a black spot just before the apex ; 
that of the female black, with a single dorsal series of small white 
spots : thighs black, white at the apex ; tibiae white, with a brown 
mark before the apex ; tarsi entirely white. 2 2^ lines. 
Found with the preceding, but less frequently. " Near London," 
Stephens'* Caial. " Cambridge," Charles C. Babington, Esq. 
3. NEMOTELUS NIGRINUS. 
Nemotelus nigritus, Panzer, Fauna Germ. cvii. 17 Nem. nigrinus, Fallen, 
Diptera Suecicee Meig. Zwei. iii. 117. 
Considerably less than either of the preceding ; head shining black, 
antennae brown ; thorax with a yellow humeral dot, from which a 
yellow line extends to the base of the wings ; the other parts of the 
thorax and the whole of the abdomen shining black in both sexes ; 
halteres and legs white, slightly tinged with yellow ; thighs black, 
except at the apex ; anterior tibiae tinged with brown, the hinder 
pair nearly black. 1^ 2 lines. 
This likewise has occurred in the vicinity of London and in a few 
other places. " Bog of Allen ; Connemara ; Holy wood," A. H. Ha- 
liday, Esq. 
