Descriptions of Britisli Diptera. 
155 
labrum short and horny, 
pJaced at the base of the la- 
bium, the apex notched (Fig. 
2, b ;) palpi triarticulate, 
the third joint ovate, pu- 
bescent, (Fig. 2. a ;) scu- 
tellum semicircular, armed 
with two spines. 
The genus Clitellaria of Meigen corresponds to that named Ephip- 
pium by Latreille. The former of these authors includes in it the 
Nemotelus mllosus of Fabr. and two other species which are desti- 
tute of spines both on the thorax and scutellum, besides differ- 
ing in some other particulars from the insect described below. As 
it seems improper to associate species so dissimilar in structure, the 
genus has been defined above, so as to restrict its application to the 
kinds provided with a spinous scutellum, all of which, with a single 
exception, are exotic. The name used by Latreille may be applied 
to the others. 
1. CLITELLARIA EPHIPPIUM. 
Musca ephippium, Gmelin, Donovan, xvi. pi. 559 Stratiomys ephippium, 
Fabr Ephippium thoracicum, Latr. Gen. iv. 276 Clit. Ephippium, 
Meig. Zwei. iii. 122, Stephens, Catal 
Head black, the female with two small white spots on the fore- 
head ; thorax clothed with silky pubescence of a bright-red colour, 
the breast and sides black ; before the insertion of the wing on each 
side, there is a pretty long projecting spine ; scutellum and its two 
spines, likewise the abdomen and legs black ; halteres yellow ; wings 
reddish-brown. 4^-5 lines. ( See Fig. 3 of the above cut.} 
This insect is apparently scarce in Britain, but it is sometimes 
found near London. " Coombe Wood by George Milne, Esq. Kent," 
Donovan, I. c. 
GENUS OXYCERA, Meig. 
Antennae rather shorter than the head, approximating at the 
base, but diverging anteriorly, the two first joints nearly equal, 
subcylindrical, somewhat 
widened at the apex, and 
pilose, the third as long as 
both the others, tapering 
to the extremity, and di- 
vided into four rings, the 
apex with a two-jointed 
style, generally inserted on the back just before the summit, (Fig. 
