158 Descriptions of British Diptera. 
with a white spot^before the ocelli ; thorax with a lateral line of 
sulphur-yellow on each side extending to the base of the wings ; 
scutellum and spines sulphur- yellow ; anus with a semicircular 
pale-yellow spot ; halteres whitish ; legs reddish-yellow, the hinder 
thighs brownish before the apex. 2J lines. 
" Glanville's Wootton." 7. C. Dale, Esq. 
6. OXYCERA ANALIS. 
Meig. iii. 130 ; Megerle. 
Somewhat larger than the preceding, to which it is very similar : 
antennae entirely black ; thorax with a yellow lateral line, the scu- 
tellum and a mark above the anus of the same colour; wings with 
a fuscous spot ; thighs entirely black, except a small portion at the 
apex, the hinder tibiae marked with a dark-brown spot. 2f lines. 
" Mullet's Copse ; Glanville's Wootton." J. C. Dale, Esq. 
GENUS NEMOTELUS, Geoff. 
Antennae nearly as in Oxycera, the two first joints being almost 
equal, the third elongate, divided into four rings, and having a short 
two-jointed style at the extremity, (Fig. 2 ;) inserted at the apex of 
a conical hypostome projecting in the form of a beak, and covering the 
proboscis, which is long, 
slender, geniculated and 
without distinct lobes ; la- 
brum long, narrow, and 
pointed; palpi very mi- 
nute, if they exist at all ; 
thorax subquadrate ; abdo- 
men oval, scarcely wider than the head ; scutellum unarmed ; hal- 
teres uncovered. 
The short conical beak readily distinguishes this genus from others 
of the family. The species are rather of small size, few in number, 
and frequent marshy places|; the larvae probably inhabiting stagnant 
pools. As in most of the allied genera, the sexes are distinguished 
by the size of the eyes, those of the male being large, and meeting 
at their inner edges, while in the female they are smaller, and se- 
parated from each other by a considerable space. 
1. NEMOTELUS ULIGINOSUS. fs.J 
Musca uliginosa, Linn. ; Donovan, xv. pi. 519. Nemotelus uliginosus, Fabr. ; 
Meig. Zwei. iii. 114, pi. 25, fig. 19, ?. 
Head black, with a white spot over the antennae in the male, which 
