144 AN ACCOUNT OF BRITISH FLIES. 
the larvee as having four large posterior segments and the remainder 
of the body, leech-like, marked by numerous annulations. Boscs* 
describes an American species, but talks of its body as having distinct 
segments. This does not answer to Dufour’s description of the leech- 
like body. 
There is only one species found in England, as far as we know. 
C. lineatus, F. = P. laticornis, Mg. 
Tawny. ‘Thorax tawny, with three brown longitudinal stripes; 
pectus brown; metathorax brownish. Abdomen blackish-brown or 
black ; there is a yellowish band with a spot on each side on the 
anterior borders of the third, fourth and fifth segments ; hypopygium 
brown ; ovipositor and lamellz yellow. Head brown, proboscis and 
palpi yellowish. Antennz broad, brown, testaceous at base, about 
as long as the head and thorax. Legs yellow; base of tibiz and 
tarsi brown, also base of femora ; metatarsi of the anterior legs longer 
than tibize ; spines and spurs of the latter brown. Wings shorter than 
the abdomen ; grayish, with apex brown, also a. brown spot near the 
centre and one below at the posterior border of wing. Length 34 to 
3% lin. 
Walker describes P. /ineata F., and P. daticornis. The latter is most likely the 
3 of dineata. He gives the length as 5 and 4 lin. P. (C.) daticornis is figured, 
pl. xxiii., fig. 5. This figure resembles P. (C.) dineatus F. 
SECTION 5.—Macrocerine. 
Antenne very long, filiform, 16-jointed ; may be three times as 
long as the body, longer in ¢ than in the 2. Body slender, pubes- 
cent. Head small, ocelli three, eyes nearlyround. Labiumi forming 
two large pubescent lobes. Palpi 4-jointed, second smaller than the 
pew i eee 
Fic, 30.—Antenna of a Macrocera, 2. 
first, fourth fairly long. Thorax short and elliptical. Abdomen 
cylindrical in @; elongate, fusciform in 2. Legs long and slender ; 
tibiz without spines; their spurs very small. Wings moderately 
* Dict. d’Hist. Nat., vol. iii., 1823. Figure of larva in the second edition of 
_ same, Tab. B. 21, fig. 4. 
