156 AN ACCOUNT OF BRITISH FLIES. 
Tipula latrinarum, Deg. 
T. scatopse, Gmel. 
T. albipennis, ¥. 
SS. decemnodia, Scop. 
S. nigra, Geoff. 
S. punctata, Mg., Zett. 
S. notata, L. = 
Black and shiny. ‘The thorax and scutellum, and sometimes the 
abdomen, have a whitish, yellow or yellowish-brown stripe; this 
marking is not, however, always present. Antennz deep black. 
Legs deep black ; tarsi black or brown; the metatarsus of the hind 
leg in the ¢ is very short, hardly half as long as the next tarsal joint. 
Halteres yellowish-brown. Wings limpid; the third longitudinal 
vein joins the costa at its extremity, viz., at about two-thirds of the 
length of the wing; the costal, first, second and third veins dark, rest 
pale ; the fourth forked, petiole of fork long and curved gently down- 
wards, arising from the third slightly nearer the base than the trans- 
verse veinlet ; sixth vein very undulating. ‘There are slight indica- 
tions of a transverse veinlet running from the upper branch of the 
fork to the third vein. Length 1 to r4 lin. 
This is an abundant species, and may be found from May to 
September in very varied places, such as on flowers and on windows, 
especially in conservatories. I have also found them very abundant 
flying over open drains and foul ditches in Cambridgeshire. At 
certain times this fly is very abundant and appears in swarms. 
Walker says: “ They occasionally dwell in clusters beneath the bark 
of pales.” The larve live in rank farmyard manure and also in 
decaying vegetable matter. Large numbers of this fly may be taken 
flying over the former. I have especially noticed this in the early 
spring. 
S. scutellata, Lw. = S. picea, Hoff., WIk. 
Deep black ; thorax yellowish on each side, also sometimes the 
sides of the abdomen. Antennz black. Legs blackish-brown. 
Bases of tibia pale. Halteres pale. Wings limpid ; second longi- 
tudinal vein about one-third length of wing ; third joins costal at its 
apex on the upper border of the wing. The above veins tawny, 
dark. Fourth forked, fork narrow; eighth nearly straight ; sixth 
very slightly undulating and a rudiment of a seventh vein present. 
Length 1 to 1 lin. | 
An abundant species, and appears often in great swarms in the 
oak and other trees, feeding on the honeydew of the green fly in the 
autumn. 
