34 
DIPTERA 
of its fork situated some distance beyond basal cell R, branches slightly divergent; cubitus unbran- 
ched ; anal vein wanting (PI. 3, Fig. 24). 
Type species : P. triangula, Marshall. 
Geographical distribution of species : 
I. P. triangula, Marshall, Trans. New Zeal. Instit., Vol. 28, iSgS, p. 284, New Zealand, 
pi. 10, f. 2; pi. i3, f. 8, 9 (1896). 
3. Genus EUDICRANA, Loew 
Eudricrana, Loew, Berl. Ent. Zeitschr. Vol. i3, p. 142 (1869). 
Characters. — Lateral ocelli contiguous to the eye margin, the middle ocellus absent. Legs, 
slender; tibial setae moderate; spurs long. Wings large, of moderate width and rather hairy; costa 
produced beyond the tip of R^_l_5 ; subcostal vein ends in the costa; Scj (subcostal crossvein) present; 
cell R (basal cell) rather short; cell Rj elongate; cells in the forks of media and cubitus very long^ 
acuminate at the base, the latter forks proximad of the R-M crossvein; first anal vein subobsolete, second 
strong and rather longer than usual with the Sciophilinae, third long but indistinct. 
Type species : E. obimbrata, Loew. 
Geographical distribution of species : 
T. E. obiimbraia, Loew, Berl. Ent. Zeitschr. Vol. i3, p. 141 (1869). New York (North America).. 
4. Genus TETRAGONEURA, Winnertz 
Tetragoneura. Winnertz, Stett. Ent. Zeit. Vol. 7, p. 18 (5) (1846). 
Characters. — J-lead spherical, flattened in front, placed low upon the thorax; eyes circular, 
bulging; ocelli three in number, placed in a curved line upon the broad front, the middle one smaller 
than the laterals; palpi incurved, four jointed, the first joint very small, the fourth long, filiform; 
antennae arcuated, projecting forward, 2 + 14 jointed, the first two differentiated, both long setose at the 
apex, the flagellar joints cylindrical, slightly compressed, short pilose. Thorax oval, highly arched;, 
scutellum small, truncated behind, long setose; metanotum highly arched. Abdomen seven segmented, 
cylindrical in the male, with short forceps; in the female somewhat compressed, terminating in an 
ovipositor with two lamellse. Legs moderately long; femora compressed, all tibiae with lateral seta;. 
Wing somewhat longer than the abdomen, microscopically setulose, oval, with more or less rounded 
base; costa produced far beyond the tip of R4+5, but not quite reaching the tip of the wing; subcosta 
short or long, ending in the costa, or free, or in Rj ; Rj ending in the costa beyond the middle of the 
wing; Sca (subcostal crossvein) wanting; the small cell (Rj) somewhat elongate, beyond the middle 
of the wing; the R-M crossvein elongate, very oblique, almost longitudinal in position, appearing 
like the beginning of a longitudinal vein; petiole of the media moderately long; cubitus forking 
either near the base of the wing or somewhat distad of this point; anal veins rudimentary (PI. 3,. 
Fig. 25, 2 6). The larvae have been found in rotten wood and in fungi. 
Type species : T. sylvatica, Curtis. 
