Studies on Tipulidae II. 217 
The legs are long and slender, with an almost imperceptible 
pubescence; the spurs at the end of the tibiae are very distinctly 
seen under a magnifying power of 100 to 150. The ungues and em- 
podia are exceedingly small. 
The wings are of a moderate length and breadth; the venation 
has been partly described above; the stigma is well defined, oval, 
placed at the end of the first vein. The praefurca has very little 
curvature at the base, and is not much longer than the petiole of 
the fork of the second vein; the second submarginal and first posterior 
cells are of equal length, their bases being nearly on the same line; 
the sides of the first posterior are almost parallel; the structure of 
the discal cell shows that it is formed by the forking of the posterior 
branch of the fourth vein, connected by a crossvein with the anterior 
branch; the great crossvein is at the bifurcation of that posterior 
branch, and thus a little beyond the middle of the discal cell. 
The genitals of the male are very large and club-shaped, resem- 
bling those of a Tipula more than those of a Limnophila. The 
following is the description of the forceps of P. claviger, as I do 
not possess the male of the other species: 
The last upper abdominal half-segment is uncommonly large and 
convex; two large basal pieces of the usual shape, bearing a small, 
curved, pointed rostriform appendage at the end, and some branched 
and hairy inner appendages; on the under side of the forceps, and 
entirely detached from it, is a very characteristic yellowish-white 
elongated foliaceous appendage, folded lengthwise and bifid at the tip. 
The two species described by me are from California. 
Ulomorpha. 
O0. Sacken, Monographs etc. IV, p. 232; 1868. 
A Limnophilid with four posterior cells and finely pubescent wings. 
A north-american and perhaps a european species (Limnophila pi- 
licornis Zett. Dipt. Scand. X, p. 3885) are known. 
Trichocera. 
Meigen, in Illiger's Magaz. 1803; O. Sacken, Monogr. etc. IV, 
p. 233; Tab. 2, f. 13, wing. 
Most of the Trichocerae hitherto recorded belong to arctic and 
temperate regions. Mr. Mik (Verh. Z. B. Ges. 1881, p. 200) described 
a species from Auckland Islands in the Southern Pacific. The genus 
seems to be rare in California; during my whole residence there, from: 
December till July, I came across a single specimen only (7. tri- 
choptera 0. S. West. Dipt. p. 205).. However 7. ocellata Walk. 
