928 CHARLES Paut ALEXANDER 
sordidly yellow and black, with the surface shiny. The antennae of 
the male are submoniliform with the segments heart-shaped, as shown 
in figure 125, 1 (page 850). The larva, which has been discussed by the 
writer in another paper (Alexander, 1914 a), lives in certain terrestrial 
mosses (as Hypnum). It is bright green in color, with darker stripes on 
the sides, and closely simulates the appearance of its host plant, the 
illusion being heightened by the spines and excrescences that cover 
the body. 
Liogma nodicornis (O. 8.) 
1865 Triogma nodicornis O.S. Proc. Ent. Soc. Phila., vol. 4, p. 239. 
1887 Liogma nodicornis O. 8. Berl. Ent. Ztschr., vol. 31, p. 226. 
Liogma nodicornis is a common fly in Canadian conditions thruout 
North America. In color it is mainly yellow, the head black and shiny, 
the thorax yellow with three more or less confluent shiny black stripes 
on the dorsum, the pleura with one or two large black blotches. The 
venation (Plate XXX, 5) is somewhat variable, especially in the fusion 
of Rit; on M,+., these being in some cases broadly fused (as shown 
in figure 128, 1, page 862), in other cases with the cross-vein r-m apparent. 
SUBFAMILY Tipulinae 
Tribe Dolichopezini 
The genera of the tribe Dolichopezini may be separated in accordance | 
with the following key: | 
1. Tip of vein R: atrophied; Rs very short, transverse, simulating a cross-vein; second anal | 
vein long, about two-thirds the length of the first; Sc moderate in length, enemas | 
WR eee alone Biavaie shasta tate CEES tose acavers seeulley sel ale ede ee Eee ne eee 
Tip of vein R: present, the vein almost perpendicular to R2+s at its origin; Rs long, oe | 
arcuated at its origin; second anal vein very short, about one-third the length of the | 
first; Sc very long, ending in costa...................2-. Brachypremna O.S8. (p. 923) | 
2. Cell 1st M2 lacking; basal deflection of Cu: in a long fusion with M, breaking away 
before:the fork Olli se NGA NA are VE SAURAT,, ere cg MO Dolichopeza Curt. (p. 929) | 
Cell ist M2 present; basal deflection of Cu: in punctiform contact with Ms+,4 beyond | 
ther fork oh Ma a AUR RANI PIC UERS eg SE FAA ea a Oropeza Needm. (p. 929) | 
Genus Brachypremna Osten Sacken 
1886 Brachypremna O. 8. Berl. Ent. Ztschr., vol. 30, p. 161. 
The genus Brachypremna includes but seven described species, all of | 
which are tropical American. A single species, B. dispellens, ranges | 
