Crane-flies 7 c 
Rostrum and palpi dark brownish black. Antennae black, the flagellum 
broken. Head small, dark brown, somewhat paler laterally. 
Mesonotal praescutum pale brownish grey with three dark brown, very 
distinct, stripes, the median one broadest in front, narrowed behind, and ending 
before the suture, very narrowly bifid behind; lateral stripes shorter and narrower 
crossing the suture and suffusing the scutal lobes; scutellum and postnotum 
dark brown. Pleura dark blue-grey pruinose. Halteres light brown, the 
knobs darker. Legs with the coxse sparsely pruinose; trochanters dark brown; 
remainder of the legs very dark brown, only the fore femora a little brighter at 
the extreme base. Wings subhyaline; stigma rather indistinct, pale brown; a 
darker brown spot on the r-m crossvein and the basal deflexion of vein R i +5; 
vein Cu indistinctly seamed with darker; veins brown; venation (PI. I, fig. 4) 
crossvein r near the tip of Ri; vein i^ ^ + 5 a little longer than the very short 
fork. 
Abdomen elongate, blackish, with numerous, scattered, appressed golden 
hairs; basal tergites with a transverse linear impressed area before mid-length 
of the segments, these interrupted medially; the sternites are narrowly and 
indistinctly margined caudaljy with pale. 
Locality: Holotype, d', west of Konganevik, Camden bay, Alaska, July 4, 
1914 (F. Johansen). No. 432. 
This is a very distinct species of Tricyphona, having the fork of vein R 4 +5 
shorter than in any other American species of the genus. The wings of the type 
are badly broken, but otherwise the specimen is in good condition. 
Tricyphona frigida, n. sp. 
Belongs to the diaphana group; size small, wing under 8-5 mm.; general 
colouration greyish, the thoracic dorsum with narrow brown stripes. 
Male. — Length, 5-8 mm.; wing, 7-8 mm. 
Female. — Length, 7-5 mm.; wing, 7-5 mm. 
Rostrum, palpi, and antennae black. Head grey. 
Mesonotal praescutum grey with four brown stripes, the median pair 
separated by a narrow vitta of the ground colour. Pleura grey. Halteres 
brown, the knobs a little darker. Legs with the coxae grey; trochanters brownish 
grey; femora pale brown, passing into dark brown before midlength of the 
segment; tibiae and tarsi dark brown. Wings with a strong brownish tinge, the 
stigma darker brown; indistinct brownish seams along the sector and the cord; 
venation (PI. I, fig. 5) Rs strongly arcuated at its origin; r close to the tip of Ri; 
r-m about equal to the basal deflexion oi R5. 
Abdomen brownish grey; valves of the ovipositor brownish horn-colour. 
Male hypopygium (PL II, fig. 20) with the pleura short and stout, the apical lobe 
densely beset with acute black spines; pleural appendage yellow, at the tip and 
on the cephalic face with a few elongated stout bristles; -at the base of the 
pleurites, a sickle-shaped hook ending in a short, subacute tip; below this a 
smaller curved hook directed caudad. In T. diaphana (PI. II, fig. 21) the 
condition is quite similar, but the pleurites are even shorter and stouter; the 
hooklike appendage at the base of the pleurite is scimitar-shaped, at the tip 
produced into a long drawn out point; the smaller ventral hook is straighter. 
It is probable that fresh specimens are not coloured as described above. 
The type-material is badly discoloured and matted and it is difficult to be sure 
of the exact condition in fresh or better preserved material. 
Locality: Holotype, d', Ketchikan, southeastern Alaska, September 10, 
1916 (F. Johansen). No. 872. Allotype, 9 , with the type. No. 877. 
T. frigida belongs to the group of species that includes exoloma (Doane) and 
diaphana (Doane), these three species showing the following group characters: — 
Full-winged, the wing or its venation showing no tendencies to atrophy; 
median cross-vein present, closing cell first M2; cell Ri very deep so that the 
