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 

 crossmg 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 coxae sparsely pruinose; trochanters dark brown; 

 remamder 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 4 +5; 

 vem Cu indistinctly seamed with darker; veins brown; venation (PI. I, fig. 4) 

 crossvem r near the tip of Ri; vein R ^ + ^ a Httle longer than the very short 

 fork. 



Abdomen elongate, blackish, with numerous, scattered, appressed golden 

 hairs; basal tergites with a transverse Unear impressed area before mid-length 

 of the segments, these interrupted medially; the sternites are narrowly and 

 indistinctly margined caudally with pale. 



Locality: Holotype, cf, 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 (PI. 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 (PL 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, cf, 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. M^; cell Ri very deep so that the 



