Crane-flies 21 c 
median line; of these the distal one is the longest, the proximal one usually very 
short; there are three i30sterior setse on either side, the two proximal being 
longest and in their own punctures, the third one distal in position, lying close to 
the black pleural stripe and located in a very small puncture on the margin of the 
adjoining larger puncture. 
Colouration: Dorsum (PI. V, fig. 60) dull yellow. Just inside the broad 
lateral stripe and separated from it by a narrow bright yellow line is a narrow 
dark brown line, almost continuous but shghtly interrupted in places; this dark 
line begins on the mesothorax and continues to the last segment. The dorsum of 
the abdomen between these dark stripes is handsomely marked with dorsal 
shields of brown which are narrowly margined with darker brown, the narrow 
apex of the shield directed caudad; there are about seven of these dorsal shields, 
the integument on either side of them with three bright yellow dots in straight 
diverging lines, all of these dots lying on the cephalic ring of the segment. 
Pleural region dark brown, very broad but paler on the thoracic segments, 
gradually narrowed and l^ecoming darker toward the end of the body, terminating 
near the anal gills. This dark pleural stripe is dotted with numerous yellowish 
spots. Ventral surface abruptly and conspicuously light yellow. 
Spiracular disk surrounded by six long, finger-like lobes, the dorsal lobes 
rather the shortest although still long and finger-like, lying parallel, the ventral 
lobes longest; all the lobes narrowly margined with black and with a slender 
black vitta bisecting the inner face of the lobe from the tip inward toward the 
disk, at the distal end expanded into a blackish apex; the apex and lateral 
margins bear long fringes of hairs as in Stijgeropis, these hairs being longest 
toward the tips of the lobes. Anal gills six, short but rather slender, incon- 
spicuous, the two lateral pairs longest, the inner pair much shorter. 
I would refer this to a position not far removed from Stygeropis 
although it is very differently coloured from the species last described under that 
name. However, the structure of the larvae seems to indicate that it is more 
probably a Stygeropis than a Tipula or a Nephrotoma. If the generic reference 
is correct the larvae probably belong to either S. parrii or S. parrioides. 
In the specimens from Demarcation point, Alaska, the anterior end of the 
body is pale and the median dorsal shields are continuous as a practically un- 
interrupted dorso-median fine, only slightly constricted toward the posterior 
end of each segment; the lateral dorsal stripes are very dark. However, the 
structure of the spiracular disk and the chsetotaxy are entirely the same and I feel 
sure that all the material pertains to the same species. 
In the vial containing the two larvae from Bernard harbour, described above, 
there was an additional TipuHne larva that is closest to the Tipuline No. 3 
described later, but probably represents a still different species. Because this is 
the only specimen included in the material it is not further discussed in this 
report. 
Tipuline No. 2. 
Locality: Three larvae, taken at Demarcation point, Alaska, Maj^, 1914. 
No. 4 (F. Johansen); melted ponds in the tundra. 
Length, 20-23 mm.; dextro-sinistral width, 3 -3-3 -6 mm.; dorso-ventral 
depth, 2-2-2 mm. 
Body moderately elongated, form strongly depressed; thoracic and first 
abdominal segments with the margins regular; abdominal segments 3 to 8 with 
a prominent false constriction or pseudo-suture at about two-thirds the length 
of the segment, the edges of the segments produced laterad to give a serrate 
appearance to the margins of the abdomen; the anterior ring of each segment 
has the serration larger than that of the posterior ring so that these alternate; 
penultimate segment of the abdomen with the caudal angles produced strongly 
caudad into long, slender lobes. 
