Saw-flies 9 g 
granular, the median lobe longitudinally furrowed but without a mesal carina, 
the parapsidial grooves almost wanting; the mesoscutellum polished, the 
mesopostscutellum roughened on each side and polished at middle; the 
metascutum roughened at middle and smooth on each side; the mesopleura 
smooth and s'parsely setaceous, the mesosternum and metapleura polished; 
the wings nortaal in size, the stigma pale, the veins brownish; the claws deeply 
cleft, the inner ray much shorter than the outer; the abdomen with the surface 
finely densely granular, the last sternum with the caudal margin bluntly pointed; 
colour black with the following parts yellowish infuscated: the knees, the tibiae, 
the tarsi, and the greater part of the last sternum of the abdomen. Length, 
4 mm. 
Larva. — Body white with portions of the head darker; ocularia black, the 
caudal margin not sharply defined, the ocellus located nearer the mesal than the 
caudal margin; antennse short oval areas bounded by a faint brownish line, 
more than their own length distant from the ocularia, its surface bearing two 
groups of closely adjacent minute brownish areas; head white with a brownish 
area of varying extent formed of minute round brownish spots, sometimes 
covering the dorsal half of the front and the vertex adjacent to the epicranial 
stem and extending indistinctly to the ocularia; mandibles distinctly dentate; 
spinneret large, its distal end blunt; microthorax linear, brownish; prothorax 
with three annulets, the first and third very inconspicuous, the second swollen 
and scarcely emarginate on the meson, bearing three setae on each side, the 
spiracular areas small and swollen and each bearing five or six setae, the pedal 
area not sharply defined, bearing about three setae; mesothorax and meta- 
thorax with four annulets, the first short and in the mesothorax bearing about 
six setae and four in the metathorax, the second and third annulets subequal 
in length, not strongly swollen and bearing only a few setae, the fourth annulet 
inconspicuous; the spiracular areas large and not strongly swollen and setaceous; 
the pedal areas small and with about three setae; a brownish chitinized spot 
near the ventral margin of each spiracular area; abdominal segments one to eight 
with four annulets, not prominent on any of the segments ancl inconspicuous 
on the caudal segments, the first small and bearing three setae on each side of 
the meson, the second and third large, each with a row of setae, the second 
with the mesal part modified into a more elevated lighter coloured creeping 
ridge, the fourth small; the spiracular and postspiracular areas subequal in 
size and bearing setae; the pedal areas inconspicuous and bearing two or three 
setae; annulets indistinguishable on the ninth segment, with three bands of 
setae; the tenth tergum without annulets or setae, usually with transverse 
rows of minute spots, the caudal end emarginate; prolegs typical in form; 
sjDiracles distinct, brownish, not with a fuscous spot on each side. Length, 
6.5 to 8 mm. 
Herschel island, Arctic coast of Yukon Territory. Larvae collected in galls 
on leaves of Salix reticulata, August 13, 1914. Imagines emerged July, 1915. 
Breeding Record 36. F. Johansen, collector. Specimen No. 152. 
This species can be separated from californica Marlatt, to which it is related 
by the broad shallow emargination of the clypeus, the broad interruption of 
the frontal crest and the ventral end of the deep ocellar basin. 
Pontania deminuta, n. sp. 
Female.- — Head finely densely granular, ocellar basin indefinitely rugose; 
the clypeus narrowly, shallowly, roundly emarginate, the clypeal lobes broad 
and bluntly angular; the labrum long and rounded; the antennal furrows deep 
from the pretentorinae to the frontal crest, broad and shallow from the frontal 
crest to the lateral ocelli and almost wanting and linear on the dorsal aspect of 
the head, not interrupting its caudal margin; the ocellar furrow broad and 
