Saw-flies 13 g 
])rominent and conspicuous, clue to the semioval brownish mark on each side 
of each spiracle, the metathoracic spiracles distinct, but not functional and 
without brownish spots. Length, 8 m. 
Breeding Record 131: Galls of a species of Pontania collected on Salix 
reticulata at Herschel island, Yukon Territory, end of July, 1916. The galls 
included under this number appear to represent two species, one similar to that 
of Pontania atrata and a very differently shaped gall which consists of two or 
three closely placed irregular swellings, more prominent on the under than on 
the upper surface of the leaf. The upper surface is infolded, forming a pocket 
partially concealing the swollen parts of the gall. Three adults were bred in 
the same summer but were lost in transit. 
Breeding Record 74: Galls of Pontania on Creeping willow, Salix arctica, 
Bernard harbour. Northwest Territories, July 19, 1915. Under this number is 
included two types of galls, one evidently adult, spherical and similar in size 
to those of Pontania atrata, the others are small swellings confined in great 
part to the ventral surface of the leaf and are probably immature. 
Galls of a species of Pontania collected (alcohol) at cape Bathurst, North- 
west Territories, July 26, 1916, on Salix arctica. The galls are large, oval in 
outline, greatly swollen on the underside of the leaf, and project only slightly 
on the upper side. Apparently of a different species from any of those described. 
Specimens of two minute galls occurring near the center of the leaves of 
Salix Richardsonii. Collected end of July, 1916, on Herschel island, Yukon 
Territory (alcohol). The galls are small kidney-shaped swellings which are 
more prominent on the dorsal than on the lower surface, and are evidently 
immature. 
The species of Amauronematus described on the following pages can be 
separated by means of the following table: — ■ 
a Head with the frontal crest not interrupted. 
h Head mesonotum, and mesopleura wholly or for the most part black. 
c Antennae with the third segment distinctly shorter than the fourth; 
clypeus roundly emarginate completus. 
cc Antennae with the third and fourth segments subequal: clypeus angularly 
emarginate indicatus. 
bb Head, mesonotum, and mesopleiu-a distinctly marked with ferruginous. 
c Clypeus broadly shallowly emarginate; supraclypeal area pale digestus. 
cc Clypeus narrowly deeply emarginate; supraclypeal area black cogitatus. 
aa Head with the frontal crest distinctly interrupted. 
b Mesonotum, including the mesoscutellum, black varimius. 
bb Mesonotum, including the mesoscuteUmn, entirely or for the most part pale. 
c OceUar basin concave and broadly continuous with the median fovea aidaius. 
cc OceUar basin shallow and narrowly continuous with the median fovea magnus. 
Amauronematus completus, n. sp. 
Male. — Head finely densely punctured and setaceous, clypeus and labrum 
polished; the clypeus narrowly, moderately deeply emarginate, the clypeal 
lobes large, angularly rounded at apex; the labrum broadly rounded and 
setaceous; antennal furrows deep depressions adjacent to the pretentorinse, 
distinct on the cephalic aspect, and linear adjacent to the lateral ocelli, not 
reaching the caudal margin of the head; the ©cellar and interocellar furrows 
not well defined; the postocellar area broad, not strongly convex; the portion 
of the ocellar areas bearing the lateral ocelli small and elevated, flat ventrad 
of the lateral ocelli and not forming a ridge continuous with the frontal crest; 
the ocellar basin short, deepest adjacent to the median ocellus; the median 
fovea a deep pit, three times as long as wide; the frontal crest wanting dorsad 
of the antennal fossae and not interrupted on the meson; the supraclypeal area 
