Saw-flies 13 G 



prominent and conspicuous, due 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. 



b 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 mesopleura distinctly marked with ferruginous. 



c Clypeus broadly shallowly emarginate; supraclypeal area pale digeslus. 



cc Clypeus narrowly deeply emarginate; supraclypeal area black cogitatus. 



aa Head with the frontal crest distinctly interrupted. 



b Mesonotum, including the mesoscutellum, black varianus. 



bb Mesonotum, including the mesoscutellum, entirely or for the most part pale. 



c Ocellar basin concave and broadly continuous with the median fovea aulatus. 



cc Ocellar 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 ocellar 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 



