Saw-flies 17 G 
ocelli; the ocpllar furrow broad and shallow, connected with the antennal 
furrows; interocellar furrow represented by a triangular punctiform depression 
connected with the antennal furrows, but distinctly separated from the median 
ocellus; the ocellar areas convex, continued as slightly elevated ridges to the 
frontal crest; the frontal crest deeply and broadly interrupted, forming a 
curved strongly elevated ridge on each side continuous with the broad shghtly 
convex s*upraclypeal area; median fovea continuous with the broad furrow 
interrupting the frontal crest, this furrow continuous with the well marked 
ocellar basin, which extends to and around the median ocellus; the antennae 
with the third and fourth segments subequal; the pronotum, the median lobe 
and the cephalic part of the lateral lobes of the mesonotum, the mesoscutellum 
the mesopostscutellum, the metascutum, and the metapleura finely densely 
roughened; the lateral lobes of the mesonotum in great part finely granular 
or polished with a few punctures; the mesosternum and metapleura finely 
granular and polished; wings greatly abbreviated, not extending beyond the 
caudal end of the abdomen, the stigma and costa pale, the veins much darker; 
the claws deeply cleft, the inner rays shorter and blunter than the outer; the 
abdomen polished with sparsely distributed punctures in which setse are attached; 
the saw-guides broad and stout, the dorsal and ventral margins converging, the 
distal end long, straight, and oblique on the ventral portion and the much 
shorter dorsal portion bluntly truncated; the ventral and distal margins se- 
taceous; the cerci long, slender, and pointed; colour blapk with the following 
parts brownish : a spot on the frontal crest and ventral part of the ocellar basin, 
the inner, posterior, and outer orbits, the postocellar area, the collar narrowly, 
the tegulge, the median lobe and the caudal half of each lateral lobe of the 
mesonotum, the cephalic half of the mesoscutellum, a large triangular spot on 
the mesopleura, and the caudal end of the abdomen more or less; the knees 
and the tibise of the prothoracic and mesothoracic legs infuscated whitish. 
Length, 6 mm. 
Barter island, Alaskan Arctic coast, June 16, 1914. D. Jenness, collector. 
Specimen No. 866. 
This species is related to digestus from which it can be separated by the 
characters given in the table. 
Amauronematus magnus, n. sp. 
Female. — Head densely finely punctured throughout, probably densely 
setaceous, though the setse are in great part wanting on the specimen; clypeus 
deeply, broadly, angularly emarginate, the clypeal lobes large and bluntly 
angular; labrum large and truncate; the antennal furrows deep between the 
pretentorinae and the frontal crest and lateral ocelli, deep linear furrows caudad 
of the lateral ocelli, not interrupting the caudal margin of the head; the ocellar 
furrow broad and indefinite; the interocellar furrow distinct, a rounded 
depression where it joins the ocellar furrow; the portion of the ocellar areas 
bearing the lateral ocelli sharply raised, in great part elevated; the frontal crest 
a sharp V-shaped elevation, deeply interrupted on the meson by a broad, deep, 
linear furrow continuous with the median fovea; the median fovea a large, 
deep, punctiform depression; the ocellar basin convex with a distinct linear 
furrow extending from the median ocellus to the frontal crest, not connected 
with the furrow interrupting it;, the supraclypeal area prominent and convex; 
the antennae wanting beyond the second segment; the pronotum, the median 
lobe of the mesonotum, the greater part of its lateral lobes, the mesopleura, 
the mesosternum, and the metapleura densely punctured and setaceous; the 
caudal portion of the lateral lobes of the mesonotum, the mesoscutellum, the 
mesopostscutellum, and the metascutum sparsely punctured and setaceous; the 
