Saw -flies 15 G 
concave depression, the ocellar furrow deeper and linear; the postocellar area 
sharply defined and convex with a mesal furrow; the ocellar areas not strongly 
elevated and only slightly elevated ventrad of the lateral ocelli, enlarged adjacent 
to the frontal crest; the frontal crest narrow, strongly elevated, and not inter- 
rupted; the ocellar basin distinct but short and surrounding the median ocellus,'* 
the median fovea a deep pit twice as long as wide; the supraclypeal area convex 
and setaceous; antennae roughened, the third segment shorter than the fourth, 
the fourth and fifth subequal; the pronotum and the cephalic part of the 
mesonotum roughened, the remainder of the median lobe and of the lateral 
lobes polished, with sparse punctures; the mesopleura finely densely roughened; 
the mesosternum and metapleura polished and setaceous; the wings hyaline, 
the costa and stigma pale, the veins brownish, and the stigma long with the 
caudal margin nearly straight; the claws not deeply cleft, the outer ray distinctly 
longer than the inner; the abdomen indistinctly granular and sparsely setaceous; 
the saw-guides with the dorsal margin straight, the ventral margin gradually 
rounded, and the distal end broadly, obliquely, truncately rounded; the colour 
black with the following parts brownish: the head except the antennal furrows 
and the median fovea and a spot about the ocelli and the occiput, the pronotum 
in great part, the tegulse in part, a V-shaped mark on the parapsidial grooves, 
the axillae, the cephalic half of the mesoscutellum, a large mark on each pleuron, 
the distal third of the femora, the tibiae, and the saw-guides; the distal segments 
of the mesotarsi and metatarsi more or less infuscated. Length, 5-5 mm. 
West of Konganevik, Camden bay, Alaska, July 4, 1914. Specimen 
No. 520. 
The elongate median fovea, the form of the clypeus, and the colouration 
will separate this species horn fulvipes Norton, to which it is related. 
Amauronematus cogitatus, n. sp. 
Female. — Head, except the clypeus and labrum, roughened throughout, 
more distinctly on the mesal portion, and setaceous; clypeus polished, narrowly, 
deeply, roundly emarginate, clypeal lobes large, triangular, blunt projections; 
the labrum polished, broadly rounded, densely setaceous near the mai'gin; 
antennal furrows almost completely interrupted ventral of the lateral ocelli, 
deep and broad ventrad of the interruption, the verticad furrows linear and 
distinct, not interrupting the caudal margin of the head; the ocellar furrow a 
broad round depression, almost wanting; the interocellar furrow obsolete, 
probably represented by a distinct mesal pit in the ocellar furrow; the ocellar 
areas flat, only slightly elevated for the lateral ocelli, continuous with the frontal 
crest; the frontal crest not elevated above the ocellar areas, lateral walls 
precipitous which is due to the deep antennal furrows, interrupted by a deep 
linear mesal furrow, this furrow not interrupting the ocellar areas and not con- 
nected with the minute ocellar basin located ventrad of the median ocellus; 
the median fovea round, deep, pit-like, and continuous with the furrow inter- 
rupting the frontal crest; the supraclypeal area elevated, the mesal portion flat, 
continuous with the interrupted longitudinal portions of the frontal crest; 
antennae wanting beyond the second segment; the pronotum, mesopleura, and 
metapostscutellum densely finely punctured; the median and lateral lobes of 
the mesonotum, the mesoscutellum, the metascutum, the ventral half of the 
metapleura, and the mesosternum with sparsely placed round pits bearing setae, 
more abundant on the median lobe of the mesonotum; the wings with the 
stigma and costa pale, the veins only slightly darkened; the claws deeply cleft, 
the inner rays shorter than the outer, obliquely truncate; the abdomen polished, 
sparsely setaceous; the saw-guides stout, convex, the dorsal and ventral margins 
strongly convergent, the distal end short and bluntly rounded; the colour black 
with the following parts rufous: the ventral ends of the ocellar areas, the inner. 
