4g Canadian Arctic Expedition, 1913-18 
Rhogogastera reliqua, n. sp. 
Female. — Head smooth and polished; the clypeus long, the emargination 
shallow, the bottom of the emargination straight, the sides oblique, the clypeal 
lobes slightly broader than long their margins rounded; the labrum shield- 
shaped, pointed, fringed with setse; the antennal plates large; the antennal 
furrows deep, extending from the pretentorinse to the ridge bounding the caudal 
aspect of the head; each lateral ocellus placed on a swollen ocellar area; the 
ocellar areas separated by a prominent interocellar furrow, forming a small 
ocellar basin ventrad of the median ocellus, bounded by the frontal ridges which 
are confluent on the meson and continuous with the supraclypeal area, the 
dorsal end of each continuous with an ocellar area; the ocellar furrow disti-nct, 
the postocellar area quadrangular; antennae with first and second segments 
subequal, the third longer than the fourth and shorter than the fourth and 
fifth together; the pronotum, mesonotum, metanotum, mesopleurse, and the 
metapleurse polished and setaceous; the claws cleft, the inner ray slightly 
shorter than the outer; the abdominal segments finely granular and sparsely 
setaceous; the saw-guides with the dorsal and ventral margins parallel, the caudal 
end obliquely rounded to a blunt point above; colour green or yellowish green 
with the following parts black: the dorsal surface of the antennae, a band covering 
the antennal furrows, connected between the antennal plates, and extending 
across the caudal aspect as converging lines to the occipital foramen, the ocellar 
basin, the interocellar furrow, the transverse furrow of the pronotun, the median 
furrow of the median lobe of the mesonotum, the furrow separating the median 
and lateral lobes, the concave part of the mesoscutum, the infolded portion of 
the mesopostscutellum, the wing veins except the costa and stigma, a spot on 
the caudal surface of the trochanters, a band on the distal half of the caudal 
surface of the femora, a band on the caudal surface of the tibiae, the bottom of 
the infolding between the mesopostscutellum and the basal plates, and spots 
on the mesal part of each abdominal tergum, larger on the caudal segments, the 
lateral margins of the spots irregular, on the cephalic segments deeply squarely 
emarginate. Length, 10 mm. 
Nome, Alaska, August 21-25, 1916. F. Johansen, collector. ''On flowers 
of common, big umbellifer (Heracleum)?" Specimen No. 45. 
This species is closely related to evansii Harrg., from which it is readily 
separated by the difference in colour, the shape of the saw-guides, and the 
topography of the head. 
Euura abortiva, n. sp. 
Female. — Head, except the ventral half of the inner orbits, finely densely 
punctured; the clypeus roundly rather deeply emarginate, the clypeal lobes 
broad and broadly rounded; the labrum bluntly pointed and setaceous; the 
antennal furrows extending from the pretentorinse to the frontal crest as broad 
shallow depressions and from the frontal crest to the ocellar furrow in which they 
terminate in rounded concavities as similar depressions; the ocellar furrow, 
broad and distinct, distant from the lateral ocelli; the interocellar furrow a 
slight V-shaped depression extending halfway to the median ocellus; postocellar 
area continuous with the posterior orbits; ocellar basin represented by a rounded 
depression adjacent to the median ocellus; ocellar areas swollen with rounded 
sides and separated by slight depressions from the frontal areas, which are 
continuous with a poorly defined frontal crest; median fovea distinct, puncti- 
form, continued dorsad as a linear depression slightly interrupting the frontal 
crest; antennae short, segments three and four subequal, the segments rough- 
ened and densly setaceous with short setae; pronotum and the median and 
lateral lobes of the mesonotum finely punctured like the head; mesoscutellum 
and mesopostscutellu n polished; metascutum more closely and coarsely 
