4 G 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 setae; 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 distinct, 

 the postocellar area quadrangular; antennae with first and second segments 

 ^ubequal, the third longer than the fourth and shorter than the fourth and 

 fifth together; the pronotum, mesonotum, metanotum, mesopleurae, and the 

 metapleurae 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 pretentorinae 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 Hnear 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 mesopostscutellum polished; metascutum more closely and coarsely 



