Saw-flies :, . , 



punctured than the mesoscutum; mesopleura finely densely punctured and 

 setaceous; front wings fully formed, not reaching beyond the seventh abdominal 

 segment, the petiolate cell abbreviated, veins and stigma brownish; hind wii 

 normal insize and venation; claws deeply cleft, the rays subequal; the abdomen 

 finely granular; saw-guides large and broad, the dorsal margin straight, the 

 ventral margin oblique, the distal end obliquely and broadly rounded; cerci 

 long and slender, extending beyond the end of the abdomen; color black with 

 the tegulae and the legs with the knees, tibia\ and tarsi yellowish infuscated. 

 Length 4 mm. 



Herschel island, Yukon Territory. F. Johansen, collector. Larvae collected 

 in galls on leaves of Salix reticulata L., August 13, 1914. Adults emerged Jul v. 

 1915. Specimen No. 253. 



This specimen was received as a part of Breeding Record 36. ''Material 

 (galls) only collected (in 1914) once and from the same host-plant i Salix 

 reticulata)." There is the further note on larvae from willows on Herschel island: 

 "Host-plant Salix reticulata L. 2 (3) imagines reared. Galls." Mr. Johansen 

 makes the further suggestion regarding this number: "Larvae collected as galls 

 on bushy willow, probably Salix Richarclsonii K., on Herschel island. Yukon 

 Territory, end of July, 1916, were not reared (only in alcohol). Their host- 

 plant is different from that of Rearing Record 36." The structure of the wings 

 of the adult and the habits of the larvae of the species of Euura. which have 

 always been considered as borers in the stem of willow, precludes its inclusion 

 with the other specimen received under this breeding record number and 

 described later as Pontania delicatula. I mistrust that the feeding habits of the 

 larvae of the species of Euura do not vary but that in bred individuals, the wings 

 are not always completely matured, with the result that there are specimens bred 

 from galls which lack the free part of R 5 and described as species of Euura. 



This species is related to niger Prov. It is readily separated from this species 

 by the short wings, the difference in the median fovea and frontal crest and in 

 the darker-coloured legs. 



Euura arctica, n. sp. 



Female. — Head coarsely granular throughout ; the clypeus broadly, 

 deeply, angularly emarginate, the clypeal lobes broad and rounded; the labrum 

 broadly rounded and setaceous; the antennal furrows deep and broad from the 

 pretentorinae to the frontal crest, indefinite on the cephalic aspect, broad and 

 deep adjacent to the lateral ocelli, terminating in a large punctiform depression, 

 not reaching the caudal margin of the head: the interocellar furrow a linear 

 depression extending from the median ocellus to a linear, low, V-shaped ocellar 

 furrow, which is not connected with the antennal furrows; the antennal furrows 

 widened opposite the median ocellus, extending almost to the compound eyes, 

 limited on the ventral side by a distinct elevation; the ocellar area convex, not 

 elevated above the broad flat ocellar basin; ocellar basin limited on the ventral 

 side by strongly elevated frontal areas which are continuous with the frontal 

 crest, separated by a broad concavity which is continuous with the long broad 

 concave median fovea; median fovea limited by low antennal plates; supraclyp- 

 eal area broadly convex; antenna* long and slender, the third segment slightly 

 longer than the fourth, the surface of the segment- granular and finely setaceous; 

 the pronotum coarsely granular like the head; the median and lateral lobes of 

 the mesonotum uniformly finely granular, the latter sparsely setaceous; the 

 median lobe with a broad longitudinal depression with a mesa! carina; the 

 mesoscutellum and mesopostscutellum polished; the metascutum concealed by 

 the wings; the mesopleura with the dorsal portion finely granular and the 

 ventral portion, the mesosternum, and the metapleura, polished; the front 

 wings normal in size, the costa and stigma pale, and the other veins brownish; 

 the claws deeply cleft, the inner ray much shorter than the outer: the abdomen 



