Saw-flies \ I < , 



granular, the median lobe longitudinally furrowed but withoul a mesa! cari] 

 the parapsidial grooves almost wanting; the mesoscutellum polished, the 

 mesopostseutellum roughened on each side and polished at middle: the 

 metascutum roughened at middle and smooth on each side; the mesopleura 

 smooth and sparsely setaceous, the mesosternum and metapleura polished; 

 the wings normal in size, the stigma pale, tJhe veins brownish; the claws deeply 

 cleft, the inner ray much shorter than the outer; the abdomen with the surface 

 finely densely granular, the last sternum with the caudal margin bluntly pointed; 

 colour black with the following parts yellowish infuscated: the knees, 1 he tibia*, 

 the tarsi, and the greater part of the last sternum of the abdomen. Length, 

 4 mm. 



Larva. — Body white with portions of the head darker; ocularia black, the 

 caudal margin not sharply defined, the ocellus located nearer the mesal than the 

 caudal margin; antennae short oval areas bounded by a faint brownish hue. 

 more than their own length distant from the ocularia, its surface* bearing two 

 groups of closely adjacent minute brownish areas; head white with a brownish 

 area of varying extent formed of minute round brownish spots, sometimes 

 covering the dorsal half of the front and the vertex adjacent to the epicranial 

 stem and extending indistinctly to the ocularia; mandibles distinctly dentate; 

 spinneret large, its distal end blunt; microthorax linear, brownish; prothorax 

 with three annulets, the first and third very inconspicuous, the second swollen 

 and scarcely emarginate on the meson, bearing three setae on each side, the 

 spiracular areas small and swollen and each bearing five or six setae, the pedal 

 area not sharply defined, bearing about three setae; mesothorax and meta- 

 thorax with four annulets, the first short and in the mesothorax bearing about 

 six setae and four in the metathorax, the second and third annulets subequal 

 in length, not strongly swollen and bearing only a few setae, the fourth annulet 

 inconspicuous; the spiracular areas large and not strongly swollen and setaceous; 

 the pedal areas small and with about three setae; a brownish chitinized spot 

 near the ventral margin of each spiracular area; abdominal segments one to eight 

 with four annulets, not prominent on any of the segments and inconspicuous 

 on the caudal segments, the first small and bearing three setae on each side of 

 the meson, the second and third large, each with a row of seta 1 , the second 

 with the mesal part modified into a more elevated lighter coloured creeping 

 ridge, the fourth small; the spiracular and postspiracular areas subequal in 

 size and bearing setae; the pedal areas inconspicuous and bearing two or three 

 setae; annulets indistinguishable on the ninth segment, with three bands of 

 setae; the tenth tergum without annulets or setae, usually with transverse 

 rows of minute spots, the caudal end emarginate; prolegs typical in form; 

 spiracles distinct, brownish, not with a fuscous spot on each side. Length, 

 6.5 to 8 mm. 



Herschel island, Arctic coast of Yukon Territory. Larva- collected in galls 

 on leaves of Salix reticulata, August 13, 1914. Imagines emerged July, L915. 

 Breeding Record 36. F. Johansen, collector. Specimen No. 152. 



This species can be separated from californica Marlatt, to which it is related 

 by the broad shallow emargination of the clypeus, the broad interruption of 

 the frontal crest and the ventral end of the deep ocellar basin. 



Pontania deminuta, n. sp. 



Female. — Head finely densely granular, ocellar basin indefinitely rugose; 

 the clypeus narrowly, shallowly, roundly emarginate. the clypeal lobes broad 

 and bluntly angular; the labrum long and rounded: the antenna! furrows dee]) 

 from the pretentorinae to the frontal crest, broad and shallow from the frontal 

 crest to the lateral ocelli and almost wanting and Linear on the dorsal aspect of 

 the head, not interrupting its caudal margin; tin* ocellar furrow broad and 



