40 I Canadian Arctic Expedition, 1913-18 
FAMILY GEOMETRIDAE. 
Genus Leucobrephos Grt. 
Leucobrephos brephoides Walk. 
Anarta brephoides Walk.: Cat. Brit. Mus., XI, 702, 1857. 
In the Canadian National collection there are seven specimens of this 
uncommon moth from northern locahties, as follows: Mayo river, Yukon Terri- 
tory, April 16, 1907, 3 males (J. A. Davidson) ; Janerk, Klutlan glacier, elevation 
5,500 feet, 141st meridian, north of mount Natazhat, May 2, 1913, 2 males 
(E. W. Nesham); Portage at Grand falls, Hamilton river, Labrador, May 12, 
1894, 2 males (A. P. Low). 
The hfe-history, habits, and distribution of the insect in Canada were 
recently published in The Canadian Entomologist.^ 
Genus Acidalia Tr. 
Acidalia frigidaria Moesch. 
Acidalia frigidaria Moesch.: Wien. Ent. Monat., IV, 373, 1860. 
One specimen in the Canadian National collection from Baldoff creek, 
Yukon Territory, White river district, July 7, 1913 (D. D. Cairnes). The 
species was determined by Mr. L. W. Swett. 
Acidalia species. 
Three specimens belonging to this genus all collected in the Yukon 
Territory by the late Dr. D. D. Cairnes, namely, two in White river district, 
lat. 61° 55', long. 141°, July 16, 1913, and the other near Nation river, lat.65°30', 
long. 141°, are in the Canadian National collection. They probably represent 
an undescribed species, but unfortunately the specimens are in poor condition. 
Genus Holarctias Prout. 
Holarctias sentinaria Geyer. 
HcBmatopis sentinaria Geyer in Hubner, Zutr. Exot. Schmett, f. 823, 1837. 
One specimen in the Canadian National collection from White river district, 
Yukon Territory, lat. 61° 45', long. 141°, July 20, 1913, female (D. D. Cairnes). 
The specimen was determined by Dr. McDunnough. 
Genus Cosymbia Hbn. 
Cosymbia pendulinaria Guen. 
Ephyra pendulinaria Guen.: Spec. Gen., IX, 414, 1857. 
A specimen of what is apparently this species was collected by the late Dr. 
D. D. Cairnes, near Black river, Yukon Territory, lat. 66° 31', long. 141°, on 
June 18, 1912; it is in the Canadian National collection. The lines on this 
specimens are blacker than those of examples in the collection from British 
Columbia and other localities and the discal spot on all wings is entirely filled 
with black. 
1 Can. Ent., XLVIII, 133. 
