


LN UR oS ae ena ee 
| r ve 4 Mf a 289 Fae ‘) iN ay 
4q Canadian Arctic Expedition, 1913-1918 og 
Order FHYLLOPODA. 
Suborder NoTostrAca. 
Family APODIDAE Burmeister. 
Genus Lepidurus Leach. 
Lepidurus arcticus (Pall.)! 
Monoculus arcticus. Pawuuas, 1793, App. (p. 679), p. 39. 
Apus glacialis, KROyER, 1847, p. 431; GruBE, 1853, p. 150; REINHARDT AND 
ScuiOpTE, 1857, p. 35, 73; LintsEBorG 1872, p. 848; VANHOFFEN, 1897, p. 
175; JOHANSEN, 1911, p. 383; STEPHENSEN, 1917, p. 284. 
Lepidurus glacialis, BAtrD, 1852, p. 6, Tab. XXII, fig. 2; Packarp, 1873, p. 619; 
and 1883, p. 316, Plates 16, 17, 21; LinusEBore, 1877, p. 11; Murpocn,. 
1885, p. 149; Simon, 1886, p. 429; GuERNE AND RicHarpD, 1889, p. 631; 
WESENBERG-LUND, 1894, p. 87, and 1896, p 135; Sars, 1874, p. 88; 1886, 
p. 70; 1891, p. 27; and 1896, p. 68, Plates XI-XIII; Ricuarp, 1897, p. 194, 
and 1898, p. 327-33; Linxo, 1901, p. 66; Haspersoscn, 1916, p. 134. 
Lemdurus arcticus, Sars, 1897, pp. 470-3; 1911, p. 15; LitisyeBore, 1900, p. 3; 
OrTMAN, 1901, p. 145; Exman, 1905, p. 14; Zyxorr, 1905, p. 342; Breun, 
1911, p. 306, Pl. 18; Oxtorsson, 1918, p. 383, fig. 18-19; JoHANSsEN, 1921, 
p. 47, (Can. Field-Nat.’’). 
EXPEDITION RECORDS 
Lake (lagoon) at Teller (Port Clarence), Alaska, July 25, 1913, 3 females. 
Lagoon-pond at Martin point, Arctic Alaska, July 26, 1914, 40 females. 
Lake inland at Bernard Harbour Northwest Territories, August 10, 1915, 
11 females. t 
Pond on ridge at Bernard harbour, Northwest Territories, August 16, 1915, Be 
42 females, 2 males. | 
Pond on ridge at Bernard harbour, Northwest Territories, October 6, 1915, 
2 females. 
Pond on ridge at Bernard harbour, Northwest Territories, July 3, 1916, 30 
specimens (immature). 
OTHER RECORDS. 
Tundra pools at Point Barrow and Ooglamie, Alaska, July 10, 21, 1882. 
J. Murdoch coll. (Murdoch, 1885, p. 149), 65 females. 
Ponds on coastal plain of Arctic ocean at lat. 69° 40’ N., long. 141° W., 
July 25, 1912, J. M. Jessup coll. 10 females, 6-15 mm. long. 
Cape Krusenstern, Northwest Territories, August 19, 1849, J. Rae coll, 
(Baird, 1852, p. 6). Four males (?) about 10 mm., 9 females 11 to 20 mm. long.? | 
Prof. G. O. Sars tells me in a recent letter (April, 1921), that this species 
was also secured by the “‘Gjéa’’-Expedition (Amundsen), at Gjéa-Havn, south 
side of King William island, on the following dates: August 12, 23, 1904; August 
®, ae The specimens are very many, and measure from 5 to 20 mm. in 
ength. 

1 Prof. G. O. Sars tells me in a recent letter that the proper specific name is arcticus, and not glacialis, 
ara “ ew definitely established that Monoculus arcticus Pallas (1793) is the same as A pus glacialis 
réyer (1847). : . 
2 The four smallest specimens are in poor condition; the 8 largest (15-20 mm.) females carry winter- 
eggs. 
