100 BULLETIN 168, UNITED STATES NATIONAL MUSEUM 



ISOTOMA (ISOTOMA) OLIVACEA Tullberg variety NEGLECTA Schaffer 



Plate 32, Figures 372-375 



Isotoma neglecta Schaffer, 1900b, p. 258. 



Isotoma ajjinis Axelson, 1900, p. 119. 



Isotoma grisescens var. neglecta Linnaniemi, 1907, p. 30; 1909, p. 11. 



Isotoma olivacea var. neglecta Linnaniemi, 1912, p. 151. — Handschin, 1929, p. 70. 



Description. — The variety neglecta differs from typical olivacea in the 

 following respects: Color blue to blackish purple. Postantennal 

 organ one and one-half to two times as long as the diameter of an eye. 

 Apical tooth of mucro long and slender. Proximal teeth about equal, 

 slanting backward, situated side by side. Unguis usually with a 

 small inner tooth. Unguiculus broadly rounded basally, with or 

 without a minute tooth. Length, up to 2 mm (Linnaniemi, 1912). 



The specimens that I refer to this variety are pale blue, mottled 

 with rounded pale spots; antennae blue; legs white, pigmented with 

 blue basally ; manubrium pigmented ; dentes white. The dorsal crenu- 

 lations of the dens stop at a distance from the mucro equal to one 

 and one-half times the length of the latter. Postantennal organ 

 (pi. 32, fig. 372) one and one-half times as long as the diameter of an 

 eye. Unguis (pi. 32, fig. 374) with a strong tooth near the middle of 

 the inner margin. Unguiculus with a weak angle-tooth. Dentes not 

 twice as long as manubrium (as 23:13). Mucrones (pi. 32, fig. 375) 

 longer than hind unguiculi (as 19:11). Length, 1.1 mm. In other 

 respects the specimens agree with typical olivacea. 



Remarks. — I have followed Linnaniemi regarding this variety 

 neglecta, of which I have seen no European examples. 



Distribution. — I. o. neglecta is known from Germany, Finland, and 

 possibly Sweden. 



Canada: Arnprior, Ontario, August, in green moss, C. Macnamara. De Grassi 

 Point, Lake Simcoe, September 1, on the fungus Clavaria, E. M. Walker. 



ISOTOMA (ISOTOMA) OLIVACEA Tullberg variety GRISEA Lubbock 



Plate 33, Figures 376-383 



Isotoma grisea Lubbock, 1873, p. 172. — Collinge and Shoebotham, 1910, 

 p. 106. — Shoebotham, 1917, p. 221. 



Isotoma grisescens Schaffer, 1896, p. 188; 1900b, p. 257. — Carpenter and 

 Evans, 1899, p. 248.— Axelson, 1900, p. 119; 1905b, p. 32; 1906, p. 15.— 

 Linnaniemi (Axelson), 1907, p. 30; 1909, p. 11. — Lie-Pettersen, 1907, 

 p. 62.— Evans, 1901b, p. 153; 1908, p. 196.— Brown, 1918, p. 186. 



Isotoma olivacea, var. grisescens Borner, 1901a, p. 56. — Linnaniemi, 1912, 

 p. 150.— Handschin, 1924a, p. 116; 1928c, p. 128; 1929, p. 70.— Womehsley, 

 1924a, p. 32; 1925, p. 219. 



Isotoma olivacea var. grisea Stach, 1922a, p. 20. 



Description. — This variety differs from typical olivacea chiefly in 

 the following respects. Lighter or darker gray. Proximal teeth of 

 mucro mostly directed backward, sometimes spinelike and turned 



