NO. 2134. NORTH AMERICAN COLLEMBOLOUS INSECTS— FOLSOM. 509 



Packard's two cotypes of Anura gihhosa, in the Museum of Com- 

 parative Zoology, agree perfectly with my three European repre- 

 sentatives of Neanura muscorum,. 



Harvey gave me cotypes of his Anowa sextuherculata, which proved 

 to be N. muscorum. 



This common species occurs in damp decaying logs and under logs 

 or dead leaves on damp soil. 



Mame. — Brunswick, September, A. S. Packard, jr. (M. C. Z.). 

 Orono, May, October 11, F. L. Harvey. 



New Hampshire. — Walpole, July 15. 



Massachusetts. — Cambridge or Arlington, March 27, April 8, 11, 

 15, 17, 19, 23, May 1, 2, 23, June 1, 12, July 6, 10, 16, August 19, 

 26, September 10, 30, October 14, November 6. Dedham, July 21. 



New York. — A. D. MacGillivray. 



Pennsylvania. — Harrisburg, November 6, H. A. Surface. 



Ohio. — Yellow Springs, August 28. 



lUinois. — Urbana, November 2. Dubois, April 28, V. A. Hart. 



Minnesota. — J. E. Guthrie (Univ. Minn.). 



Canada. — Toronto, Ontario, June 26, R. J. Crew. 



In most parts of Europe, Neanura muscorum is one of the com- 

 monest species of Collembola. 



NEANURA GIGANTEA Tullberg. 



Plate 7, fig. 5; plate 23, figs. 226-228. 



Anura giganfca Tullberg, 1876. — Schoit, 1894. 



Neamira gigantea Schaffer, 19006. — Folsom, 19026. — Axelson, 19036. — 

 Wahlgren, 1907. 



General color of alcoholic specimens dark blue, with conspicuous 

 blackish tubercles (fig. 5); living examples pruinose (Tidlberg). 

 Head twice as broad as long, with 12 large tubercles, including those 

 bearing the eyes, arranged as m figm^e 5. Eyes (fig. 226) five on each 

 side. Postantennal organs (fig. 227) each composed of more than 

 100 clavate papillae, forming a rosette. Antennae half as long as 

 the head, conical, with segments related in length as 4 : 3 : 2 : 6 ; basal 

 and second segments half as long as broad ; third and fourth coales- 

 cent; the mmute antennal tubercles become successively smaller on 

 each segment. Body oval in dorsal aspect. The number of large 

 tubercles on each successive segment is, respectively, 6, 8, 8, 8, 8, 

 8, 8, 6, 2; the tubercle at each end of each transverse row is behind 

 the others on the first seven segments; on the seventh both are also 

 ventral and inconspicuous; on the eighth four tubercles are ventral 

 and two dorsal; the ninth segment is invisible from above and bears 

 two small tubercles. Legs short and stout. Ungues (fig. 228) alike, 

 stout, uniformly curving and tapering, strongly unidentate on the 



