COLLEMBOLA OF THE FAMILY ISOTOMIDAE 31 



from Siberia, Spitsbergen, Franz Josef Land, Greenland, Mexico, 

 and Guatemala. 



Maine: Water ville, October 6, C. Vv''. Dunning. 



Massachusetts: Cambridge, March 15, in a greenhouse, April 21, 24, May 7 

 (indoors in flowerpots on these dates), June 5, Longmeadow, December 

 3, L. R. Arneluxen. 



New York: Ithaca, March 3, in a milk waste filter, J. G. Needham. New York 

 City, May 17, in a flowerpot. Miss Mabel Minton. 



New Jersey: New Brunswick, February 9, breeding abundantly in husks of 

 English walnuts, A. Peterson. 



District of Cokimbia: Washington, from graves, M. G. Motter (U. S. National 

 Museum). 



Ohio: Yellow Springs, April 15, in a flower pot. 



Michigan: Holland, May 31, W. W. Wood. 



Illinois: Bloomington, March 31, in a cistern, Mary B. King. Chicago, Sep- 

 tember, C. A. Hart. Homer, March 14, 25, 31, April 2, 3, 5, 6, 7, 9, 11, 13, 

 16, 18, 23, 25, 27, May 12, 13, 16, October 15. Urbana, January 30, March 

 11, 14. 



Iowa: Ames, March 25, J. E. Guthrie. 



Kansas: Manhattan, May 14, P. S. Welch, 



Louisiana: Baton Rouge, H. A. Morgan (Cornell University). March 27, in 

 cane trash, C. L. Stracener. 



Minnesota: J. E. Guthrie (University of Minnesota). 



California:. San Francisco, G. Eisen (California Academy of Sciences). 



Alaska: Sitka, June, T. Kincaid (U. S. National Museum). 



FOLSOMIA FIMETARIA (Linnaeus) variety CALDARIA (Axelson) 



Plate 8, Figure 80 



Isotoma fimetaria var. caldaria Axelson, 1905a, p. 790. 

 Isotoma (Folsomia) fimetaria var. caldaria Axelson, 1905b, p. 29. 

 Folso7nia fimetaria v&r. caldaria LiNNANiEMi (Axelson), 1912, p. 116. — Stach, 

 1921, p. 160.— Womerslet, 1924a, p. 32. 



Description. — Clothing long. The long erect sensory setae, which 

 may be three-fourths as long as the segments that bear them, are 

 distally feebly feathered on one side. Antennae evidently longer 

 than the head (as 8:7); fourth segment at least twice as long as the 

 third, slender, subcyJindrical. The furcula extends almost to the 

 ventral tube, and always as far as the first abdominal segment. 

 Denies up to two and one-half times as long as manubrium. Maxi- 

 mum length, 3 mm. Intergrades with typical fimetaria. Finland, 

 in dwelling houses and hothouses; under flowerpots (Linnaniemi). 



Remarks. — Stach (1921) described from Poland a variety inter- 

 mediate between caldaria sii\d fimetaria proper, and noted the presence 

 of a strong or w eak tooth on the inner margin of the unguis, near the 

 middle. 



From Ithaca, N. Y., I received seven specimens, which agree with 

 Linnaniemi's diagnosis but have a strong inner tooth on the unguis 

 (pi. 8, fig. 80). 



