FOLSOM. — JAPANESE COLLEMBOLA." 263 



Except for the number of elements in the postantennal organs, the 

 Japanese specimens agree perfectly with North American representatives 

 of the species ; the examples from Massachusetts which I used for com- 

 parison are of the same lot of which some had been sent to Dr. SchafPer, 

 who pronounced them to be A. inermis Tull., and the equivalent of 

 Lipura Jimvtaria (L.) Lubb. Packard's specimens oi L. jimetaria in the 

 Museum of Comparative Zoology are the same species; in fact, Packard 

 hiiDself wrote ('73, p. 24), "It appears that on comparison I can find no 

 difference between European and American specimens of Lipnra jime- 

 taria." It is at least questionable, however, whether L.fimetaria (L.) 

 Lubb. is the Linnaean species. 



A. inermis is a widely distributed form, having been recorded from 

 Sweden (Tullberg, Schott), Norway (Lie-Pettersen), Finland (Renter), 

 Germany (Schaffer), Bohemia (Uzel), Italy (Parona), England (Lub- 

 bock), Sumatra (Oudemans), and in North America from Massachusetts 

 (Packard), California (Schott), and Florida (Lonnberg, Schott). 



Fam. PODURID^. 



Genus Achorutks Tempi. 



Achorutes communis Folsom. 



1898. Achorutes communis Folsom, pp. 52, 53, Figs. 1-9. 



One hundred and thirty specimens, of all sizes, from Komaba, Tokyo, 

 differ from the types only by having longer and more slender anal spines, 

 in many cases. 



Achorutes gracilis, n. sp. 



(Plate 1, Figs. G-13 ) 



General color, indigo blue (Fig. 6) ; legs and furcula pale ; sternum 

 yellow; the disposition of the hypodermal pigment is shown in Figure 7. 

 Head clothed with stiff setae ; ej'es eight on either side (Fig. 8), upon 

 black patches ; postantennal organ (Fig. 9) of four elements. Antennae 

 subequal to the head in length, with long bristles and with segments 

 related in length as 3 : 4 : 4 : 6. Body cylindrical-ovate in dorsal aspect 

 (Fig. 6), and sparsely clothed with short reclinate setse (Fig. 10). Legs 

 stout, basally spotted with blue; superior claws (Fig. 11) uniformly ta- 



