JAPANESE COLLEMBOLA. 53 



mamibriuin (basal segment, Fig. 2) swollen ; dentes 

 (intermediate segments, Fig. 7) stout, slightly tapering, 

 with stift' bristles ; mucrones (apical sr^egments) half as 

 long us the dentes, concave, in form as represented in 

 Figs. 7 and 8. Anal spines (Figs. 1, 2 and 9) two, sub- 

 equalling the superior claws in length, curving forward 

 and seated upon tul)erculate pa[)ilhe, the bases of which 

 are contiguous. 



Length 1.3 mm. I have examined over three hun- 

 dred examples of this species, which Dr. Goto found on 

 the surfaces of pools and wells during wet seasons. 



A. communis is most nearly allied to A. armatus Nic' 

 but I have compared the Japanese form with European 

 exam})les of armatus, which were ^ent to me by Dr. C. 

 Schaffer, of Hamburg, and find the two forms to be un- 

 questionably distinct. They are separated by consider- 

 able differences in form of body, coloration, shape of 

 inferior claws, mucrones and post-antennal organs and 

 arrangement of the eyes. 



A. com^niinis also bears much resemblance to A. longi- 

 spinus Tull.2 



Genus XENYLLA Tullberg. 



Xenylla longicauda, n. sp. 



General color (Fig. 10) dark indigo blue, mottled 

 with yellowish-white, which is the ground color ; dor- 

 sum with two interrupted black stripes, subdorsal in 

 position ; also a black transverse streak in each interseg- 

 mental region ; sternum yellowish-white, mottled with 

 dark blue. Eyes (Fig. 11) five on either side, hemi- 

 spherical, seated upon convex, minutely tuI)er(Mdated, 

 black patches, which are n:irrowly encircled with white. 



•Nicolet '41, p. 57, 1>1. 5, tig. 6; Tullburg '72, p. SI, taC. X, flgp.2;{-2r); l.iihbock '73, 

 p. 18(t-181, pi. 40; Tullberg '7ii, p. 38, t:it. 10, flg. 35; Scliiifter '9G, p. 17:t, Uf. II, fl^■8. 

 31, 4G:ind t!if. HI, tig.m. 



a Tullberg '7B, p. 37, taf. X, figs. 31-34; Scliatfer '96, p. 191, taf. II, ligs. 44, 45. 



