FOLSOM. — JAPANESE COLLEMBOLA. 265 



Genus Entomobrya Rond. 



Entomobrya straminea, n. sp. 



(Plate 2, Figs. 19-23.) 



Pale straw yellow throughout. Head, body, and appendages densely 

 clothed with barbellate bristles ; the vertex and basal antennal segment 

 bear also stout, clavate sette (Figs. 19, 20). Eyes three on either side, 

 black, arranged as in Figure 21. Antennae almost half as long as the 

 body, segments cylindrical, related in length nearly as 1 : 2 : 2 : 3. The 

 body segments, measured along the median dorsal line, are related as 

 4:17:12:8:11:11:31:5:3; a cluster of clavate setje arises from 

 the anterior border of the mesonotum, and a similar dorsal cluster occurs 

 upon each succeeding segment. Legs slender; superior claws (Fig. 22) 

 almost straight, tapering to a sharp point, in lateral aspect showing a 

 small tooth on the outer margin and two on the inner margin ; one of 

 the latter is comparatively small, situated near the middle, and overhung 

 by the greatly developed second, or basal tooth ; inferior claws over 

 half as long as the others, straight, broadly linear, acuminate, bearing on 

 the outer margin a broad, acute, hyaline lamella ; a single stout but 

 unknobbed tenent hair is present. Furcula with segments related as 

 28 : 49 : 3 ; mucrones (Fig. 23) broadly falcate, with a prominent erect 

 tooth near the middle and surrounded by three or four stout barbellate 

 bristles which project from the dentes. Length, 1.9 mm. 



Seven types, from Komaba, Tokyo, November 16, 1894. 



E. straminea agrees with E. sexoculata Schott ('9G, pp. 180, 181, PI. 17, 

 Figs. 30-32) in the number of eyes, but differs in the formation of 

 the claws and mucrones, as well as in other respects. It also bears 

 much resemblance to Sinella hijfti Schaffer ('96, pp. 192, 193, Taf. A, 

 Figs. 103-105). P"'or reasons already urged by Schott ('91, p. 20, 

 '96, p. 180), I follow that author in uniting the genus Sinella with 

 Entomobrya. 



Genus Cremastocephalus Schott. 



Cremastocephalus affinis, n. sp. 



(Plate 2, Figs. 24-27.) 



Color, chrome yellow ; the lateral borders of segments two to six 

 inclusive, the posterior borders of the last two abdominal segments and 



