56 BULLETIN OF THE ESSEX INSTITUTE. 



alcohol, numerous scales had nevertheless remained 

 attached to the dorsal part of the body which were very 

 constant in size and form. Legs densely bristly, mostly 

 pale yellow ; coxae with a few clavate hairs ; femora often 

 purple apically , tibiee purple basally ; hind tibiae long 

 and slender. Superior claw (Fig. 17) slender, tapering, 

 almost straight, bidentate ; inferior claw half as long, 

 broadly linear, acute ; tibite provided with barbellate 

 bristles and a single, clubbed tenent hair. Furcula half 

 as long as the body, densely covered with clavate hairs 

 proximally and with barbellate bristles distally ; seg- 

 ments as 21 : 25 : 2, in relative lengths ; dentes (Fig. 18) 

 crenulate, bare distally, and strongly curved (but usu- 

 ally less curved than is represented in Fig. 18); mu- 

 crones (Fig. 18) bidentate, as in Entomobrya. 



Length, 1.8 mm. Described from nine types, which 

 Dr. Goto found between the scales of old pine cones, 

 under and upon the bark of various kinds of tree, and in 

 the house, occurring during the warmer part of the year. 



Seira japonica appears to be nearest allied to a species 

 from Sumatra, 8. annulicornis Oud., as well as I can 

 judge from the brief description which Oudemans gives 

 ('90, p. 87-88). In his species, however, the terminal 

 antennal segment is much longer, the segments having 

 the ratio 7 : 13 : 12 : 19 ; the superior claw of S. annu- 

 licornis is tridendate and the furcula is relatively longer, 

 with its segments related in length as 54 : 54 : 2. In 

 addition, the diiference in coloration is decided. 



EXPLANATION OF PLATE. 



Fig. 1. Achorutes comimtnis, n. sp. Dorsal aspect, X41. 



Fig. 2. " " " Left aspect, X 41. 



Fig. 3. " " " Eyes and postantennal or- 



gan of the right side, X330 (m-m is parallel with the median line). 



Fig. 4. Achorutes communis, n, sp. Postantennal organs of the 

 game head, X 330. 



