Pselaphiclce of Japan. 301 



punctate. Hind body nearly black, sparingly pubescent. 

 Legs elongate. 



The unique example is, I presume, a male ; the ante- 

 rior trochanters have a short slender spine beneath, the 

 femora a very long one ; the middle trochanters have at 

 the extremity a slender spine, and before this one or two 

 acute asperities ; the corresponding femora are angulate 

 in the middle, and armed with a minute spine. 



Hakone, May, 1880. 



I have much pleasure in naming this fine Pselaphid in 

 honour of Herr Edmoncl Eeitter, of Vienna, whose 

 recently published ' Attempt at a Sj^stematic Arrange- 

 ment ' of the family supplies a valuable clue for the 

 determination of the numerous genera of the family. 



Lasinus. 



Lasinus spinosus, Sharp. 



Sharp, Trans. Ent. Soc. Lond., 1874, p. 106. 



Mr. Lewis found this species on several occasions 

 about Nagasaki, in the months of March and April, 1881, 

 and also at Kuroheiji, Miyanoshita, Kiga, Kioto, Kobe, 

 Osaka, and Oyama, in Sagami ; at Osaka it was found 

 as late in the season as the 8th July. 



It shows considerable variation in certain points, and, 

 as the characters distinctive of the sexes are of a very 

 peculiar and even contradictory character, it is desirable 

 to briefly notice them. The male has a polished space 

 on the inner face of the 10th joint of the antenna, near 

 its apex ; this space is variable in size, and where it is 

 most developed the spot is also excavate, and the upper 

 margin of the excavation is prolonged ; occasionally this 

 joint is simple : the anterior trochanter bears an acute 

 spine, and the femur a still longer one ; the middle 

 trochanter is very strongly angulate beneath, and the 

 femur has a very minute acute denticle. The armature of 

 the female legs differs in that the spines are usually rather 

 longer, and that the middle trochanter bears two spines, 

 of which the outer one is rather elongate ; thus the legs 

 in this sex are more spinose than in the male. In each 

 of the sexes the antennse vary much in the elongation 

 of their joints. 



TRANS. ENT. SOC. 1883. — PART III. (AUG.) Z 



