252 Mr. W. F. Lanchester on some 



emarginate, and tlie dactyl curves downwards. Now this 

 example and two males which I have already described from 

 Singapore (t. c.) show the mode.stus arrangement pretty 

 clearly, though even in this small number one may see a 

 degree of gradation, though a slight one, to the pulchella 

 form ; while a fourth example, a female, rather smaller 

 (already described, t. c), shows the pulchella arrangement, 

 not perfectly, but distinctly. There are no other noticeable 

 differences between the two forms ( u sonstige Unterschiede 

 giebt es kaum," de Man, t. c), and I do not think the slight 

 variations in the hand-structure are as yet more than varia- 

 tions. It is true that three distinctions are noticed, but these 

 three are really only one variation, the curvature of the 

 dactyl and the gape of the fingers being implied by the 

 emargination of the finger-tips. And the amount of this 

 emargination, even in my four examples, is not at all con- 

 stant, the two smaller examples having sharper finger-tips in 

 proportion. It seems to me, therefore, better to retain 

 Dr. de Man's specific name in a varietal sense for those forms 

 of A. pulchella in which the spoon-shaped arrangement is 

 well marked, while leaving it open to decision as to whether 

 the difference is truly varietal, or only one of age, sex, or 

 both. 



Dim. : Length 11 millim., breadth 16"25. 



IV. Genus ETISODES, Dana. 



6. Etisodes anaglyptus, M.-Edw. 



Etisus anaglyptus, M.-Edw. Hist. Nat. Crust, t. i. p. 411 (1835). 

 Etisodes anaglyptus, Lanchester, P. Z. S. Lond. (1900). 



Distr. Philippines, Clairemont, Torres Strait. 



No. ecu. Hab. Pulau Satang. 



A female. I have already (t. c. supra) given a fuller 

 description of this species, as a supplement to M. -Edwards's 

 short diagnosis. 



Dim. : Length 35 millim., breadth 52. 



V. Genus PlLUMNUS, Leach. 



7. Pilumnus vespertilio, Fabr. 



Cancer vespertilio, Fabr. Suppl. Entom. p. 338 (1798). 

 Pilumnus vespertilio, M.-Edw. Hist. Nat. Crust, t. i. p. 418 (1835) ; 

 Haswell, Catal. Austr. Crust, p. 65 (1882). 



