440 



BULLETIN 54, TTNITEI) STATES NATIONAL MUSEUM. 



70. Genus STENETRIUM Haswell. 



Only o'onu.s. 



With characters of family. 



ANALYTICAL KEY<' TO THE 8PECIES OF THE CEXUS STENETRIUM. 



Terminal segment of the }:)ody armed on each side with five sharp teetli on the 

 lateral margin. First pair of legs with the upper distal angle of the fifth article 



produced in a long process Stenetrium serrntum Hansen 



'. Terminal segment of the body with only one tooth at the notch on the lateral 



margin on- each side. First pair of legs with the upper distal angle of the fifth 



article rectangular, without jjrocess. 



b. In the male the lower margin of the hand has its proximal half concave, and 



at the distal end a low broad process, with three or four teeth nearly equal in 



size placed in a convex line. In the female the angle between the palmar 



and the lower margin of the hand measures about 110°; the hand is a little 



moi-e than i; as long as deep Stendrimit ocridentale Hansen 



//. In the male the lower margin of the hand has its proximal half convex, and 

 at the distal end two processes separated by a rather deep incision; each 

 process terminates in two teeth. In the female the angle between the 

 palmar and the lower margin of the hand measures about 125° ; the hand 



is twice as long as deep Stenetrium stebbingi Richardson 



b'''. In the male the lower margin of the hand has its proximal half convex, and 

 at the distal end a narrow^ moderately long process, with the end bifurcate, 

 and sometimes besides a feeble tooth on its proximal margin. In the female 

 the angle between the palmar and the lower margin of the hand measures 

 less than 100°, and the hand is a little more than | as long as deep. 



Stenelriu)!! (intillenfte Hansen 



STENETRIUM SERRATUM Hansen. 



Stenetrlitiii. xirnitvm Hansen, Proc. Zool. Soc. London, 1905, II, Pt. 2, ])p. 

 o28-;)24, 1)1. xi\, figs. 3a-8d; pi. xx, fig. la. 



Locality. — St. Thomas, West Indies. 



Fii;. -197.— Stenetrium skhratum (.After Hansen). <(, He.vd. /), Fihst two TuoR.^crc legs, r, Ter- 



MINAI, part he second I.EtJ. (/, TER.MIN.\I, P.^RT OK FIRST LE(;. r, ,\B1)<>5IEN. I ALL ENLARGED.) 



•'Head has its upper surface (the -frontal plate excluded) nearly 

 twice as broad as long; the lateral part is somewhat expanded and 



" The key given below is taken from Hansen's Conspectus, given in Proc. Zool. See. 

 London, 1905, II, Pt. 2, pp. 316-317. 



