KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 35. N:0 5. 39 



spinulose »Sa, one longer and one shorter. L 4 with 1 strong (the longest of all) Sa 

 and 1 shorter, plumose Sp. B 2 distally broader, with 2, distal plumose Si. Bi 1 with 

 2 distal Si. Ri 3 — 5 with 4 S, all plumose. 



Natatory legs of the 1st to 4th pairs. B 1 with straight or slightly convex margins 

 and 1 Si, of the 2nd and 3rd p. hairy on the exteriör margin. jB 2 as long as broad. Re 

 and Ri inserted on the same level. Re 3-jointed, about twice as long as Ri, which has 

 about the same length as B. Se of the 1st pair 1, 1, 2, of the 2nd — 4th 1, 1, 3. »Se 

 triangulär, with smooth or almost smooth edges. Se I and Se 2 of /?é; 3 smaller than 

 the other. »SY as long as Re 3; their exteriör margin finely serrated. Longitudinal pro- 

 portion of the 3 joints and St. 



Pairs 



Rel 



iJe2 



iJeS 



St 



1 



10 



10 



15 



22 



2 



13 



13 



24 



30 



3 



13 



13 



28 



40 



4 



12 



12 



30 



30 



Si of the 1st pair 1, 1, 4, of the other 1, 1, b. Ri 2-jointed. Si on the 1st joint 3. 

 »S on the secund joint 6 (1st p.), 8 (2nd and 3rd p.), 7 (4th p.). 



FiftJi. ijair of legs, symmetrical, 3-jointed. i? 1 of both legs unitirig. B 2 one 

 and a half times as long as broad, with 1 short »St'. Äe 1 ~ 3 (the 3rd joint) with 3 ex- 

 teriör spines of equal length and a 4th terminal falcate as long as the joint. 



Description of the male. Body. Length (anterior part 0,8, posterior part 0,4) 

 1,2 mm. Anterior part 5-jointed. Last joint acuminate. Abdomen .5-jointed; proportional 

 length of the joints 1 : 1,4 : 1,4 : 1,2 : 1. Furca somewhat longer than Ab 5 and 3 times 

 longer than broad. St 2 as long as abdomen. 



Antennce of the 1st pair. The left similar to that of the female, the right geniculate 

 and prehensile. The distal part half as long as the proximal, composed of 5 joints. The 

 distal anterior half of An 18 with close denticulation, but without projecting spine; Aa 

 12~16 broader than the other. 



Antennce of the 2nd pair, the m.andibles, the maxilles, maxillipeds and natatory legs 

 similar to those of the female. 



Fifth jynir of legs. The left 4-jointed, longer than the right, 3- (4-) jointed. B 1 

 of the left leg half as long as _B 2; interiör margin of B 2 with a strong gibbosity inside. 

 Re 1 as long as S 2. /?e 2 ~ 3 with subulate apex and 1 small Se. The right with short 

 5 1; /j 2 twice as long as B 1. Re with 1 Si and 2 Se, all small. 



This species is very ncarly akin to Calanapia americana Dahl as far as can be 

 judged from the very fragmentary description (Ber. d. naturf. Ges. zu Freiberg in B. 

 Vol. VIII, pag. 2, Pl. 1, fig. 23 — 26). The latter species, from the mouth of Tocantin, 

 differs, as concerns the female, in the somewhat different .5th p. of legs, on which the 

 3rd »S (not the 4th) is the longest. The male of C. americana differs both in the right 

 antennas and the 5th leg. The proximal part of the prehensile joint projects into a den- 

 ticulate spine. 



]V!I 



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