37b' ARKIV FÖR ZOOLOGI. BAND 1. 



from the distal margins of the joints. Se2 of the 2nd and 3d' 

 p. stronger than the other. St. coarsely serrate, coarser on 

 the 2 — 4 pairs than on the 1st, teeth about 2,8 in 0,01 

 millim. Si 1, 1, 4 of the lst p., of the others 1, 1, 5 — Ei 

 1, 2 and o of eqnal length in the lst pair. Ri 3 of the 2nd 

 and 3d p. as long as Ri 1 + 2, of the 4 p. shorter. Se of the 

 lst pair 0, 0, 1, of the other 0, 0, 2. Si of the lst and 4th 

 p. 1, 2, 5, of the 2nd and 3d pair 1, 2, 6. 



Legs of the öth pair symmetrical. B2 with small Se. 

 Re twice as long as Ri. Re 1 somewhat longer than Re 2, 

 the proximal part protracted into a proximally directed pro- 

 tuberance. Re 2 with strong Si. Re 3 narrow, as long as 

 Re 1 + 2 together. Se 1, 1, 2. St. slightly longer than Re3, 

 its edge serrate; teeth abont 3 in 0,01 millim. Si 0, 1, 4 — 

 Ri 3-jointed, Ri 3 as long as Ri 1 + 2. Se 0. 0, 2, Si 1,1, 4. 

 — Exteriör margin of Re 1 and 2 hairy. 



Corycaeus erythrasus n. sp. 



Diagii. Female Ventral keel in front of the first pair of 

 legs gently convex. Abdomen 2-jointed. Furca rather more 

 than half as long as the other parts of the abdomen together. 

 Posterior part of the genital apertnre with two setee. Eggs 2. 

 Anal segment as long as the genital segment and shorter 

 than the furca. Genital segment laterally in front with a 

 small ventral spine. Length 0,88 — 0,94 mm. 



Male. Abdomen 2-jointed. Genital segment laterally in 

 front with a spine, 3 5 as long as the anal segment and the 

 furca together — Length 0,78 mm. 



Description of the female. Body, anterior part 0,53 to 0.50. 

 posterior part 0,35 mm. in length. Th 3 short, not reaching 

 to the middle of the genital segment, Th 4 small, acute. 

 Abdomen 2-jointed; the genital segment in front with a ven- 

 tral spine. Posterior margin of the genital apertnre with 

 2 S. Eggs 2. Branches of the furca of eqnal breadth through- 

 out, at least 10 times longer than broad. Si half as long 

 as the furca and only slightly longer than the two St. Lon- 

 gitudinal proportion of the abdominal segments and the furca 

 as 1:1: 1,2. 



Antennm of the lst pair. (vjointed. Proportional length 

 of the joints as 10 : 10 : 10 : 15 : 7 : 5. 



Antennm of the 2nd pair. Bl with a strong S, considera- 

 bly longer than B2 — B2 with a S reaching to the distal 





