378 ARKIV FÖR ZOOLOGI. BAND 1. 



Antennce of the lst pair 6-jointed. Proportional length 

 of the joints 10 : 8 : 10 : 12 : 7 : 5. 



Antennce of the 2nd pair. Bl with a S reaching soine- 

 what beyond tlie distal margin of B2. — B2 with a plurnose 

 S reaching to the margin of the joint, which ends in a trian- 

 gulär tooth, behind which are some smaller teeth. — Ter- 

 minal claw strong, as ]ong as the limb. 



Maxilliped 2 with a claw reaching to the proximal end 

 of Bl. Exteriör margin of B2 entire. 



Natatory tegs. Longitudinal proportion of the joints of 

 Re and St. 



Rel Re2 Ee3 St. 



1 p. ... 10 9 22 26 



2 p. ... 10 10 30 25 



3 p. . . .10 10 28 28 



4 p. ... 10 7 10 25 



Relative length of Re of the fonr pairs as 10 : 12, 6 : 12 : 

 5, 6 Se of the lst— 3d p. 1, 1, 3, of the 4th p. 1, 0, 1, the 

 Se of the lst — 3d p. triangulär, with serrate margins. The 

 Se of Reo of the 2nd and 3d p. divide the joint in three 

 equal parts. St of the lst and 2nd p. straight, of the 3d p. 

 outwards curved, all knife-like, with finely serrate margins. 

 St of the 4th p. bristle-like. — Si of the lst p. 0, 1, 4, of 

 the 2nd and 3d 0, 2, 5, of the 4th p. 0, 1, 5. — Longitudinal 

 proportion of the joints of Ri 



Ril EiS Ri3 



1 p 10 10 17 



2 p 10 12 22 



3 p 10 10 10 



Ri of the 4th p. rudimentary, with 2 plumose S. Pro- 

 portional length of Ri of the three pairs as 10 : 13 : 9. — Ri 

 of the lst and 2nd p. somewhat longer than the half of Re, 

 that of the 3d p. shorter. — Si of Ri of the lst p. 1, 1, 5 

 of the 2nd 1, 2, 4 of the 3d 1, 2, 2. 



LaMdocera similis n. sp. 



Diagii. Female. Front laterally rounded, without crista 

 and hook. Head with a spine on each side. Last thoracic 

 segment symmetrical, ending in triangulär lobes. Abdomen 

 3-jointed. Genital segment dorsally with a large apophysis. 



