129 



This iiew variety, which hitherto luis been regarded by the 

 authors as the true L. Squüla (Linné), may easily be distingiiished 

 from the typical form of Scandinavia by the characters of tlie 

 sliorter ranuis of tlio outer anteniuilar flagellum and of the 2^ 

 legs. Unnecessary to add that it was just tlie larg-e nuniber of 

 specimens at niy disposal which has enabled me to establish the 

 constancy of tlie characters on whicli these varieties are founded. 



Like in tlie typical form, the male has a mmewliat smaller 

 size than the adult, ova-bearing- female : the largest female with 

 eggs from the Goesche Sas is 62 mm. long, the male does not 

 surpass the length of 45 mm. The smallest female with eggs 

 from the Oosterschelde is 51 mm. long, but the ova-bearing 

 females from Tor Bay are much smaller, measuring only 35 to 

 40 mm., a diiïerence of length that we also have observed in 

 the typical foi-m. 



As regards the length of the rostrum (Fig. \o — l^') in propor- 

 tion to the antennal scales, the variety iufeymedia agrees with 

 the typical form, though the rostrum sometimes alroady slightly 

 reaches beyond the scales, a character which in the variety elef/ans 

 is usually observed : in 60 of 98 specimens of the variety infer- 

 iiicdia^ i. e. in 61 per cent., the rostrum appears just as long as 

 the scales, in 25 specimens, i. e. in 25,5 per cent., it reaches 

 only as far as the terminal spine of the scales, but in 13 spe- 

 cimens, i. e. almost in 14 per cent., the rostrum extends alroady 

 0,5 to 1,25 mm. hci/ond their distal extremity. The rostral 

 formulae of 106 sp(>cimens were the following: 



— one specimen, — - — htty three specimens. 



9 + 1 . « + 1 n 



— ^ — one specimen, — - — five specimens. 



9 + 1 . , . 8 -f 1 



- - tourteen specimens, — ^ — one specimen. 



9 + 1 . ^ + ^ .• 



— - — one specimen, — - — hve specimens. 



