24 ANNALS OF SCOTTISH NATURAL HISTORY 



Lastly, the questions of food and condition, as against 

 the nidus generations, being the primary cause of fish leaving 

 the salt water, still requires more complete treatment, and I 

 think I can lay before the readers of the " Annals " further 

 facts which cannot be easily refuted. The only one spoken 

 of above is that referring to the unseasonal condition of the 

 sea-trout of the two rivers under discussion the Ailort and 

 the Morar in 1900. 



(To be continued.} 



ON A SPECIES OF STENOLOPHUS APPARENTLY 

 NEW TO BRITAIN AND TO SCIENCE. 



By the Rev. H. S. GORHAM, F.Z.S. 



AMONG other Clyde species forwarded by the Rev. A. 

 Thornley to me for identification are two specimens of a 

 StenolopJius taken by Mr. John Dunsmore near Gourock on 

 the Clyde, which, while somewhat resembling ,5". skrini- 

 shiranns, and of the same size, are certainly different. On 

 looking at Schaum's descriptions of this genus in the " Natur- 

 geschichte der Inst. Deuts.," one is naturally drawn to that 

 of wS. discophorus, Fisch., the only one which our insect could 

 possibly be associated with, and which is supposed to have 

 occurred in Germany and in the south of France ; and on 

 examining the collection at the British Museum a species 

 identical with ours stands under the name discopJwrus, Fisch. 

 The insect, however, as I at once observed from Schaum, does 

 not accord with Fischer's species, which has a common blue- 

 black patch on tfie apical half of the elytra, and which, it 

 should also be observed, was described from a N. Siberian 

 insect. I possess specimens of 5. discoplionis from Russia, 

 and I may say at once that our insect and that in the 

 British Museum, attributed to S. France, are a wholly 

 different species. They are to be distinguished from both it 

 and from 6". skrimshiranus, not only by each elytron having 

 a long blackish plagia about half the length of the elytron, 

 not reaching the base or the apex, and leaving the suture 



