58 



REVIEWS. 



but such a conclusion seems scarcely borne out by the data, as we have 

 collected them in the annexed table : 



We may here observe that since the completion of Zetterstedt's work in 

 1852, more species appear to have been added to the Swedish Diptera 

 than have been to the British since 1851, when the first volume of the 

 "Insecta Britannica" was published, if we may judge from a comparison of 

 one or two of the principal families included in each. Thus, the Dolicho- 

 pidce have been increased by two with us, and as many for Sweden ; 

 the Empidce by three for Sweden, and none here. Curtis, in his Guide, 



