ROHWER: GENERIC NAME CEROPALES I7I 



THE SUN SETS AFTER IT IS DOWN 



Since the virtual wave-length of a given radiation of celestial 

 origin and, therefore, the value of its astronomical refraction 

 is modified by the rotation of the earth, as are also certain scin- 

 tillation phenomena, it follows that the above paradox is not 

 identical with the one just explained. Nevertheless, as the 

 spectra of the stars and other celestial objects all overreach the 

 visible portion at each end it follows that the Doppler effect 

 produces no appreciable alteration in the ensemble of the light 

 from any one — merely a minute shift of its entire spectrum that 

 can be detected only in the positions of definite lines. 



But even this displacement of the spectral lines, due to the 

 rotation of the earth, is far too small, roughly one three-hun- 

 dredth the distance between the sodium D's, to affect detectably 

 astronomical refraction. Hence as the sun, the moon, and the 

 stars all rise before they are up, so too they must all set only after 

 they have gone down. 



ENTOMOLOGY. — The generic name Ceropales Latreille {Hy- 

 menoptera). S. A. Rohwer, Bureau of Entomology. 



In 1915 Morice and Durrant (Trans. Ent. Soc. Lond., 

 1914, pp. 403, 406) synonymize the generic name Ceropales La- 

 treille with the name Arpactus Jurine and propose an entirely 

 new name for those interesting Psammocharid wasps which for 

 more than a century have been known to students under the 

 name Ceropales. This is only one of a number of most discon- 

 certing nomenclatorial changes suggested by these authors 

 because of their study of a discarded book review by Panzer. 

 While the present author is of the opinion that from the nomen- 

 clatorial standpoint there is no way to disregard the Erlangen 

 List, for it is under this name that the Panzerian book review is 

 now commonly known, he does not believe that all of the changes 

 suggested by Morice and Durrant are in accord with the various 

 rules and opinions of the International Commission on Zoological 

 Nomenclature. Since the receipt of the paper by Morice and 



