\'ol. XXX] ENTOMOLOGICAL NEWS. 229 



Illinois. Dr. H. G. Dyar records the species from Mexico and on the 

 authority of Dr. Skinner from the Mississippi Valley, Dr. W. J. 

 Holland says the species is abundant in Mexico, common in Arizona 

 and not uncommon in Texas. 



On October i8 and 19, 191 1, the writer took fourteen specimens of 

 this species at Champaign, Illinois. Prior to that time and since then 

 no additional specimens of the species have been taken. My attention 

 was first attracted to this butterfly because of its slow low flight, fre- 

 quently interrupted by short stops among the grasses on the ground. 

 Any number of specimens of this pierid might have been captured as 

 they were flying in flocks as certain other butterflies do during migra- 

 tions. The butterflies were flying in a southwesterly direction. — 

 Theodore H. Frison, Champaign, Illinois. 



The Cause of the Delay of Publication of the Selys Catalogue. 



The publication of the Catalogue des Collections Selys has been com- 

 pletely stopped during the war because, in order to proceed with it, it 

 would have been necessary to submit it to the odious German cen- 

 sorship. 



It was not that there was ever any fear that authorization to publish 

 would have been refused us. The enemy, on the contrary, would 

 have asked nothing better than to be able to show publications made 

 in Belgium ; he would have drawn an argument from them to defend 

 his bad cause and make the world believe that the sufferings of the 

 Belgian people were greatly exaggerated, since the intellectuals could 

 continue their work under the shield of the magnanimous occupant ! 



Besides, ever rapacious, he found in the conditions regulating 

 authorizations a source of benefices : whoever published must deliver 

 to the censor a certain number of copies and when works of a certain 

 commercial value were in question, it was extortion erected into a 

 system. Moreover, distribution of copies could only take place through 

 the German booksellers who centralized everything at Leipzig, from 

 which place delivery was made to foreign countries. 



It seemed, in these circumstances, neither dignified nor patriotic 

 (and never would we have consented) to submit the publication of the 

 scientific monument erected to the memory of the great Belgian, that 

 Edm. de Selys Longchamps was, to such shameful merchandising. 



We do not think, moreover, that the delay caused by the war to so 

 many publications, begun or in preparation, constitutes a scientific 

 calamity. Science, who is sometimes invoked to an extent beyond her 

 higher and imprescriptible rights, is rarely injured by delays of publi- 

 cation; often she gains thereby, for the works deferred are frequently 

 better, more finished, more matured. That scientists declare them- 

 selves injured we willingly admit, but that has nothing in common 



