64 ENTOMOLOGICAL NEWS. [March, 



being as near complete and correct as can be got at present. Bearing in 

 mind the article entitled "Rocks," which appeared in the News some 

 time ago, would not this list be a good foundation for a descriptive work 

 on the Lepidoptera of North America ? Could not the gentlemen who 

 got up this list be induced to publish a work, in monthly parts, containing 

 descriptions and plates of the Heterocera at least, if subscribers enough 

 could be got to ensure them against financial loss? We already have 

 good works on the Butterflies, and they might, therefore, be left out, as 

 also the very small moths. The plates, of course, could not be colored, 

 except at a great cost, but plates such as have been appearing in the 

 News, with a description attached, are every bit as good. A great many 

 who study this subject are business men who have not the time and skill 

 to identify their specimens without the help of plates, and I take it their 

 number would become legion compared to what it is now if such a work 

 could be got at a moderate cost. It may be objected that such a work, 

 when finished, would be incomplete on account of the new species that 

 are being constantly discovered, but if we were to wait ten or even twenty 

 years, the same objection would still hold good. In Europe, where the 

 Lepidoptera have been studied for a great number of years, new species 

 are still being discovered, and in spite of that a new work on the Lepid- 

 optera of Great Britain is just being commenced in London. If you will 

 kindly give this a place in the News it may be the means of helping to 

 make such a work as I suggest a possibility at least, if not a probability 

 of the near future. — ^James Tough, Chicago, 111. 



Identification of Insects (Images) for Subscribers. 



Specimens will be named under the following conditions: ist, The number of speci- 

 mens to be unlimited for each sending ; 2d, The sender to pay all expenses of transporta- 

 tion and the insects to become the property of the American Entomological Society ; 

 3d, Each specimen must have a number attached so that the identification may be an- 

 nounced accordingly. Exotic species named only by special arrangement with the Editor, 

 who should be consulted before specimens are sent. Send a 2 cent stamp with all insects 

 for return of names. Address all packages to Entomological News, Academy Natural 

 Sciences, Logan Square, Philadelphia, Pa. 



Entomological Literature. 



Neunzehnter Jahresbericht des Westfaelischen Provinzial- 

 Vereins fur Wissenschaft und Kunst fur 1890. Muenster, 1891. — 

 Observations on the occurrence of melanism among the macrolepidoptera 

 of the vicinity of Dortmund, K. Meinheit. 



La Nature (Paris), Dec. 26, 1891. — Influence of artificial lights on in- 

 sects, G. A. Poujade; figs. 



