38 



MONOGRAPHS OF N. AMERICAN LEPIDOPTERA. 



The growing interest in Entomology, and especially in the study and 

 collection of the Lepidoptera, seems to indicate that a ready means of 

 reference to certain groups which may be chosen for examination, is 

 among the greatest needs of the science to-day. To endeavor to sup- 

 ply this want in the most practical manner, the undersigned have for 

 three years past gathered material, and solicited aid from some of the 

 most eminent entomologists of this and other countries, and with the 

 promise of pecuniary assistance from influential gentlemen in New York, 

 are enabled to announce that they will shortly prepare for publication 

 the monographs hereafter mentioned. These will be issued as rapidly 

 as possible, the editors only pledging themselves to lose little time in 

 placing the various numbers before the entomological public. The 

 price charged for each will be a very small amount above the actual 

 cost, the object being to bring the series within the reach of all who are 

 interested in this branch of Natural History. Though occasionally 

 dealing with insects of other countries, in the case of homogeneous 

 genera, it will be the object of the projectors to pay the greatest atten- 

 tion to the species of the United States, and it is confidendy asserted 

 that with a fair amount of patronage, they will present to the ento- 

 mologists of America one of the most valuable works ever offered to 

 the scientific world. The species of every group treated of will be 

 figured in detail, and as far as known, the earlier stages will be given. 

 The illustrations in colors will be ample and complete, and peculiarities 

 of the structure will always be given in the most careful manner. 

 Though until the present, only privately announced, the scheme now 

 made^public has long occupied the attention and thought of the edi- 

 tors, and they have received promises of support and assistance from 

 many distinguished entomologists. Among the monographs already 

 promised are the following: 



1. The genus Datana, by S. Lowell Elliot and Henry Edwards. 



2. Geometrid^, described since 1875, by Dr. A. S. Packard, Jr. 



3. The genus Ichthyura, by Roland Thaxter. 



4. The family ^geriad^, by Henry Edwards. 



5. The CocHLiOPOD^. (Limacodes, etc.) of the United States, by 



Henry Edwards. 



6. The recendy described species of the Hesperid.^, by Eugene 



M. Aaron. 



7. The genus Arctia, by R. H. Stretch. 



