6 



spt'cii's, are reprinted, so as to give completeness to the work. I am also 

 in(l('l)1c<i lo Messrs. A. 1\. Grote, H. K. Morrison, C. S. Miiiot, and Dr. L. 

 Ilarvey for the examination oi" their types. 



The plates illnslrating the venation and external anatomy have l)e«m 

 drawn i)y Mr. S. M Cassino, under my superintendence. The figures in 

 plate I were drawn l)y myseli' with tiic camera lucida; those of the other 

 nlates were; drawn in tlie sauji^ manner by Mr. Cassino. Most of tiie fiijnrcs 

 are e.xact copies ol the camera-drawings; a lew have been reduced l)y pho- 

 tography. l\v this method it is believed that the drawings are at least 

 approximately correct. In every case I have carefully revised the drawing of 

 the artist. The drawings of the parts of the thorax on plate 7 were drawn by 

 Mr. Cassino with the camera, and then carefully corrected from the sjicci- 

 mens ; but, after all, these drawings of the thorax must be regarded as partly 

 diagrammatic, as they are quite ditiicult to represent in outline. The work, 

 of Mr. L. Trouvelot, of Cambridge, Mass., who drew the moths, speaks tiir 

 itself 



While tliis work is based largely on material contained in the museum 

 of the Peabody Academy of Science, wherein are contained the tyi)es of 

 u(;arly all the new species described l)y me, 1 should state that this work has 

 l)een done as an officer of the Academy ; and to the enlightened views ol'tlie 

 trustees, who believe that one of the primary objects of the institution is 

 the iulvancement of science by the publication of original memoirs, I am 

 indebted for the time placed at my disposal in the preparation of this 

 monogra])h ; the funds of the Academy l)eing too limited to warrant tiie 

 publication of so extended a paper in its memoirs. I also owe much to the 

 kind siiiiii^estions and encouraufement of Prof. F. V. Havden, durinsi: the 

 preparation and publication of the work. 



An essay on the geograjihical distriijiition of the PluiUenulai of this 

 country, and a list of works referring to the family, will follow the descrip- 

 tion of the species. 



Peabody Academy of Scienck, 



iSalcm, j'l/c/.vi-., Aug. 10, 1875. 



