BULLETIN OF THE BROOKLY TNT. SOC. 75 



On the 

 Pupae of Platysamia gloverii, StrecJcer. ■ 



I received again (this time from Wyoming) a few cocoons of 

 Platysamia gloverii, Strecker, and as I have at hand a number 

 of cecropia cocoons, I have compared the two species. 

 The differences I find are : 



The cocoons of gloverii are of a uniform silvery grey while 

 those of cecropia are of a light brown color. 



In shape the cocoons of gloverii are round at one end and taper 

 at the other while those of cecropia taper at both ends. 



The cocoon of gloverii is a great deal smaller than cecropia, its 

 texture is more compactly spun, consequently the cocoon is firmer. 



On cutting open the outer case of the cocoon of gloverii, we find 

 the inner cocoon, and the inside of the outer case to be of a choc- 

 olate brown color, while in cecropia the color is light yellowish 

 brown. 



The pupae are very much alike, and the only differences I can 

 find are that gloverii is rougher, and darker in color. 



There is now no doubt of the two species being distinct as 

 the differences are well marked in every stage of their existence. 



My friend Mr. 0. Meske of Albany has raised gloverii from 

 the egg, and assures me the larva is totally unlike that of cecropia. 



E'DW. L. GRAEF 



NEW PUBLICATIONS. 



Dimmocks Special Bibliography No. 2. 



Contains Dr. Horn's Entomol. Writings ; is a supplement to 

 Psyche Sept.-Dec. 1878 and Jan. 1879 and also sold separately for 

 20cts (or for 50cts on title-slips). 



S. H. Schidder. The Fossil Insects of the Green Eiver 

 Shales. U. S. Geol. Survey IV. No. 4. art. XXXIII. 



Description of 38 fossil Coleoptera and numerous species of the 

 other orders of Insects found near the Green River Station, Union 

 Pac. R. R. in Wyoming. 



