20 Journal New York Entomological Society. [Voi iv. 



The occurrence in the CEdipodinse of stridulation when at rest 

 seems to have been entirely overlooked in late years, though observed by 

 Yersin in (Ed. fasciata. Among the Acridinse Caloptemis italiciis and 

 Melanophi^s femur-rubrnm have been observed by Yersin and Scudder 

 respectively to perform the stridulatory movements, though no sound 

 was noted in either case. Yersin was disposed to believe that all locusts 

 provided with well-developed wing-covers execute such movements, 

 whether accompanied by sound or not. And it is not unlikely that 

 sound is often produced too faint or fine for our ears to perceive. 



Nothing is known of stridulation in the Tettiginae, but it seems 

 possible that it may occur in the same manner, /. e., by friction of the 

 hind thighs on the side of the pronotal process or anterior edge of the 

 wing which in this group take the place of the wing-covers. In the 

 Eremobinoe both sexes are said by Saussure to be often provided with 

 special musical apparatus of two kinds, one used at rest and one in 

 flight and both differing from those here mentioned. 



BOTH SIDES OF BUTTERFLIES. 



By A. P. Morse, Wellesley, Mass. 



Every collector of butterflies and every student of variation in 

 these insects is interested in methods whereby both surfaces of the wings 

 of his favorites can be studied with a minimum amount of labor and in- 

 convenience. Book-boxes, so-called, with glass top and bottom and 

 cork gummed to the glass, answer very well in a permanent collection, 

 but for one which is receiving additions and to whose owner expense is 

 an item to be closely considered, so that an entire case or cases cannot 

 be given up to a species, some method is necessary which will more 

 readily permit of rearrangement when desired. With this end in view 

 I several years ago designed the following plan, which is here presented 

 in the hope that it will be of interest or use to others. While metal 

 strips filled with cork have been used for some time I believe that the 

 method of rearrangement suggested is entirely novel. 



The cases for which the plan was designed are of the standard 

 museum pattern, i6x 19x3 inches outside, 15 x 18 inside measurement, 

 the top and bottom of glass, the sides of wood joined by tongue and 

 groove, the tongue being either of wood or metal. The plan, however, 

 is applicable to almost any form or size of case preferred. Aside from 



