£82 



Microscopical 



Essays. 



Gripped of thefe, the wing is tranfparent and colourlefs. By the 

 affiftance of the microfcope, we difcover that this dull is a regu- 

 lar afferablage of organized fcales, which will be more particu- 

 larly defcribed hereafter. A few of thefe, as feen in the micro- 

 fcope, are exhibited in Plate i6 s Fig. F E H I. 



The following names are made ufe of to defcribe the different 

 kinds of wings. They are firft diftinguifhed, with refpect. to their 

 furfaces, into superior and inferior. The part next the head 

 is called the anterior part, that neareft the tail the poste- 

 rior part. The interior part is that next the abdomen ; the 

 exterior part is the outermoft edge. 



Thofe wings are termed plicatiles, which are folded when 

 the infect, is at reft, as in the wafp. 



Plants, thofe which are incapable of being folded. 



Erects, whofe fuperior furfaces are brought in contact when 

 the infect, is at reft, as in the ephemera, papiliones, Sec. 



Patentes, if they are extended horizontally when the infecl 

 is at reft, as in the phalasnx geometrae. 



Incumbentes, thofe infects which, when they are not in mo- 

 tion, cover horizontally with their wings the fuperior part of the 

 abdomen. 



Deflex^e ; thefe are alfo incumbentes, but not horizontally, 



the outer edges declining towards the fides. 



q Reverse, 



