I 71 ) 



No. VIII. 



On the Ephoro?t Leukou^ ufualiy called the White Fly of 

 Pajfaick River. By Dr. Williamson. 



Read Feb. Hf^HESE infcdts are of the order called neu- 

 jt. ^19')- _|_ roptera. Lin. Syf. Nat. 



The eyes are large and prominent. 



The ftemmata are wanting. 



The wings arc plain, patent, membranaceous, reticu- 

 lated. The under wings fhorter and narrower than the 

 upper wings by more than one half. They are attached 

 to the body a little behind and below the upper wings 

 and are nearly covered by them. 



The antennae are cetaceous, half an inch long, having 

 fix articulations befides the bafe. 



From the tail there are two cetaceous appendices about 

 one inch and a half long. They diverge making an 

 angle of 1 2 or 14 degrees. Each of them contains 1 5 

 or 20 fmaJi knots refembling articulations. 



The tail, perhaps of the males, is furnifhed with two 

 fmall crooked filaments hardly one-tenth of an inch in 

 length, that are inferted below the cetaceous appendices, 

 their points turn inward fo as to form pincers. 



The length of the infe£l is half an inch. 



The trunk is not thicker than a grain of rye. The 

 abdomen is much fmaller. 



The wings, abdomen and legs are perfedly white. 



The eyes black ; the trunk of a brownifh colour. 



Their flight in fpeed is nearly equal to that of the 

 dragon flies. 



Neither mouth nor feet could be defcribed from the 

 want of a microfcope. 



They 



