62 ORDER IV. Heinerobms, 



Genus IV. Hemerobius. 

 Linn. Syft. Nat. page 911. 



The mouth of the Hemerobius is armed 

 with two teeth, and has four palpi. 



The ftemmata are wanting. 



The wings are deflected, and not folded, 

 as in the preceding Genus. 



The antennae are fetaceous, advanced 

 before the head, and longer than the 

 thorax. 



The thorax is of a convex form. 



The Hemerobius is fufficiently diftinguifhed 

 from the Ephemera and Phryganea, by the po- 

 fidon and formation of its mouth, which ad- 

 vances forwards, and is armed with teeth. 



The Antennse diftinguifh it from the fol- 

 lowing Genera belonging to this order. 



Schasffer obferves, that the abdomen grows (len- 

 der towards its extremity, that the wings are in 

 fome fubjedts incumbent > in others dejiefled, and 



that 



