DESCRIPTION. 



Head with a compressed, elevated, scale-like 

 tooth at the inner base of each antenna : antennse, 

 tenth joint and half of the ninth joint white: 

 wings, nervures and costal margin fuscous : feet, 

 two anterior pairs blackish-piceous ; posterior 

 pair black, polished, the tibia much dilated at 

 tip and much dilated on the inner side, the tarsi 

 piceous. 



OBSERVATIONS. 



A truly singular insect, not uncommon in 

 various parts of the United States. Its flight is 

 slow and awkward, and when taken it endea- 

 vours to force the point of the abdomen through 

 the skin of the hand, but its strength not ade- 

 quate to the task. The whole abdomen resem- 

 bles a much elongated pedicle, from which the 

 abdomen itself, or dilated portion, has been acci- 

 dentally removed. 



The plate exhibits two views of the insect, 

 natural size, and a wing somewhat magnified, to 

 show the arrangement of the nervures. 



PLATE XV. 



