PHILANTHUS. 



GENERIC CHARACTER. 



Labrum concealed; eyes not extending to 

 the posterior part of the head, very slightly 

 emarginate ; stemmata three ; antennae thicker 

 towards the tip, inserted in the middle of the 

 face ; nasus trilobate ; mandibles simple ; radial 

 cell one, elongated, acute at tip ; cubital cells 

 three, the first large, the second small, sessile, 

 receiving the first recurrent nervure, the third 

 subquadrate, elongated at its exterior inferior 

 angle and receiving the second recurrent ner- 

 vure, an imperfect fourth cellule sometimes 

 exists ; feet rather short. 



OBSERVATIONS. 



In the present order of insects called Hyme- 

 NOPTERA by Linne, are many species whose 

 manners are highly interesting ; living together 

 harmoniously in large communities, and labour- 

 ing for the attainment of a common object, 

 such species exhibit such eminent proofs of 



PLATE 49. 



