r 



North American Hymenoptera. 



371 



segments dark glaucous, without any bright silvery re- 

 flection : posterior pair oftibicc at tip behind, with a fer- 

 ruginous spot. (J More slender, wrinkles of the nieta- 

 thorax less obvious, and the recurrent nervurcs at their 

 entrance Into the second cubital cellule not quite so close 



If 



together. 



Length 9 nearly half an inch. 



The color of the wings, by a particular, obliquely trans- 

 mitted light, is very beautifully pearlaceous and somewhat 

 iridescent. 



2. 1j. peptic a. Black; tergum fasciate with glaucous, 

 reflecting silvery. 



Inhab. Indiana. 



9 Body black ; reflecting silvery, particularly on the 

 head and feet : palpi plceous-yellowish : collar silvery 

 on the posterior margin : thorax and scutel having their 

 sutures reflecting silvery : wivgs hyaline ; nervures honey- 

 yellow ; recurrent nervures moderately near each other 

 at their junction with the second cubital cellule : tergum^ 

 segments excepting the ultimate one, on their posterior 

 margins glaucous reflecting silvery : anal segment with 

 a bright golden reflection : feet black, reflecting silvery ; 

 last tarsal joint rufous. 



Leno;th over half an Inch. 



$ Head and base of the mandibles with a golden re 



flection : anal segment reflecting silvery. 



Length under half an Inch. 



The black tlbi« and tarsi will at once distinguish this 

 species from auniUnta^ F., than which it is also smaller. 



3. L. auruUnta, F. (Larra) Syst. Plez. p. 220. 



