

BOSTON 



JOURNAL OF NATURAL HISTORY. 



Vol. I. MAY, 1836. No. 3. 



ART. XIII.— DESCRIPTIONS OF NEW SPECIES OF NORTH 

 AMERICAN HYMENOPTERA. AND OBSERVATIONS ON 

 SOME ALREADY DESCRIBED. <By Thomas Say. Com- 

 municated Feb. 1835. 



J 



FAMILY TEJ^THREDIJSTETJE, 



Genus AcoitDULECERAj Say. 



J 



ARTIFICIAL CHARACTER. 



^ 



ANTENNiE filiform, 6-jointed, short j radial cellule 

 one ; cubital cellules three, the second smallest. 



NATURAL CHARACTER. 



Antennffi slx-joInted ; 1st and 2d joints subequal, the 

 second larger ; third joint longest but equal to the follow- 

 ing ones in diameter ; remaining joints gradually shorter ; 

 terminal joint not longer than the second : mandibles 

 arcuated, acute ; a prominent tooth on their middle : 

 labrura prominent and distinct: radial cellule rather 

 large : cubital cellules three ; first elongated, as long 



V 



VOL. I. PART III. 



28 



