HYMENOPTERA. 309 



parts it is entirely black ; the wings fusco-hyaline, their nervures 

 fusco-ferruginous ; the anterior tarsi brownish beneath, the claws 

 ferruginous. 



Hab. North Carolina. (Coll. W. W. Saunders, Esq.) 



57. Tetralonia bicolor. 



Macrocera bicolor, St. Fary. Hym. ii. 113. 29 $ . 

 Hab. ? 



58. Tetralonia barbata. 



Macrocera barbata, St. Farg. Hym. ii. 112. 28 (? . 

 Hab. ? 



59. Tetralonia atra. 



Macrocera atra, St. Farg. Hym. ii. 112. 26 <? . 

 Hab. ? 



60. Tetralonia nigricornis. 



Macrocera nigricornis, St. Farg. Hym. ii. 107. 21 <? . 

 Hab. ? 



61. Tetralonia cingulata. 



Macrocera cingulata, St. Farg. Hym. ii. 105. 18 ^ . 

 Hab. ? 



Genus 45. MELISSODES. 



Melissodes, Latr. Reg. Anim. v. 354 (1829). 

 Macrocera, Say, Bost. Journ. i. 403 (1837). 



The maxillary palpi 4-jointed, the labial palpi 4-jointed. The 

 ocelli placed in a line on the vertex, the antennae elongate in the 

 males. The anterior wings having one marginal and three sub- 

 marginal cells. 



1. Melissodes pruinosa. B.M. 

 Macrocera pruinosa. Say, Bost. Journ. i. 405. 3. 



Hab. United States (Mount Pleasant, Ohio). 



2. Melissodes rustica. •— — 

 Macrocera rustica. Say, Bost. Journ. i. 406. 4. 

 Hab. North America (Indiana). 



This may possibly be the species described as M. denticulata, 



