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. Farg. Hym. ii. 113. 29 J . 

 Hab. ? 



58. TETRALONIA BARBATA. 



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

 Hab. ? 



59. TETRALONIA ATRA. 



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

 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, 



