60 Dr. A. S. Packard. Jr's Revision of the 



B. Species small, not over half an inch long, wings clear, clypeus en- 

 tire, occasionally scarcely raised. 



%. Basal ring red, supra-clypeal piece yellow: femora 

 black, tipped with yellow; scutellum bipuuc- 

 tate C. rufinoda, Cresson. 



9- Two basal abdominal rings red, posteriorly black. .C. rufopicta, Smith. 



9 • Femora rust red, supra-clypeal piece black, abdo- 

 men banded with yellow C. Blakei, Cresson. 



9- Scutellum bipunctate, black species; femora black, 

 broadly tipped with yellow, basal ring an in- 

 terrupted yellow band C. finitima, Cresson. 



% . Abdomen red posteriorly, two large acute connate 



yellow spots C. hilunata, Cresson. 



9- Small, black, basal abdominal ring yellow, an- 

 tennae red, anterior femora yellow, posterior 

 pair black, tipped with yellow C. cubensis, Cresson. 



9. Front black above the clypeus, which is mostly 

 yellow, propodeumbimaculatewith yellow, an- 

 tenna blackish, legs black C. nigrescens. Smith. 



9 • Antennae light fuscous, femora yellow C. occipitomaculata, Pack. 



9 • Clypeus smaller, raised, with two yellow dots, baso- 



abdominal ring yellow C. dentifrons, Cresson. 



% . Clypeus broad, round, smooth, front yellow: baso- 

 abdominal ring black; fore femora tipped with 

 yellow, posterior jjair yellow at base C. deserta. Say. 



% . Body more closely punctured, antennae redder 



than in deserta C. imitator, Cresson. 



% . Stouter, clypeus rounder, hind femora entirely 



black C. compar, Cresson. 



9 . Femora red; clypeus black, with two small gemi- 

 nate dots C. fulvipes, Cresson. 



9 . Body stouter, head larger than preceding; clypeus 



lunate yellow, basal ring of abdomen black C. compacta, Cresson. 



% . Body very short, front entirely yellow, two pairs 

 of anterior femora reddish, hind edge of first 

 abdominal ring fuscous; thorax black C. californica, Cresson. 



%. Orbits yellow, supra-clypeal ruga? black, basal 

 ring of abdomen black, lateral streaks on third, 

 femora black, tipped with yellow, a small spe- 

 cies C. Kennicottii, Cresson. 



%. Second abdominal ring black, front yellow; fe- 

 mora yellow C. insolitus, Cresson. 



Cerceris fumipennis, Say. 



C. fumipennis, Say. Bost. Jour. Xat. Hist. i. p. 381. (1837.) 



C. cincta, Klug et Erich., Dahlb. Hym. Eur. i. p. 204 % . (1845.) 



Smith, Cat. Hym. Br. Mus. iv. p. -438. (1856.) 

 C. fumipennis, Cresson, Proc. v. p. 113. (1865.) 

 Mass., Middle States and Louisiana, (Coll. Ent. Soc. Phil.) Florida, 

 District Columbia, (^Norton). 



