248 PROCEEDINGS OF THE NATIONAL iMUSEUM. vol.49. 



large punctures; ocelli in a low triangle; postocellar line slightly- 

 shorter than the ocellocular line; the intraocellar area raised; meso- 

 notum finely punctured with a number of large close punctiu^es which 

 are denser anteriorly; scutellum punctured like the mesonotum; 

 mesepisternum punctured like the mesonotum; propodeum finely- 

 punctured; dorsal aspect separated from the posterior aspect by 

 a carina, apically the dorsal aspect has tlu'ee carmae which are 

 united in such manner as to form a double U, which is open 

 anteriorly; legs practically without spines; venation normal; the 

 third cubital cell very narrow on the radius, the distance between the 

 second and third transverse cubiti being subequal with the distance 

 between the second transverse cubitus and the first recurrent vein; 

 abdomen shiny, a number of small, well defined and well separated 

 punctures; pygidium about one and one-half times as long as broad, 

 the apical margin nearly rounded. Black; narrow posterior margin 

 of the pronotum, tubercule, two spots on the scutellum, elongate lat- 

 eral spots, bands on the tergites from the first to the fourth inclusive 

 (those on the first and second segments are broad) white; first abdomi- 

 nal segment, except where mentioned, and the posterior femora 

 rufous; densely clothed with yellow pile which is denser on the front 

 and cheeks; wings dusky hyaline; venation dark brown; antennae 

 slightly thickening apically, the third and fourth joints subequal in 

 length. 



Mayaguez, Porto Rico. Described from one female collected Jan- 

 uary 27, 1912, by C. W. Hooker. 



Type.— C&t. No. 15082. U.S.N.M. 



Genus CERCERIS Latreille. 



CERCERIS MARGARETELLA, new species. 



Apparently related to Cerceris f estiva Cresson, but may be readily 

 separated from that species by the different colored antennae and 

 the yellow propodeal inclosure. 



Male. — Length, 9.5 mm. Clypeus gently convex ; anterior margin 

 feebly crenulate; frontal carnia strong; ocelli in a low triangle; 

 postocellar line a little shorter than the ocellocular line; head 

 closely, regularly punctured except the area around and inclosed 

 by the ocelli, which is shiny, but more sparsly punctured; antennae 

 normal, third joint subequal in length to the fourth; mesne turn 

 shiny, with a few irregular punctures; mesopleura with rather large, 

 close punctures; propodeal inclosure shiny, impunctuate; propo- 

 deum shiny, with a few widely scattered punctures; sternellum 

 rectangular in outline and without a triangularly shaped depression; 

 abdomen shmy, with a few scattered punctures; pygidium about 

 one and one-half times as long as broad, nearly parallel-sided, the 

 apex truncate; last ventral abdominal segment deeply, arcuately 



