286 BULLETIN 15, UNITED STATES NATIONAL MUSEUM. 



AnteiuiK' 10 Jointed in botli sexes, the S('ai>e nuich lenjithened, cla- 

 vate; club in female 4-jointed. the funiclar joints slender; in male ii- 

 jointed, the joints cylindrical. 



Thorax ovoid, convex, the mesonotnm with or without furrows; scu- 

 telluiu broad, subconvex, bifoveolated at base, the tip ending in a 

 minute tubercle, rarely entirely wantinj;, and usually pubescent; niet- 

 athorax very short, channeled at the middle, the metapleura usually 

 densely pubescent. Wings, veinless, pubescent. 



Abdomen, oblong-oval, the apex a little more pointed in the 9 , the first 

 segment a little wider than long, pubescent, the second very large. 



Legs clavate, the basal joint of hind tarsi twice or a little more than 

 twice as long as the second. 



TABLE OF SPECIES. 



FKMALK.S. 



Alesoiiotnni witliout furrows, or tbest- only indicated ]»osteriorly 2 



Mesonotnm with delicate bnt coiui»lete furrows. 

 Coxa' black. 



Legs brown black. 

 * Antenna' black, first and third funiclar joints small... S. nigripks, sp. nov. 



Legs pale rufous, jiosterior femora dusky. 



Anteunai pale brown, the scape rufous S. nuFiPES, sp. nov. 



Coxa' pale. 



Legs pale brown. 

 Antenna' dark brown, tirst and second funiclar joints slender, cylindrio, 



nearly equal S. iNEK.Mis Ashm. 



2. Mesouotal furrows indicated posteriorly. 

 Coxa' brownish-piceous. 

 Legs yellowish brown or brownish yellow, the posterior femora and tibia; at 

 tip obfuscated, with sometimes all feuu)ra dusky. 

 Antenna- ])ah' brown, tip of scape and the club dusky, Joiufi* I and 3 of 



funicle shorter than the second S. cokxuola, sp. nov. 



Legs, including coxse, uniformly brownish yellow, rarely with posterior 

 femora dusky. 

 AntennsB dark brown, the lirst three funiclar joints longer than thick, the 



first the shortest S. antexxakijc, sp. nov. 



Mesouotal furrows entirely wanting. 

 Coxa> black. 

 Legs reddish yellow or honey yellow, the middle femora and the posterior 

 femora and tibise dusky or black. 

 Scape rufous, the llagellum brown S. rufiscapus, sp. nov. 



Synopeas nigripes, sp. nov. , ■ 



S . Length, l'"". Black, shining, with a microscopic sculpture; the 

 face highly polished, with a median impressed line ; lateral ocelli twice 

 their width from the margin of the eye. Antennae 10-jointed, black, 

 the flagellum thickened toward the apex, covered with sparse white 

 hairs; pedicel as long as the first and second funiclar joints together, 

 the first funiclar joint small, rounded ; club joints, except the last, longer 

 than wide, the last ovate. Mesonotum with 2 delicate furrows; scu- 



