286 BULLETIN 15, UNITED STATES NATIONAL MUSEUM. 



Antennte 10-jointed iu both sexes, the scape much lengthened, cla- 

 vate; club iu female -i-joiuted, the fuuiclar joints slender: in male 5- 

 joiiited, the joints cylindrical. 



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

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

 minute tubercle, rarely entirely wanting, and usually pubescent; met- 

 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 $ , the first 

 segment a little wider than long, j)ubescent, the second very large. 



Legs elavate, the basal joint of hiud tarsi tAvice or a little more than 

 twice as long as the second. 



TABLE OF SPECJIES. 



FEMALES. 



Mesonotum Tvitbout furrows, or these only indicated posteriorly 2 



Mesonotum with delicate but complete furrows. 

 Coxa^ black. 



Legs brown black. 



Antenna' black, iirst and third fuuiclar joints small. ...S. niuuipes. sp. nov. 

 Legs pale rufous, i)osteri()r femora dusky. 



Antenuio pale brown, the scape rufous 8. kufipes, sp. nov. 



Coxa' pale. 



Legs jiale brown. 

 Antenna' dark brown, first and second fuuiclar joints slender, cyliudric, 



nearly equal S. inermis Ashm. 



2. Mesouotal fui-rows indicated posteriorly. 

 Coxie brownish-i)iceous. 

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

 tip obfuscated, with sometimes all femora dusky. 

 Antenna' pale brown, tip of scape and the club dusky, joints 1 and 3 of 



fnnicle shorter than the second S. coknicola, sp. nov. 



Legs, includiug coxte, uniformly brownish yellow, rarely with posterior 

 femora dusky. 

 Antennie dark brown, the fii'st three fuuiclar joints longer than thick, the 



first the shortest S. ANTEXNARI.E, sp. nov. 



Mesonotal furrows entirely wanting. 

 Coxie black. 

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

 femora and tibi?e dusky or black. 

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



Synopeas nigripes, sp. nov. 



(? . Length, 1'" '. Black, shining, with a microscopic sculi)ture; the 

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

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

 the tiagellum 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; sou- 



