PROC. ENT. SOC. WASH., VOL. 20, NO. 7, OCT., 1918 141 



Rileya pulchra Ashmead. 



Ashmeadia pulchra Ashmead, Journ. Linn. Soc. Lond. XXV, 1894, p. 1-1"). 



Female. Antennae short, the funicle joints all distinctly broader than 

 long; ocelli very small, the postocellar line a little less than twice the 

 ocellocular line; vertex rather flat; antcnnal depression immargined; 

 antennae inserted apparently a little below the lower extremity of eyes; 

 face below eyes weakly striated; propodeum with a distinct transverse 

 carina which is sharply angulated at the mid'dle, the area before this 

 carina mostly granular with one or two striae medially on each side of 

 middle; area behind the carina longitudinally striated; first tergite about 

 as broad as long; second about two-thirds as long as first; third large; 

 those beyond the third not longer than the first and second combined ; 

 tip of ovipostor exserted. For additional characters see. key. 



Male. The abdominal petiole is as broad as long and distinctly sculp- 

 tured above; first and second tergites small, the margin of the first very 

 indistinct in the specimen at hand; fourth tergite about equal to the first 

 and second combined; following tergites mostly concealed from above. 



Two females and a male in the U. S. N. M. collection from the 

 type series. Collected on the island of St. Vincent, West Indies. 



Rileya heterogaster new species. 



Resembles mellea in general appearance but may be distin- 

 guished at once from that, as well as most of the other species, 

 by the segmentation of the abdomen. 



Female. Length 2.5 mm. Head, viewed from above, three times a ;i 

 broad as long; antennae inserted almost on a line with the lower extremity 

 of eyes; funicle joints all broader than long, the first slightly the longest; 

 distance from antennal depression to apex of clypeus subequal to the dis- 

 tajice from antennal depression to the eye margin; antennal depression 

 not margined and rather shallow; face below eyes distinctly striated and 

 separated from cheeks by a distinct carina which runs along the posterior 

 eye margin nearly to the top of eye; malar space fully twicers long as the 

 width of mandible but less than the length of eye; thorax above a little 

 more strongly sculptured and the axillae slightly more broadly separated 

 at base than in mellea, the anterior margin of scutellum broader than 

 anterior margin of axillae; propodeum with a strong, straight transverse 

 carina before the middle, the surface .before this carina with Longitudinal 

 crenulae, behind the carina rather distinctly striato-rugulose j .il)d<inu i n a 

 little longer than the head and thorax, subsessile, pointed ovate; lir.-l 

 tergite (not counting the very short petiole) small, smooth, and -uhcir- 

 cular in outline; exposed margin of second equal to about one-third of 'he 

 length of the first; third comprising fully two-thirds the length of abdo- 

 men; fourth not longer than the second and about half as long as the fifth. 



