PROC. ENT. SOC. WASH., 'VOL. 20, XO. 7, OCT., 1918 149 



This species is represented in the National Museum by the 

 allotype female and three paratypes of which one is a male; all 

 from Jacksonville, Florida. The type is a male and is believed 

 to be in the collection of the Kansas State Agricultural College 

 at Manhattan, Kansas. This type has not been examined. 



Rileya similaris, new species. 



Female. Length 2.25 mm. Differs from the description of tegularis 

 as follows; the middle of face is slightly more shining, not quite as strongly 

 sculptured; striations at sides of face slightly coarser; margination of 

 antennal depression a little stronger; postocellar line a little less than 

 twice the ocellocular line; pronotum with dorsal lateral margins sharply 

 angulated and more or less distinctly carinately margined; scutellum 

 with a rather distinct transverse ridge at, or a little behind, the apical 

 one-third; propodeum rugose, with a transverse carina which is sharply 

 angulated at the middle, the apex of angulation touching the basal margin 

 of propodeum, the area before the transverse carina and lying between 

 the median line and the spiracle with two more or less irregular longi- 

 tudinal carinae, the area behind the transverse carina coarsely striated; 

 postmarginal vein two-thirds the length of marginal and nearly twice 

 as long as stigmal; three basal tergites (not counting the very short petiole) 

 small; exposed margin of second tergite not more than one-third as long 

 as the first; third full}' twice as long as the second, its apex at about the 

 basal one-third of abdomen; fourth large; tergites beyond the fourth 

 together about equal in length to the first; tip of ovipositor exposed. 

 Tegulae and scape pale reddish-testaceous; flagellum fusco-testaceous; 

 otherwise the color is like tegularis except that the trochanters are pale 

 testaceous like the knees and tarsi and the tibiae are not conspicuously 

 brownish medially. 



Male. Length 2.2 mm'. Postocellar line twice as long as the ocel- 

 locular line; abdominal petiole broader than long and rugose above; first 

 tergite (not counting the petiole) broader than long; second about one- 

 third as long as the first; third about equal in length to the first and sec- 

 ond combined and extending to the middle of abdomen; fourth equal to 

 the second and third combined; fifth about equal to the first; following ter- 

 gites concealed from above. Agrees with the female in other characters. 



Type locality. Brownsville, Texas. 



Type. Cat, No. 21833 U. S. N. M. 



Host. AsphondyUa sp. 



Type, allotype, and a large number of paratypes reared July 

 3-15, 1912, by E. G. Smyth from galls on the' "Mimosa tree" 

 (possibly Leucaena pulverulenta or Mimosa lindheimeri) and 

 recorded in the Bureau of Entomology under Webster No. 6467, 

 Exp. Nos. 1 and 2. 



