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



Type locality. Brownsville, Texas. 



Type Cat. No. 21831 U. S. N. M. 



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

 E. G. Smyth from galls of Asphondylia sp. on what Mr. Smyth 

 calls "Mimosa tree" (possibly Leucaena pulverulenta or Mimosa 

 lindheimeri) and recorded under Webster No. 6467, Exp. No. 1. 



The types of Ceratoneura pretiosa Gahan (Proc. U. S. N. M., 

 vol. 48, 1914, p. 165) were reared from the same lot of material 

 as were the types of this species. The Webster number given in 

 the closing paragraph of the original description of C. pretiosa 

 should have been No. 6467 instead of 6480. 



Rileya hegeli, Girault. 



Rileya hegeli Girault, Can. Ent. XLVIII, 1916, p. 340. 



In this species, known only from the unique female type, the head is 

 three times as broad as long as viewed from above; the malar space longer 

 than wicTlh of mandible at base; cheeks not separated from face by a 

 carina; JJie first tergite (excluding the very short petiole) is small and 

 nearly circular in outline, the exposed margin of second and third sub- 

 equal and together about two-thirds as long as the first; the first, second, 

 and third together constitute about one-fourth the length of abdomen; 

 fourth tergite fully twice as long as the three first combined, following 

 tergites combined about equal to the first; propodeum with a distinct 

 transverse carina. 



Type Cat. No. 20324 U. S. N. M., collected at Biscayne Bay, 

 Florida. 



Rileya piercei Crawford. 



Rileya piercei Crawford, Proc. Ent. Wash. XVI, 1914, p. 29. 



Known only from the unique male type. The species is easily distin- 

 guished from all others by the fact that the second visible tergite is much 

 the largest. Head nearly three times as broad as long, antennae inserted 

 above the lower extremity of eyes; funicle joints all broader than long; 

 malar space, about twice as long as the width of mandible; the carina 

 separating cheeks and face not very distinct; postocellar line fully twice 

 as long as the ocellocular line; propodeum with a strong straight trans- 

 verse carina, the surface before this carina rugulose and more or less 

 crenulate, behind the carina longitudinally striate; abdominal petiole 

 broader than long, rugosely sculptured; first tergite more than one-fourth 

 but less than one-third as long as the abdomen, second a little less than 

 twice as long as the first; third approximately two-thirds as long as the 

 first; following tergites concealed from above. 



TypeCat. No. 16701 U. S. N. M., collected on 

 thespesioides, Fish Creek, Arizona. 



