44 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58. 



Genus EPIMECOIDEUS Ashmead. 



Epimecoideus Ashmead, Proc. U. S. Nat. Mus., vol. 23, 1900, p. 52. Genotype. — 

 Epimecoidcus apicalis Ashmead, not described specifically. 



This genus does not occur in North America, and is discussed here 

 only to call attention to its proper position. Ashmead included it in 

 his key to the Lissonotini. It is, however, closely allied to Neothe- 

 ronia Blrieger, so closely that it is doubtful if it is really genorically 

 distinct. Krieger ^ apparentlj^ included two allied species in Neothe- 

 ronia, his aurata and micans. Ashmead 's species is very likely 

 synonymous with micans, but the tips of both front wings of the 

 only specimen are missing and it is impossible to state whether or 

 not it possessed the darker spot in the apex of the radial cell. Other- 

 wise it agrees perfectly with the description of micans. It is from 

 Ecuador, as is also Krieger's species. 



(NEOTHERONIA) EPIMECOIDEUS AURATUS (Krieger). 

 (NEOTHERGNU) EPIMECOIDEUS MICANS (Krieger). 



Genus NEOTHERONIA Krieger. 



Neotheronia Krieger, Sitz. naturf . Ges. Leipzig, 1898, p. 119. Genotype. — Tlieronia 

 tolteca Cresson. 



The lack of aU longitudinal carinae on the propodeum in front of 

 the apical carina and the ma dilation of the wings serve to distinguish 

 this genus from Theronia. To distinguish it from Epimecoideus only 

 the characters used in the key, all of doubtful generic value, have been 

 discovered. 



Very largely neotropical in its range, whence Kiieger^ lists upward 

 of 50 species, this genus is represented in North America by but two 

 species, septe7ntnonalis Krieger and winnamanae Viereck. These 

 two appear to be very likely synonymous, but using Krieger's key 

 and Viereck's types as a basis for comparison the following differences 

 are noted: 



KEY TO NORTH AMERICAN SPECIES. 



Prepectal carina strong above; face at clypeus less than four-fiiths as broad as vertex ; 



first tergite with a dark band across middle winnamanae Viereck. 



Prepectal carina weak above ; face at clypeus four-fifths as broad as vertex; first tergite 



without a dark band septenUrionalis Ki-ieger. 



NEOTHERONIA WINNAMANAE Viereck. 



Neotheronia. winnamanae Viereck, Proc. U. S. Nat. Mus., vol. 44, 1913, p. 567, 

 female. Type.—Q&l. No. 15297, U.S.N.M. 



Viereck separated this species from septemtrionalis Krieger by the 

 difference in the number of antennal joints, the extent of the infuma- 

 tion of the wrings, the presence of a dark band on the first tergite, and 



1 Zeitschr. Hym. Dip., Heft 5, 1905, p. 289. s Idem, Heft 5, 1905, pp. 286-307, 333-338. 



