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PROCEEDINGS OF THE NATIONAL MUSEUM. 



Most of the structural variations and to some extent those of color 

 accompany variation in size. The following description is drawn 

 from a female and a male of average size, while the observations on 

 variation are based on the entire series of two hundred or more 

 specimens with special reference to the largest and smallest specimens 

 of each sex available, the character of the smallest being stated first 

 in each case : 



Female. — Clypeus very broadly rounded at apex; malar space 

 about one-third as long as basal width of mandible; vertex slightly 



Fia. 1.— EPHIALTES (ITOPLECTIS) CONQITISITOR (SAY). 



wider than face ; eyes deeply emarginate ; antennae about two-thirds 

 as long as body, barely attenuate toward base, lower margins of 

 their foramina distinctly above middle of eye ; front shallow, weakly 

 ruguloso-punctate medially; diameter of lateral ocellus distinctly 

 longer than ocell-ocular line, the latter barely more than half as 

 long as post-ocellar line; notauli barely indicated; propodeum pol- 

 ished medially and apically, otherwise punctured, the punctures fad- 

 ing out gradually and becoming obsolete in front of the spiracle, the 

 latter broad oval; first tergite very slightly longer than second; 

 ovipositor little more than one-third as long as abdomen. 



