50 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



tion is based upon the male. It appears that he did not have a 

 female of the species. Of the females that I have referred to this 

 species neither clypeus nor labrum shows any trace of black marks. 

 Of the males, at one extreme of the series the clypeus is almost 

 entirely black and there is a broad black band across the base of the 

 labrum; at the other extreme both clypeus and labrum are entirely 

 free from black marks of any kind. If I had had only the two 

 extremes of this series before me, I should have hesitated to include 

 them in a single species, but the series shows such a gradual transi- 

 tion from one extreme to the other as to make it impossible to sepa- 

 rate the series into two groups, since the variations in the series 

 with respect to other characters bear no relation to this variation 

 in the maculation of the clypeus and labrum. All specimens that I 

 have referred to this species, both male and female, agree in having 

 the hind femora ferruginous and black and the apical borders of 

 the tergites rufous. Since the specimens referred to this species by 

 Handlirsch also bore these characters, I am convinced of the cor- 

 rectness of his determination. I have at hand 1-1 males and 5 females. 



SPECIMENS EXAMINED 



Mbxioo: Cuautla (October 30, 1922, E. G. Smyth, also November 4, 1922); 

 "Dist. Fedrl" (J. R. Inda) ; Guanajuato (A. Duges) ; Mitla (May 2, 1904, 

 L. O. Hov?ard). 



STENIOLIA ELEGANS, new species 



Ty'pe (male). — Black: clypeus; labrum; mandibles, except apices; 

 scape below; space between antennae; broad anterior orbits nar- 

 rowed to a point above; V-shaped spot below anterior ocellus; nar- 

 row posterior orbits broad below; posterior border of pronotum; 

 tubercles ; spot on sides of prothorax ; pair of lateral spots and pair 

 of small discal spots on scutum ; triangular lateral spots on scutellum : 

 fascia on posterior border of metanotum; pair of oblique lines on 

 dorsum of propodeum prolonged on its posterior surface; sides of 

 propodeum almost entirely: narrow stripe broken into three spots 

 on anterior of mesopleura ; fasciae on tergites 1-5 broken into a pair 

 cf rounded discal spots and a pair of sinuate lateral spots, of which 

 those on one and two are very broad ; fascia on tergite 6 interrupted 

 and bisinuate on either side the midline; apex of seventh; fasciae 

 on sternites 1-6, that on second very board, and those on second and 

 third very narrowly interrupted at midline ; legs except trochanters, 

 coxae basally, black line above and below on femora, and black line 

 above on middle and anterior tibiae ; yelloio or white. The dorsal 

 markings of the abdomen are white with the extreme lateral ends of 

 the lateral markings tinged with yellow. Elsewhere the markings 

 are a bright lemon yellow. 



