122 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 75 



SPBCIMENS EXAMINED 



Nhw Mesico: Albuquerque (1894, F. H. Snow). 



BEMBIX GRADILIS, new species 



Type (male). — Black: labrum; mandibles, except tips; clypeus; 

 scape below; lower part of frons extended upward from between 

 the antennae; broad anterior orbits shortened above; transverse 

 series of three spots below anterior ocellus; narrow posterior orbits; 

 narrow posterior border of pronotum continued on tubercles; spot 

 on sides of prothorax; small lateral spot above base of wings and 

 pair of short, narrow discal lines on scutum; lateral spots on scutel- 

 lum ; fascia on metanotum ; short oblique lateral lines on dorsum of 

 propodeum; spot on lateral angles of propodeum; small spot on 

 metapleura; narrow vertical line broken into two spots on meso- 

 pleura; interrupted fasciae on tergites 1-5, all except the first more 

 or less broadly bisinuate on anterior border ; lateral spots on sternites 

 2-5, decreasing in size from two to five ; conspicuous spot on anterior 

 coxae; femora, except black line above on all and short line below 

 on second and third pairs; tibiae; and tarsi; yelloio. The lateral 

 spots on the scutellum and fascia on metanotum are wliite. 



The flagellum is black above, somewhat testaceous below, and its 

 segments are all without modifications. The middle femora are 

 weakly dentate below. The second sternite bears a median longi- 

 tudinal carina that may be regarded as a poorly developed tubercle. 

 The sixth sternite bears a small, short, sharp-pointed, median process 

 and the seventh is carinate on the midline. The wings are hyaline. 

 The pubescence is normal in development, being longest on head, 

 thorax, and propodeum. The paratype differs from the type in 

 lacking discal lines on the scutum and spots on the lateral angles 

 of the propodeum, and in having the maculations on the mesothorax 

 reduced. 



This species runs in Handlirsch's table to B&iiibex inops Hand- 

 lirsch and it is possible that this may be only a yellow form of 

 that species. All maculations, except those on the scutellum and 

 metanotum, are bright yellow and the genital stipes in form differs 

 somewhat from the figure given by Handlirsch of the stipes of inops. 



Length 16 mm. Described from two males (type and paratype) 

 bearing the label, " Paso del Libres Carrientes, Argentina, January 

 12-14, 1920, Cornell Univ. Exped." 



Type. — In the collection of Cornell University. 



BEMBIX SPINOLAE Lepeletier 



Benibex spinolae Lbbeilbtiee, Hist. Nat., vol. 3, 1845, p. 227. 

 Bembex fasciafa Dahlbom, Hym. Eur., vol. 1, 1845, p. 487. 



