no. 2173. A REVISION OF THE BEMBICINE WASPS— PARKER. 29 



ing a Y-shaped spot below the anterior ocellus, scape and first seg- 

 ment of flagellum, second below, posterior orbits broad below and 

 continued across the posterior border of the vertex, prothorax except 

 a broad anterior dorsal spot undulate on posterior margin, tubercles, 

 tegulae, U-shaped discal mark on scutum interrupted at posterior 

 middle, broad lateral lines on scutum continuous with the broad 

 curved fascia on scutellum, metanotum, curved fascia on dorsum 

 of median segment, sides of same continued over lateral angles onto 

 posterior surface, mesopleurae except curved spot behind tubercles 

 and large spot in front of middle coxae and separated from its fellow 

 by a broad median line on mesosternum, metapleurae, fasciae on ter- 

 gites, all continuous and fashioned like those of the male, but lacking 

 the lateral black spot on second and yellow spot on third, apex of 

 ultimate tergite, first sternite except lateral spots, triangular spots 

 on posterior lateral angles of sternites 2-5 successively smaller, 

 apical edges of ultimate sternite, coxae, trochanters except spot above, 

 tibiae except spot below, smallest or wanting on posterior pair, and 

 tarsi, yellow. The posterior border of the middle femora is curved 

 so that when seen from below the segment appears much wider in 

 the middle than at either end. The middle tibiae are somewhat 

 dilated apically, but much less so than in the male. 



Length. — 17-20 mm. 



The wings in both sexes are hyaline, relatively short, and the veins 

 are brown. The legs are strong and the tibiae and tarsi very spiny. 

 The tarsal combs are strongly developed in the female but are practi- 

 cally wanting in the male. The pubescence is white, short, sparse, 

 and inconspicuous even on the male. The color of the markings is a 

 lemon yellow lighter on the head and abdomen than on the thorax 

 and darker on the legs. The labrum, the apical half of the clypeus 

 and the anterior orbits of the female are very light, almost white on 

 one specimen. The lateral spots on the sternites may or may not be 

 connected apically by narrow lines. One male is smaller and more 

 slender than the other two; the thorax and median segment are im- 

 maculate above except for narrow broken line on scutellum; the 

 extent of the yellow on sides of prothorax and sides of thorax and 

 median segment is greatly reduced. The fasciae on the first three 

 tergites are widely interrupted, leaving a pair of medial spots on two 

 and three; the remaining three are more or less completely interrupted 

 on either side the midline, leaving a median spot. Structurally it 

 shows no variation whatever. Judging from Cameron's description 

 of the male he referred to speciosa, his specimen must have been very 

 similar to this one. 



Handlirsch considered this species identical with speciosa Cresson 

 and accordingly placed it as a synonym under that species. As far 

 as I can discover it has been so regarded by others since that time, but 



