no. 2173. A REVISION OF THE BEMBICINE WASPS— PARKER. 19 



broad lateral lines and pair of discal lines on scutum, spot on tegulae, 

 spot on base of anterior wings, fascia on anterior margin of scutellum 

 widest laterally, metanotum, curved fascia on dorsum of median 

 segment, pair of triangular spots on its posterior surface, which are 

 sometimes united with the fascia above, its postero-lateral angles and 

 its sides almost wholly, mesopleurse and metapleurse except borders 

 of sutures, mesosternum except pair of lateral spots, fasciae of ter- 

 gites, interrupted medially, the first broad laterally and horseshoe- 

 shaped dorsally on either side of the midline, second to fifth of the 

 same pattern as the first, but with the anterior half of the horseshoe 

 more or less imperfectly developed, sixth broken into four spots, 

 pair of lateral spots on ultimate tergite, sternites 1-5 except medial 

 spots on 2-5, which on 5 and sometimes on 4 are continuous with an 

 anterior black border, the legs except small black spot on posterior 

 side of all femora and black spot on knees prolonged on upper side of 

 posterior tibiae, yellow. 



The flagellum is black, with the underside somewhat testaceous 

 especially toward the apex. Its ultimate segment is slightly curved 

 and obliquely truncate apically. Segments 6 and 10-12 are excavated 

 or pitted and 7-9 are somewhat rounded out below. The middle 

 femora below near the distal end bear a short, blunt, curved tooth. 

 The second sternite basally bears a moderately developed carina. 

 The sixth is black and medially bears a slightly raised, transverse, 

 semicircular area conspicuous for its fine, close punctation. The 

 ultimate tergite is notched at the tip and its lateral angles are devel- 

 oped in the form of short, stout, acutely pointed spines. 



Female. — The female is quite similar to the male in general appear- 

 ance, but to the color description of the male the following additions 

 are necessary: The triangular spots on the posterior surface of the 

 median segment are usually united with the fascia above them; the 

 anterior branches of the horseshoe on the first tergite are extended 

 downward on the anterior surface of the segment; there is a black 

 stripe above on all femora and also on all tibiae; there is a line below 

 on middle femora and also on middle and anterior tibiae; and the 

 black spots on the mesosternum are quite small. The ultimate 

 sternite is black and faintly carinate medially; the ultimate tergite 

 bears a pair of lateral yellow spots and is closely and regularly 

 punctured, showing a slightly rugose appearance and a fairly well- 

 marked longitudinal median ridge. 



In both sexes the discal marks on the scutum are more or less 

 rufous, and the legs are a deeper yellow than the markings of the body. 

 The wings are hyaline and the veins brownish black. The pubescence 

 is short, rather sparse and inconspicuous except on the vertex and on 

 under parts of the thorax. There is but little variation in the mark- 

 ings. 



