NO. 2173. A REVISION OF THE BEMBICINEWA8P8— PARKER. 37 



except spot below on first pair and stripe on posterior pair, and tarsi, 

 yellow or yellowish white. 



The medial spots on the tergites are decidedly white, as are also 

 those on scutellum and metanotum. The clypeus is a very light 

 yellow and the head is narrower than the thorax. Tlie flagellum, 

 long and slender, is tawny yellowish below, darkening toward the 

 apex; segments 5-11 are faintly carinate posteriorly and the ultimate 

 segment is slightly curved. The pulvilli are large and distinct, the 

 middle femora smooth, and the basal half of the middle metatarsi 

 is curved on its inner sm-face, which is not beset with spines. The 

 second sternite bears two distinct, closely approximated but not 

 large tubercles and the eighth bears a prominent discal spine. The 

 wings are hyaline and the veins fuscous. Pubescence and puiicta- 

 tion are of the normal character. Genital stipes as in figure 58. 



Female. — Black: Labrum, mandibles except apices, clypeus, lower 

 part of frons extended upward between antennae, scape except small 

 spot above, basal segments of flagellum below, V-shaped spot inclos- 

 ing anterior ocellus, broad anterior orbits, posterior orbits broad 

 below, narrower above and prolonged upon vertex, posterior dorsal 

 border and sides of prothorax, lateral lines on scutum, pair of longi- 

 tudinal lines and pair of approximated spots on disk of scutum, 

 fascia narrowed medially on scuteUum, fascia on metanotum, broad 

 curved fascia on dorsum of median segment, lateral angles and sides 

 of same, fasciae on tergites 1-5 similar in pattern to those of the 

 male but better developed and aU continuous except the first, ulti- 

 mate segment both above and below except at base, second sternite, 

 broad fasciae on sternites 3-4 with shallow median emarginations, 

 fascia on fifth biemarginate, legs except stripe above on femora and 

 below on anterior tibiae, yellow. The color is much richer than that 

 on the male. The fiageUum above is dark; below and at the apex 

 taAvny. The wings are clear, less than twice the combined length of 

 the thorax and median segment; the veins are brown. 



Length. — 18 mm. 



Two males of this species before me differ greatly from the type 

 in the extent of the maculations (but not at all in structure). The 

 lii'st, from the same locahty as the type, is a trifle smaller; the yellow 

 on the prothorax is much reduced; the dorsum of the thorax and 

 middle segment is black except a pair of small lateral spots on the 

 scutellum; there is an irregular fine on the mesopleurae, a spot on 

 the metapleurae and another on sides of median segment; the paired 

 median spots on the dorsum of the abdomen are separated from 

 one another and from the lateral spots on aU segments except the 

 sixth; and the black on the sternites and on the legs is somewhat 

 more extended. In a word, the maculations on the specimen are 

 reduced. 



