xo. 2173. A REVISION OF THE BEMBICINE WASPS— PARKER. 39 



The four males before me show an unusual amount of variation 

 itoth in the maculations and in the color of same. On one specimen 

 the body markings are decidedly white; on others bright lemon 

 yellow. On a specimen from Kansas the dorsal fasciae are com- 

 paratively broad and only the first is narrowly interrupted. On the 

 same specimen there is a large spot on sides of pro thorax. Another 

 specimen from the same State shows a short pair of lateral lines on 

 the scutum. The antennae shovv^ no special modifications; the middle 

 femora are smooth below; the middle metatarsi are cm'ved on the 

 imier side medially and basally on the same side bear a row of about 

 five or six comparatively stout spines. The second sternite bears a 

 pair of short, pointed, prominent tubercles and the eighth a discal 

 spine. 



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

 between antennae, scape below, very small spot in front of anterior 

 ocellus extended sMghtly upon the vertex, very broad anterior orbits, 

 moderately broad posterior orbits, pair of transverse spots on pos- 

 terior border of pronotum, tubercles, spot on sides of prothorax, teg- 

 ulae, usually short lateral lines above base of wings on scutum, lateral 

 spots on scutellmn narrowed medially and more or less approxi- 

 mated, fascia on metanotum, spot on sides near lateral angles of 

 median segment, rarely small spot on metaplem'ae, broad fasciae on 

 tergites 1-5, first interrupted medially and anteriorly deeply emar- 

 ginate in the middle, in some specimens cut through in such fashion 

 as to leave a median posterior pair of spots, fasciae 2-5 biemarginate 

 anteriorly on dorsum of tergite, apex of ultimate tergite and steniite, 

 lateral spots on sternites 2-5, and small median posterior spots on 

 3-4, white or faintly yellowish white. Femora more or less, tibiae 

 except spot below, and tarsi, yellow. The tarsi are more or less 

 testaceous, especially the posterior pair. The first and also the sec- 

 ond segment of the flagellum may be yellowish below. On some 

 specimens the median abdominal ventral spots are wanting; on 

 others the lateral spots are connected by apical lines. 



Length. — 15-18 mm. 



In both sexes the head is narrower than the thorax and the white, 

 dense, rather short pubescence on the head, thorax and base of abdo- 

 men is somewhat better developed on the male than on the female. 

 The pulvilh are distinct in both sexes. The wings are slightly in- 

 fumated and the width of the second cubital cell on the radial vein 

 is about haK its width on the cubitus. 



It seems highly probable that Handhrsch's mamillata is identical 

 with this species, and I have so considered it. In his description of 

 the male Cresson makes no mention of tubercles on the second ster- 

 nite. I have, however, examined the specimens of this species in the 

 collection of the American Entomological Society of Philadelphia, 



