AMERICAN HYMENOPTERA. 227 



row is deep; the apex of the clypeus is broadly, roundly bilobate ; the middle 

 being slightly, but distinctly incised. Mandibles and palpi black, opaque; the 

 former sparsely covered with black hairs. The thorax is thickly covered with 

 long black hair, which is shorter and sparser on the mesonotum and longer and 

 denser on the median segment and on the sternum. The scutellum is glabrous. 

 but this may be through rubbing; the post-scutellurn is also without hair; the 

 centre is deeply furrowed, the furrow being much widened at the apex, which is 

 smooth and shining. The black cloud on the base of the fore wings is narrow, 

 it not reaching to the middle of the space bounded by the base of the wings and 

 the transverse basal nervure ; the basal abscissa of the radius is almost straight, 

 not curved, is thickened at the top and has an oblique slope ; the apical abscissa 

 is broadly rounded in the middle; its lower bend is not much longer than the 

 upper; the third cubital cellule is above three-fourths of the length of the sec- 

 ond. The basal part of the median segment is coarsely, irregularly striated ; its 

 apex, in the middle, is more finely and closely transversely striated, and it has a 

 steep oblique slope; its upper side laterally is tuberculate. The spines on the 

 legs are black. The last abdominal segment is thickly covered with black hair. 



Hab. — Pichincha, 11-12,000 feet; Guallabamba to Guachala, 

 7,500 feet. 



Comes near to P. montezumia Smith, from which it differs in the 

 pile on the body being purple, not blue; in the apex of the median 

 segment having an abrupt, oblique slope, whereas in Smith's species 

 it becomes gradually rounded from the base to the apex ; in the 

 lower part of the apical abscissa of the radius being shorter and less 

 oblique, the middle part projecting in the middle, the upper and 

 lower ends being opposite to each other, while in montezumia the 

 upper end is much nearer the apex of the wing than is the lower, 

 and the 3rd cubital cellule above is longer compared with the 2nd. 



Pepsis chilloensis sp. nov. 



Length 24 mm. 9 .—This species has the general coloration and purple bloom 

 of P. andicola,bnt is much smaller; the black basal cloud in both wings is 

 broader; the apex of the clypeus is transverse in the middle, the 2nd cubital 

 cellule is distinctly longer compared with the 3rd, and the thorax is not so 

 densely haired, and the apical tooth of the mandibles is shorter and broader. 



Clypeus sparsely punctured ; its apex broadly transverse, with the sides 

 rounded ; on the top, in the middle, is a broad, shining keel ; the part on either 

 side of this is depressed ; the labrum is brownish at the base, as are also the 

 apices of the mandibles. Median segment thickly covered with long black hair: 

 its apex has a straight, oblique slope ; the metanotum is closely, finely trans- 

 versely striated. The apical abcissa of the radius is roundly curved, the ends of 

 the curve being opposite each other; its middle projects slightly, but distinctly, 

 beyond the middle of the 3rd transverse cubital nervure ; the 2nd cubital cellule 

 is distinctly longer than the 3rd above. The black cloud on the base of the fore 

 wing, on the lower side, extends close to the transverse basal nervure; in the 



TRANS. AM. ENT. SOC, XXIX. JULY, 1903. 



