‘ Challenger’ Hymenoptera. 407 
of the body more or less clothed with short grey hair, which is 
especially dense upon the metathorax ; clypeus narrowly bor- 
dered below with yellow, and the mouth-parts, above the closed 
mandibles, of the same colour ; mandibles black, the extreme 
tips red; abdomen with the first two dorsal segments bor- 
dered with yellow behind, the border on the second interrupted 
in the middle; the third segment is marked with a faint spot 
of the same colour on each side, on its hinder edge; wings 
violaceous hyaline, with chestnut-brown nervures; tegule 
chestnut-brown. 
Ki Dulan, Sept. 2, 1874. 
Allied to D. agilis, Smith, from Celebes, but quite distinct. 
22. Dielis extranea. 
Exp. al. 11 lin. 
Male——Black ; clypeus incised, yellow below; labrum 
yellow, with a black spot in the angle formed by the clypeus ; 
thorax clothed with greyish pubescence ; prothorax and tegule 
yellow, a black stripe, narrowly edged below with yellow, 
running towards the tegule, and bounding the yellow colour 
on each side; scutellum and postscutellum and the sides of 
the metathorax behind yellow; the lateral sutures of the 
mesothorax may also be yellow, but this is much obscured 
by the villous covering; abdomen with the first three seg- 
ments broadly bordered with yellow behind, and most broadly 
at the sides; on the under surface the second and third seg- 
ments are bordered with yellow behind, this colour being 
interrupted in the middle; wings yellowish hyaline, with 
chestnut nervures; front legs yellow, front femora black 
above ; middle legs yellow above, the femora with a black 
basal stripe above and beneath; the tibie and tarsi and a 
small spot at the tip of the femora black beneath; hind legs 
black ; the femora and a short line on the outside of the tibize 
ellow. 
Wild Island (Admiralty Islands). ; 
Allied to D. aurulenta, Smith, a Philippine species. 
Bembicide. 
23. Monedula signata. 
Vespa signata, Linn, Syst. Nat. ed. x. vol. i, p. 574 (1758), 
Bahia, Sept. 1873. 
