HYMENOPTERA. 171 
deep fossulets on each side of the face; the fossulets, as well as 
the clypeus, adorned with bright silvery pile. The thorax and 
abdomen are covered with a short changeable pubescence, having 
in some lights shades of purple and violet, in others appearing 
black ; the posterior margin of the prothorax arcuate; the sides 
of the metathorax laterally, and the truncation, rugose; the 
lateral posterior angles have a spot of white pubescence; wings 
dark fuscous, with a transverse subhyaline stripe near their apex. 
Abdomen : a lateral ovate spot of silvery-white pubescence near 
the apical margins of all the segments; there is also a spot on 
the segments laterally, beneath. 
Hab. North-west Coast of Australia. 
Genus 5. SALIUS. 
Salius, Fabr. Syst. Piez. p. 124 (1804). 
1. SALIUS BICOLOR. B.M. 
Salius bicolor, Fabr. Syst. Piez. p. 124.1¢. 
St. Farg. Hym. iui. 393. 1. t. 31. £.59. 
Lucas, Explo. Se. Algér. iii. 267. 
Calicurgus scurra, St. Farg. Hym. iii. 400. 3? 
Female. Length 8 lines.—Black: the vertex, antenne, and 
the face on each side above the clypeus, broadly yellow ; the pro- 
thorax and a spot in the centre of the mesothorax yellow ; the 
tibiz, tarsi, and tips of the femora reddish-yellow ; wings yellow, 
their tips fuscous; the second segment of the abdomen has an 
ovate yellow spot on each side, about the middle; the third and 
fourth segments have on each side, at their base, an oblong 
macula. 
Hab. Algeria; Albania. 
The head and prothorax of the ordinary form of Pompilus : 
the mandibles bidentate. 
The female described has been received on several occasions 
together with the Salius bicolor, and will in all probability prove 
to be the female of that insect. 
2. SALIUS DISSIMILIS. 
Male. Length 8 lines.—Head and antenne ferruginous, with 
a black stripe across the vertex enclosing the stemmata; the 
prothorax, mesothorax, scutellum, post-scutellum, and tegulee 
ferruginous ; the metathorax and abdomen black ; legs black, 
12 
