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. iii. 393. 1. t. 31. f. 5 ? . 



Lucas, Explo. Sc. Alger. iii. 267. 

 Calicurgus scurra, St. Farg. Hym. iii. 400. 3 ? 



Female. Length 8 lines. Black : the vertex, antennse, 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 

 tibiae, 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 antennae ferruginous, with 

 a black stripe across the vertex enclosing the stemmata; the 

 prothorax, mesothorax, scutellum, post-scutellum, and tegulae 

 ferruginous ; the metathorax and abdomen black ; legs black, 



i 2 



