214 hymenoptera. 



34. Ammophila clavus. 



Sphex clavus, Fahr. Ent. Syst. ii. 205. 26 ; Syst. Piez. 206. 3. 

 Hab. New Holland. (Banksian Collection, Mus. Linn. Soc.) 



35. Ammophila suspiciosa. B.M. 



Female. Length 7-8 lines. — Black : the face densely covered 

 with silvery pile ; the head and thorax thinly clothed with long 

 silvery-white ])ubescence; the pro- and mesothorax strongly 

 ])unctured, the metathorax rugose ; the wings byahne, with a 

 faint cloud at their apical margins, the nervures ferruginous ; 

 the legs have a thin silvery pile. Abdomen with the petiole, the 

 base of the first segment, the apical margin of the third and the 

 following segments entirely black. 



The male only differs in being smaller and more slender in form. 



Hab. Australia (Swan River; Hunter River; North-west Coast). 



The only difference between this species and A. argentata 

 consists in the coloration of the abdomen; probably it is a 

 mere variety. 



36. Ammophila instabilis. B.M. 



Female. Length 10 lines. — Black : the scape, two basal joints 

 of the antennas, and the mandibles ferruginous ; the base and 

 tips of the latter black ; the face thinly covered with silvery pile. 

 Thorax : the prothorax, and mesothorax before the insertion of 

 the wings, transversely striated; the posterior portion of the 

 mesothorax is obhquely striated inwardly, the scutellum and post- 

 scutellum longitudinally striated, and the metathorax transversely 

 so ; the collar on each side, the tubercles, a spot beneath the 

 wings, the metathorax, scutellum, post-scutellum and legs, ferru- 

 ginous ; the wings flavo-hyaline, the nervures and tegulse pale 

 ferruginous. Abdomen : the petiole, basal segment of the abdo- 

 men and basal half of the following segment ferruginous ; the 

 rest of the abdomen blue-black, and a black spot at the base of 

 the second joint of the petiole. 



Hab. Australia (Swan River; Port Essington). 



The colouring of the metathorax is very inconstant in this 

 species ; in some examples the sides only of the metathorax are 

 ferruginous, in others it is entirely black, and the spot beneath 

 the wings, the scutellum and post-scutellum are likewise black : 

 varieties also occur between these extremes. 



37. Ammophila basalis. B.M. 

 Female. Length 7h-^h lines. — Black : the head smooth. 



