466 MK, K. E. TURNER ON [May 12, 



ferruoinous; the posterior half of the mesonotum, u median 

 lonoitudinal line on the anterior half, and the spines and ringues 

 of the tarsi black; the three apical abdominal segments shnung 

 steel-blue; a spot at the base of the second ]oint of the petiole 

 black. Wings hyaline, the base of the anterior pair pale liavo- 

 hyaline ; nervnres testaceous. , . , ^i +k^ 



The second and third cubital cells are equal m length on the 



radial nervure. 



Length 18 mm. r t -i -c^ 



Hah. KiUalpanima, S. Australia, 100 mijes east of Lake Eyre 



{H. J. Hillier). 



Type in British Museum. Described from two specimens. 



Near A. instabilis Sm., but is a smaller and more slender 

 insect; the second joint of the flagellum is longer m proportion, 

 and the dorsal surface of the median segment is not sharply 

 raised towards the median line as in typical instabilis. 



Ammophila instabilis Sm. 



Ammophila instabilis Sm. Cat. Hym. B. M. iv. p. 214. n. 36, 



1856, $. 



Ammophila impatiens Sm. Trans. Ent. Soc. London, p. 247. 



n. 1, 1868, d (as 2 )• 



These are without much doubt the sexes of one species. 

 Hab. Champion Bay, W. Australia. 



Ammophila ardens Sm. 



Ammophila ardens Sm. Trans. Ent. Soc. London, p. 247. n, 2, 

 1868. 



Hab. Swan River {Du Boiday), Mackay, Queensland [Turner). 



Ammophila suspiciosa Sm, 



Ammophila suspiciosa Sm. Cat. Hym. B. M. iv. p. 214. n. 35, 

 1856. 



This is the only Australian species known in which the petiole 

 is one-jointed. It is, as Smith points out, scarcely distinct from 

 the N.- African species A. argentea Brulle. 



Hab. Melbourne ; Lake Eyre district ; Perth ; Tasmania. 



Sphex (Isodontia) albohirtus, sp. n. 



2 . Mandibles broad and tridentate. Clypeus rather sparsely 

 punctured, clothed with very short, close pubescence which shows 

 as silver in some lights, with sparse, long, brown hairs ; slightly 

 convex at the base and subcarinate, very broadly and shallowly 

 emarginate at the apex, with a small and narrow emargination 

 in the middle of the apical margin, the angles of the emargination 

 produced into minute spines. Second joint of the flagellum as 

 long as the third and half of the fourth. Eyes slightly con- 

 vergent towards the clypeus, separated on the vertex by a space 

 equal to the length of the third and fourth joints of the flagellum 

 combined, and by nearly the same distance on the clypeus ; the 



