556 Mr. R. E. Turner on Fossorial Hymenoptera. 



a distance not quite equal to the length of the third abscissa 

 of the radius. Spines of the fore tarsi long and slender. 



Length 8-10 mm. 



Hah. Eaglehawk Neck ; February, Mt. Wellington, 

 2200 ft. ; January. 



This species is near pacificus, Turn., but may be distin- 

 guished by the stouter antennse, the different proportions of 

 the joints of the flagellum, the longer second abscissa of the 

 radius, whicli is only equal to the first and third in paci/icus, 

 and by the shorter oblique depression of the clypeus. It is 

 a smaller species than pugnator^ Turn. 



Tachysphex pugnator^ Turn. 

 Tachysphex ^mgnator, Turn. Proc. Zool. Soc. London, p. 491 (1908). $ . 



Hah. Eaglehawk Neck ; February. 



Originally described from Adelaide. Tasmanian specimens 

 have the second and third abscissae of the radius longer than 

 in the type, but I do not consider this difference a specific 

 one. Tlie apical segment of the abdomen is strongly com- 

 pressed laterally, the pygidial area being long and very 

 narrow. The second and third joints of the flagellum are 

 about equal in length, but are a little more slender in 

 Tasmanian specimens than in the type. 



Tachysphex I'ugidorsatus, sp. n. 



? . Black ; spines of the tarsi whitish; an apical band of 

 white pubescence on the sides of dorsal segments 1-3. Wings 

 hyaline, iridescent, nervures black. 



Clypeus minutely punctured, narrowly transversely de- 

 pressed at the apex. Head opaque, finely and closely punc- 

 tured, second joint of the flagellum nearly as long as the 

 third, eyes separated on the vertex by a distance not quite 

 equal to twice the length of the second joint of the flagellum, 

 a deep depression on the vertex behind the posterior ocelli, 

 a sulcus from the posterior ocelli almost reaching the occiput, 

 no distinct frontal sulcus. Pronotum gradually sloped, not 

 vertical, sunk below the niesonotum ; thorax tiuely and very 

 sparsely punctured, the scutellum shining. Median segment 

 rugose-reticulate, the sides finely striated. Abdomen shining, 

 the apical segment not much compressed at the sides, elongate- 

 triangular, Second abscissa of tlie radius as long as the first 

 and third combined, first longer than the third. Recurrent 

 nervures separated on the cubitus by a distance about equal 

 to the first abscissa of the radius. Comb of the fore tarsi 

 long and slender. 



