NEW AUSTRALIAN SAW FLIES. 
219 
sculpturing is denser ; on the thorax the roughness is absent in the middle of 
mesonotal lobes and scutellum which are perfectly smooth and shining ; abdomen 
transversely rugulose. 
Head : clypeus entire ; malar space very short, about half the diameter 
of an ocellus in length ; antenna (fig. 4a) 10-segmented ; pedicel about as long 
as broad ; segment 3 greater in length than 4 + 5 ; flagellum set i form ; no 
segment broader than long ; median fovea well marked as a deep depression. 
Fig. 4. — Antenna of ( a ) Diphamorphos pallicornis sp. nov., ( b ) D. minor It oh we r. 
Fig. 5. — D. pallicornis sp. nov., saw. 
Legs with hind basitarsus equal in length to three following tarsal 
segments together. 
Abdomen . — Hypopygium with a triangular area, lightly chitinized, in the 
middle of the hind margin ; sawsheath viewed from above small and slightly 
emarginate apically with curved hairs ; saw fig. 5. 
New South Wales, Tooloom, 2$$, i-1926, H. Hacker (holotype in 
Queensland Museum, paratype in British Museum). 
This species is at once distinguished from the three previously described 
in the colour and form of its antennae which are yellow, only 10-segmented, 
setiform, with no segments broader than long (cf. fig. 4a and b). For a key 
to the previously described species see Benson 1934 (2) : 471. The saw and 
sawsheath are typical also for the other known species in this genus. 
