226 MEMOIRS OF THE QUEENSLAND MUSEUM. 
and scutellum of mesonotum, the hind tibiae and tarsi, the abdomen from the 
middle of the 4th segment with the exception of the sawsheath. Wings 
hyaline ; costa yellow ; stigma and rest of venation brown. 
Length (excluding genitalia) 4 mm. ; forewing 4-5 mm. ; antenna 1*8 mm. 
Puncturation. — Surface mostly shining and unpunctured, but on the orbits, 
and side lobes of mesonotum is in places developed a very fine regular coriaceous 
sculpturing, and the dorsum of the abdomen is transversely rugulose. 
Pubescence. — The whole insect, except the dorsum of the abdomen from 
segment 2, is covered with a fine regular pubescence. 
Head. — Antenna with 14 segments, (fig. 9b). 
Legs with long preapical tibial spurs on middle and hind legs ; apical 
tibial spurs exceptionally long ; on the middle legs the longer spur is equal to 
about three-quarters the length of the basitarsus ; on the hind legs the longer 
sp:ir is equal to the length of the 3 following tarsal segments together (fig. 9c). 
Abdomen. — $ Sawsheath viewed from above (fig. 9d) ; saw (fig. 9e). 
New South Wales, Tooloom, 1$, 1926, H. Hacker (Queensland Museum). 
PERGA THOMSONI sp. nov. 
$ Colour black ; yellow are mouthparts, the face in front of a transverse 
line on a level with front ocelli and genae at the sides up to a level with 
the top of the eyes ; on all the legs the tibiae and tarsi, and on the front legs 
the apical half of the femur also. Wings hyaline at the base, slightly infuscate 
at apex from below the stigma ; stigma, and venation black. 
Length 18 mm. ; fore wing 12-5 mm. ; antenna T2 mm. 
Head . — Face shining unpunctured with sparse pubescence ; a transverse 
band from eye to eye, including the ocelli, thickly and finely punctured and 
covered with dense pubescence ; head behind the eyes convex and with coarse 
scattered punctures and sparse pubescence ; mouthparts normal ; clypeus slightly 
emarginate in front : malar space very short, about as long as 3rd segment of 
antenna ; antenna paradoxically short (shorter than distance between antennae), 
6-segmented ; pedicellum very short, more than twice as broad as long ; 
flagellar segments all forming a club ; segment 3 = 4 + o ; segment 6 longer 
than rest of flagellum ; median fovea as a deep groove stretching back to front 
ocellus, and with a large flat cushion each side and behind the antennae ; eyes 
large elongated, concave in the inner side ; ocelli far apart so that Pol : Ool 
in the proportion of 18 : 13 ; post-ocellar area bordered at the sides with coarse 
punctures, and broader than long (in the proportion of about 6 to 5). 
