140 REVISION OF THE THYNNID.E OP AUSTRALIA, II., 



strongly convex, broadly truncate at apex; median segment 

 rounded, with a smooth area on each side near base. Abdomen 

 shining with a few scattered punctures; segments 2-5 with an 

 impressed transverse line near base; second and third segments 

 more strongly depressed at the base than the others; the apical 

 margin of all the segments narrowly depressed, most broadly in 

 middle. Hypopygium ending in three acute spines, the central 

 spine stout at base and much the longest. Black; base of 

 mandibles, clypeus except a small black spot before apex, margins 

 of pronotum, tegulae, mesopleurae in front, a longitudinal spot in 

 middle of posterior half of mesonotum, a spot on each side at 

 anterior angles of scutellum, postscutellum, a curved spot on 

 sides of median segment and a small spot at apex, a spot on each 

 side of first abdominal segment, a narrow transverse band on 

 each side of the five following segments, broadly interrupted on 

 second, narrowly on the others, and a spot on each side of seg- 

 ments 2-5 beneath dull yellow; tibiae and tarsi ferruginous, the 

 tibige marked with pale yellow. Wings hyaline, nervures black, 

 stigma ferruginous. Length 13 mm. 



(J). Head sparsely punctured, longer than wide, much narrowed 

 posteriorly, strongly flattened, the antennae inserted far apart, 

 the front between them bilobed, a smooth and slightly convex 

 area in middle above base of antennae, eyes situated close to base 

 of mandibles, margins of the head rather broadly expanded 

 below them. Thorax sparsely punctured; pronotum longer than 

 broad, with a strongly raised blunt tubercle in middle, anterior 

 margin straight, with a few large setigerous punctures, the 

 angles subtuberculate. Median segment more closely and finely 

 punctured, obliquely truncate posteriorly. Abdominal segments 

 aciculated at base, very sparsely punctured at apex; first segment 

 truncate anteriorly, the apical margin slightly raised, with a 

 broad groove before it, giving the appearance of a transverse 

 carina before apex; second segment with five strong transverse 

 carinae, including the raised apical margin. Pygidium narrow, 

 lanceolate, the sides parallel, with a longitudinal carina and with 

 a tuft of golden hairs on each side before apex. Ventral seg- 



