124 REVISION OF THE THYNNIDiE OF AUSTRALIA, II., 



near apical angles, and a transverse band on second segment 

 yellow; a spot on each side of vertex ferruginous. Wings hyaline, 

 radial cell subfuscous, nervures fuscous. Length 11 mm. 



Q. Head broader anteriorly than long, very strongly narrowed 

 posteriorly, shining, very minutely punctured, a short longitudinal 

 sulcus between antennae. Pronotnm subquadrate, very delicately 

 and closely punctured, a row of large setigerous punctures along 

 anterior margin. Median segment more sparsely punctured, 

 obliquely truncate posteriorly. First abdominal segment with a 

 raised curved mark on each side before the broadly depressed 

 apical margin; second segment with four transverse carinse, 

 including the raised apical margin; the three following segments 

 sparsely punctured, with the apical margin narrowly depressed. 

 Pygidium deflexed, narrowly ovate, with a tuft of golden hairs 

 on each side springing from beneath epipygium. Black; head 

 ferruginous; legs, second abdominal segment and pygidium fusco- 

 ferruginous. Length 7 mm. 



Hab. — Mackay, Q. (Turner; <^Q in cop.). 



The colour in the male is most variable, the yellow markings 

 in some specimens being almost entirely absent, and in others 

 more extensive than in the type. 



44. T. (Aeolothynnus) polybioides, n.sp. 



£. Clypeus rather strongly convex, produced, and broadly 

 truncate at the apex. Head and thorax finely and closely punc- 

 tured; the anterior margin of the pronotum straight and rather 

 strongly raised; the scutellum sparsely punctured. Median 

 segment rounded, very finely and shallowly punctured, smooth at 

 the extreme base. Abdomen slightly fusiform, the segments not 

 much constricted, segments 2-4 with a lightly impressed trans- 

 verse line near the base, the apical margin narrowly depressed. 

 Hypopygium truncate at the apex, with an apical spine. Black; 

 the mandibles, clypeus, a minute spot at the base of each antenna, 

 the margins of the pronotum broadly, narrowly interrupted in 

 the middle on the anterior margin, a large spot on the meso- 

 pleurse below the anterior wings and a smaller one above the 



