158 REVISION OF THE THYNNIDJE OF AUSTRALIA, II., 



Q. Head broad anteriorly and rounded at sides, then sharply 

 narrowed to posterior margin; flat, with a slightly convex area 

 in centre; much broader than long; finely shagreened. Pronotum 

 much narrower than head, longer than broad, sides nearly 

 parallel. Mesonotum more than half as long as pronotum, a 

 little longer than broad; the whole thorax sparsely punctured. 

 Median segment rather slender, obliquely truncate posteriorly, 

 more closely punctured than thorax. Abdomen sparsely punc- 

 tured; first segment with a curved transverse carina, emarginate 

 in middle, before apex, apical margin depressed; second segment 

 with five transverse carina?, including the recurved apical margin, 

 carina before apex curved and obsolete in middle. Third and 

 fourth segments with a strongly curved raised mark on each side 

 before apical margin. Fifth segment above with a delicate 

 longitudinal carina; beneath coarsely punctured. P} T gidium 

 oblong-ovate oblique, with a longitudinal carina and the lateral 

 margins raised. Fusco-ferruginous; head fuscous, legs testaceous. 

 Length 9 mm. 



Hab. — S. Australia. In Oxford University Museum. 



The male attached to this female differs from typical T medius 

 only in the colour of the clypeus, which is black with a yellow 

 line on the anterior margin. Allied to T. maculatus Guer. . 



Var. breweri, n.var. 



(J. Differs from typical T. medius in colour only. Clypeus 

 black with a yellow line on apical margin, a short line on inner 

 margin of eye, anterior margin of the pronotum narrowly inter- 

 rupted, base of the tegulcc and the postscutellum 3 T ellow. The 

 markings on the abdomen beneath as in typical T. medius, the 

 band on segments 2-4 broadly interrupted on sides, leaving a 

 small spot on each side near middle and close to apical margin. 

 Length 13 mm. 



9. Similar to that of typical T. medius described above, but 

 darker in colour. 



Hah. — Albany, W.A.( Brewer). In Oxford University Museum. 



