150 REVISION OF THE THYNNIDiE OP AUSTRALIA, II., 



9. Head narrow, much longer than broad, produced posteriorly; 

 eyes situated at some distance from base of mandibles which are 

 long and pointed; the front is raised into a prominent ridge with 

 a flattened rugulose surface, and there is a strong depression on 

 each side reaching from eye to base of antenna. Thorax and 

 median segment finely punctured; abdomen shining, with a few 

 scattered punctures. Pronotum rectangular, about half as broad 

 again as long, as broad as head; median segment short, broadened 

 from base, and obliquely truncate posteriorly. First abdominal 

 segment with a raised semicircular mark on each side some dis- 

 tance before apical margin, second segment with three transverse 

 carinas (possibly others may be concealed by the first segment), 

 the apical margin hardly raised; third and fourth segments with 

 a semicircular raised mark on each side before apical margin; 

 pygidium very narrow, of about even width throughout. Black; 

 mandibles, antennas, pygidium and legs rufo-testaceous; sides 

 and apical margins of the abdominal segments testaceous. 

 Length 5-6 mm. 



Hob. — Sydney; Tempe, N. S. W. (Froggatt) — Mackay; Cairns 

 and Cape York, Q. (Turner; <JQ in cop.). 



Aeol. perelegans Sin., seems to me to be only a variety with the 

 yellow mai kings more strongly developed. 



78. T. (Aeolothynnus) decipiens Westw. 



Thynnus decipiens Westw., Arc.Ent.ii. 105,(note)p.l24,1844 j( J. 



ft. Clypeus not very much advanced, convex at base, depressed 

 and rather narrowly truncate at apex. Head and thorax punc- 

 tured-rugose; pronotum short, as broad as head, more finely 

 sculptured than head or mesonotum, the anterior margin straight 

 and elevated at sides. Median segment finely and closely punc- 

 tured, rounded, and narrowed from base, not truncate. Abdomen 

 elongate, strongly punctured, segments 2-5 with a strongly 

 depressed transverse line near base and a small triangular depres- 

 sion in middle of apical margin; apical segment rugose with a 

 median, longitudinal carina; sixth ventral segment with a strong 

 spine on each side at apical angles. Hypopygium ending in 



