Revision of Macrothynnus 
269 
Figures 3-6 Macrothynnus spp., male genitalia, lateral and dorsal views: 3, M. simillimus (Smith); 4, M. insignis 
(Smith); 5, M. mustus sp.nov.; 6, M. watherooensis sp.nov. P: paramere. Scale: 1 mm. 
and closely punctate; fore coxae almost flat; 
metasoma conical, polished; tergites finely and 
closely punctate; T1 vertically truncate anteriorly, 
not tuberculate above anterior truncation; stemites 
closely punctate; SI broadly medially raised, 
obliquely truncate posteriorly; hypopygium 
(stemite 8) transversely carinate dorsally, broadly 
rounded apical ly with apical spine, basal angles 
produced into small rounded lobes; genitalia as in 
Figure 3, parameres strongly curved and 
narrowed. 
Female 
Unknown. 
Distribution 
Eastern New South Wales. 
Remarks 
Turner (1908) synonymised M. molitor with M. 
simillimus without explanation. This is surprising 
since the holotypes are of different sexes, and were 
collected at an unknown locality in South Australia, 
and Sydney respectively. For these reasons, the 
absence of sufficient specimens, and a lack of 
evidence to support this synonymy, M. molitor 
cannot be considered to be a synonym of M. 
simillimus. 
The holotypes of both species do not bear locality 
data labels, despite the locations given in Smith's 
original descriptions. Further, the putative 
holotype of M. molitor is only presumed so, and is 
labelled "believed to be Type of T. molitor Sm. 
RET". Smith's description is not sufficient to 
recognise this species or specimen. 
Macrothynnus insignis (Smith) 
Figures 4, 7 
Thynnus insignis Smith, 1859:15. 
Thynnus ( Macrothynnus) insignis Smith: Turner, 
1908:195. 
Macrothynnus insignis (Smith): Turner, 1910: 45; 
Given, 1954: 47; Salter, 1954: 302. 
Material Examined 
Holotype 
6, Swan R. Western Australia, Australia (BMNH 
15.146). 
