244 REVISION OF THE TflYNNID^ OF AUSTRALIA, I., 



E. SIMILLIMUS Sm. 



Rhayiyaster simillimus Sm., Trans. Ent. 8oc. Loud. (3) ii. 5, 

 p.390, 1865((J). 



Thynnus ivolfraniii D.T., Cat. Hym. viii. H9((J). 



Probably only a local form of E. /uHmorrhoidalis, from which it 

 differs mainly by the red colour of the mesopleiuw, the lesser 

 development of the frontal carinas, and the presence of a fine 

 median longitudinal carina on the epipygium. 



9. Unknown. 



Ilah.—^.W. Australia. 



E. DIMIDIATQS 8m. 



I Rhayiyaster dlmidiatus Sm., Cat. Hym.vii.p.62,n.lO, 1859((J9). 



Tkynnus ottetihallii D.T., Cat. Hym. viii. 112, 1897((J9). 



(J. Clypeus coarsely longitudinally rugose. Front and vertex 

 rugulose, an undulating transverse carina between the eyes, a 

 wide V-shaped carina between the antennae joining at the apex a 

 short longitudinal carina which extends on to the basal portion 

 of the clypeus. Prothorax transversely rugulose, the anterior 

 margin raised and produced at the lateral angles. Mesothorax 

 and scutellum coarsely rugose; median segment truncated poste- 

 riorly, finely rugulose at the base, finely punctured on the surface 

 of the truncation. Epipygium rugulose at the base, longitudinally 

 striated on the apical portion, truncate at the apex with a slight 

 median emargination, the margin recurved. 



9. Third abdominal segment delicately transversely striated 

 near the base. Pygidium vertically truncate posteriorly, the 

 surface of the truncation longitudinally striated, the extreme 

 apex smooth and narrowly rounded. Otherwi.se as in Smith's 

 description. 



Zra6. — Sydney, N. S.W. 



E. TESTACKIPES, n Sp. 



^. Head punctured, very sparsely and finely on the occiput; a 

 strong undulating transverse carina below the anterior ocellus, 

 not quite reaching the eyes, a rounded carina between the 



