140 Mr, R. E. Turner 07i some new or 



Very near cerceroides, Sm., but the head and clypeus are 

 inucli longer and narrower than in the typical form of that 

 insect and the thorax is much more finely punctured. It is 

 a much smaller and less robust species, and the colour of the 

 legs is different. 



In my key to the females of Thynnus I liave placed those 

 of the subgenus y^olothynnus among those with the tarsal 

 ungues simple; but in all except those of the westiooodii 

 group there is really a minute tooth near the middle. In all 

 tlie ungues are very feeble and small. 



Thynnus gravidas, Westw. 



In my revision of the Thynnidre I suggested that this 

 might be the female of Oncorrhinus xanthospilus, but on a 

 further examination of the type at Oxford I feel little doubt 

 that Westwood was correct in connecting it with his 7 .klugii, 

 and that the female wliich I described as that of T. klugii, 

 Westw., should belong to the closely allied species T. poul- 

 toni, Turn., which was confu.«ed both in the Oxford and 

 British Museums with T. klugii. The two females agree in 

 the structure of the hind femora, the strongly developed spur 

 of the anterior tibise, the shape of the pygidium, the sculpture 

 of the first two dorsal segments of the abdomen, and the bi- 

 tuberculate prominence between the antennae. The pronotum 

 in T. poultoni is, however, not concave on the sides, and I 

 have been unable to examine the mouth-parts; the fifth 

 ventral segment in T. gravidas is longitudinally striated at 

 the apex, whereas in T. poultoni it is transversely striated. 

 The difference in colour is striking, considering the close 

 resemblance between the males. 



Thynnus bidensy Sauss. 



In my recent revision of the Thynnidse (Proc. Linn. Soc. 

 N.S.W. xxxiii. p. 249, 1908) I gave this as a synonym of 

 2\ gracilis, Westw., but the hypopygium is quite different, 

 being shorter, without basal spines and with the sides bent 

 upwards. Thynnus viduus, Sauss., is the female of this 

 species, but is very near T. gracilis, ? ; the head being 

 rather longer in T. gracilis. 



Thynnus pseudomelleus, sp. n. 



S . Clypeus truncate at the apex, the angles very .slightly 

 proinineiit, shallowly and rather closely punctured, very 

 narrowly truncate at the base and connected by a broad 



