76 Mr. E. E. Turner's Notes on the Thijnnidm, 



base with a low transverse carina before the rugose area ; third and 

 fourth segments with an impressed transverse line near the base, the 

 extreme base smooth. Pygidium twice as long as broad, obliquely 

 dejjressed, longitudinally rugose and a little widened to the apex. 

 The posterior femora flattened above and curved at the apex. 



Opaque black, the head shining ; two large quadrate spots narrowly 

 separated from each other on the front round the base of the 

 antennae ochreous ; the flagellum and the pygidium at the apex 

 fuscous. 



Length 10 mm. 



In the British Museum. 



Elaphroptera intaminata, Sm. 



Thynnus intaminatus, Sm., Descr. n. sp. Hym., p. 173, 



n. 41, 1879, $. 

 Thynnus {Elaphroptcra) holomdas, Andre, Voy. Belgica. 



Zool. Hym., p. 61, pi. ii, fig. 8, $. 



Maphroptera crythrura, Spin. 



Thynnus erythrurus. Spin., Gay Hist. Fis. Chile Zool., vi, 



p. 295, 1851, $. 

 Elaphroptcra relida, Sauss., Reised. Nov. Zool, ii, 1, Hym., 



p. 126, 1867, ?. 



There is a pair of this species in the British Museum, 

 showing that Saussure was right in his suggestion that 

 they are the sexes of one species. 



Elaphroptera arcuata, n. sp. 



^ . Clypeus closely and rather coarsely punctured, strongly convex 

 at the base, with a prominent median carina, very strongly and 

 broadly emarginate at the apex. Antenna as long as the thorax and 

 median segment combined, as far from each other at the base as from 

 the eyes, the seven apical joints are arcuate. Head finely and 

 closely punctured, with a delicate carina from a little below the 

 anterior ocellus reaching almost to the base of the clypeus ; the 

 posterior ocelli half as far again from the eyes as from each other ; 

 the front and cheeks clothed with long, sparse, cinereous pubescence. 

 Mandibles sharply bent just before the middle, with a slight tubercle 

 at the bend, bidentate at the apex, the inner tooth very short. 

 Pronotum short, rounded at the sides, the anterior margin straight 

 and raised. Thorax and median segment closely and rather finely 



