274 BRITISH ICHNEUMONS. [Oedematopsis. 



the abdomen, stout and apical ly subattenuate. Legs entirely fulvous with 

 the anterior coxae and all the trochanters white, the hind tibiae and their 

 tarsal joints apically slightly infuscate. Wings hyaline ; radix and tegulae 

 white ; stigma luteous ; nervellus wanting. $ only. Length, 5 mm. 



Much as I dislike describing a new species from a single example, the 

 present insect is so distinct, bearing only a somewhat remote superficial 

 resemblance to Polysphincta Bnhcmanz, that it is well, I think, to put it on 

 record. 



I have seen but one female, which was captured by Dr. Capron, pre- 

 sumably in the neighbourhood of Shere in Surrey, about 1880. The type 

 is in my collection. 



DIADEGMA, m. 



? Diadegina, Forst. Verb. pr. Rheinl. 18G8, p. 153. 



Head distinctly transverse, with the temples not broad ; eyes nude and 

 very prominent ; occiput bordered and not emarginate ; face closely sha- 

 greened, dull and longitudinally subimpressed on either side the slightly 

 convex epistoma ; clypeus broader than long, distinctly discreted basally, 

 a little rounded and depressed apically, strongly convex with a central 

 transverse furrow on either side which is discally intercepted by a small 

 tubercle. Flagellar joints elongate and cylindrical. Notauli fine and 

 deeply impressed, sternauli entire and very strong, specular furrow reach- 

 ing centre ; metathorax convex and dull with complete areae ; basal area 

 triangular and as long as the subpentagonal areola which emits the costulae 

 slightly beyond its centre and is apically entire ; petiolar area flat, dis- 

 creted, reaching centre, with strong and obtuse apophyses ; spiracles 

 circular. Scutellum flavous and subconvex. Abdomen fusiform, com- 

 pressed only at the apex ; first segment basally narrow, explanate through- 

 out, shagreened with a small fovea before the glabrous apex, laterally 

 bordered with the spiracles distinctly behind the centre ; segments finely 

 pilose and not tuberculate ; terebra distinctly exserted and as long as the 

 basal segment. Legs elongate and slender, with the claws simple ; front 

 femora not spinose, their calcaria and basal tarsal joint strongly arcuate ; 

 hind tibiae subincrassate before the base, their tarsi white-banded. Wings 

 ample ; areolet large, transverse-pentgonal, with the outer nervure pel- 

 lucid ; nervellus normally curved, stigma not broad ; upper half of second 

 recurrent nervure, and the internal cubital broadly before its apex pellucid ; 

 median of hind wing distinctly curved before the nervellus, which is 

 strongly antefurcal and intercepted far below the centre. 



The above characters are drawn from an anomalous female in my col- 

 lection, which has much the facies of a Hcmitdcs, but the peculiarly broad 

 areolet which is externally complete, its resemblance to Thymaris, and the 



