276 BRITISH ICHNEUMONS. [Thymaris. 



as long as body, unusally slender with the flagellum filiform and scape 

 compressed-globose. Thorax with the epomiae rising nearly to the meso- 

 notum ; notauli somewhat elongate but not deeply impressed ; meso- 

 sternum not transverse, flat, with sternauli long and not deep; metathorax 

 mutic and not rugose, with complete areac ; areola hexagonal and emit- 

 ting costulae before centre ; spiracles circular. Abdomen apically sub- 

 compressed ; basal segment elongate, discally subconvex, nearly thrice 

 longer than apically broad, aciculate throughout with only the petiolate 

 base smooth and spiracles slightly behind the centre ; second segment 

 quadrate and, at least in 9 > aciculate ; third finely alutaceous beyond the 

 centre, remainder glabrous ; terebra centrally incrassate and distinctly 

 exserted. Legs very slender with the hind coxae oblong ; hind tibiae 

 slightly incrassate before the base ; front femora not spinose, the basal 

 joint of their tarsi a little arcuate. Wings with no indication of anareolet; 

 radius A'ery slightly curved and emitted from the centre of the normally 

 broad stigma ; basal nervure hardly curved or oblique, and slightly diver- 

 gent from the cubital ; parallel nervure emitted far below centre of the 

 brachial cell ; nervellus antefurcal and intercepted far below the centre. 



This genus must be retained in juxtaposition to Ocdrma/opsis, with 

 which it so closely agrees in its more salient features, although the body 

 is more slender, the abdomen smoother and the head less cubical. It was 

 originally placed by Forster in the Ophioninae and Bridgman considered 

 it a division of Cymodusn in that sub-family ; Thomson, however, dis- 

 covered the obvious relationship of the above-named genus with it, and 

 includes them, under the group-name Thymaridcs, in the Tryphonid Meso- 

 /ep/ma, 1 think correctly; but Ashmead in 1900 widely separates these 

 two genera by leaving the present in its original position and placing 

 Ocdematopsis in the Piuiplinae. Both sexes bear a curious superficial re- 

 semblance to small Microcrypius or the more slender Hemiteles, and the 

 aciculate abdomen is similar to that of Panargyrops. 



The only other palearctic species, T. collaiis, Thoms., is not unlikely to 

 occur with us. 



7\ibh of Species. 



(4). I. Second segment distinct!}' aciculate 



throughout. 

 (3). 2. Coxae pale ; flagellum of 9 f^'- 



coloured .. i. pulchricornis, ^r/j-c/^. 



(2). 3. Coxae mainly dark ; flagellum of 9 



unicolourous . . " . . . 2. fenestralis, Mori. 



(i). 4. Second segment not aciculate ; 9 



unknown 3. v \?,ci AT A, Bri'dg. 



