Catalogue of British IchneumonicJfe. 865 



one-third longer than it; sides of post-petiole almost parallel, apex 

 rounded, ixiargins keeled, and an oblong pit in the centre, shining, 

 with somewhat coarse irregular aciculations ; remainder of the 

 abdomen smooth and shining; base of 2nd segment between the 

 distinct thyridii coarsely aciculate, extending one-third the length 

 of the segment (this is nearly twice as long as wide), the 3rd sub- 

 quadrate, the remaining ones transverse. Legs slender. Wings 

 without an areolet ; transverse anal nervure divided in the middle. 

 Mouth, apex of clypeus, elevation of face, greater part of base 

 of antennae beneath, squamulse, tubercles, base of wings, scutellum, 

 yellow. Legs, coxae, and trochanters yellow ; base of posterior 

 joint of hind trochanters fuscous ; rest of legs yellowish red ; apex 

 of hind tibiie and apical joints of hind and middle tarsi slightly 

 fuscous. Stigma dilute fuscous. Abdomen : apex of 2nd segment, 

 the 3rd, 4th, 5th, and Gth chestnut-red, with a large dorsal black 

 mark at the base, occupying almost all the back of the segment. 

 Male. Length, 5 mm. 



Taken by Mr. Bignell in the neighbourhood of Ply- 

 mouth in 1884. 



Bassus abdominator, n. s. 



Niger, macula parva media faciei, et scutello apice, flavo ; pedibus 

 rufis, tibiis posticis maxima ex parte tarsisque posticis nigris, meta- 

 thorace, segmentis primo et secundo abdominis rufo maeulato. 



Head opaque, finely punctated ; apex of clypeus rotundate, 

 slightly immarginate in the middle, distinctly separated from the 

 face. Antennae about two-thirds the length of the body. Meta- 

 fchorax without a trace of supero-medial area ; the lateral angles 

 of the metathorax terminate behind more prominently than usual, 

 giving the upper part a square appearance, but transverse. Abdo- 

 men longer than the head and thorax. First segment of abdomen 

 about one and a half times longer than wide, slightly tapering 

 from behind the projecting spiracles to the apex of the segment ; 

 remaining segments transverse, compressed towards the apex ; 

 1st segment opaque, scabrous, with indications of longitudinal 

 aciculations ; 2nd segment transverse, scabrous, at the base with a 

 deep transverse depression on each side, and between them a 

 shallower longitudinal groove, distinctly aciculated ; remaining 

 segments subopaqiie. Wings without an areolet; transverse anal 

 nervure divided below the middle. 



Black ; mouth and greater part of mandibles yellow ; apex of 

 scutellum with a transverse yellow line ; base of wings, tubercles, 

 and squamulse yellow. Metathorax with a large dull red spot or. 



TRANS. KNT. SOC. LOND. 18HG. PART III. (oCT.) 2 C 



