214 Mr. E. Saunders' Sijnopsis of British 



1. ritginodis, Nyl. Adn. Mon. Form. Bor. Eur. p. 929, 2. 



3 dark brown, shining, surface with scattered, 

 short, semi-erect hairs ; mesothorax in front, meta- 

 thorax, and abdomen poHshed and shining ; wings dusky 

 at the base, the dusky colour extending as far as 

 the radial cell; head, across the eyes, wider than the 

 thorax, eyes very prominent, situated about midway 

 between the base of the head and the apex of the 

 mandibles, frontal area not sulcate, vertex somewhat 

 longitudinally rugose ; antennas with the scape curved 

 towards the base, and thickened towards the apex, 

 as long as the first six joints of the flagellum ; meso- 

 thorax in front of the converging lines very shining and 

 polished, behind them slightly uneven, with indications 

 of longitudinal rugosities ; metathorax with two very 

 blunt spines, both nodes of the petiole smooth and 

 shining ; abdomen about the same width as the thorax, 

 egg-shaped ; legs with fine short semi-adpressed hairs. 

 Length 6 mill. 



$ testaceous, covered with long pale hairs ; head, 

 with the exception of the mandibles, abdomen except at 

 the apex, and a curved line running from the insertion 

 of the wings, round the scutellum, generally darker ; 

 wings more or less testaceous towards the base, nerves 

 pale ; head and thorax deeply and longitudinally rugose, 

 the latter rather smoother on the disk ; head wider than 

 the thorax, frontal area smooth and shining, scape 

 of the antennae slightly and regularly curved at the 

 base ; mesothorax rounded in front, moderately convex 

 on the disk, as wide behind as in front ; metathorax with 

 two strong, slightly curved spines, which are longer than 

 they are wide at the base, sjpace between them trans- 

 versely rugose ; nodes of the petiole rugose ; abdomen 

 shortly oval, with a darker cloud towards the base ; 

 legs covered with short, somewhat adpressed hairs. 

 Length 6 — 7 mill. 



^ differs from the ? in the shape of the thorax, 

 which is wider in front than behind, and constricted 

 near the middle ; it is also generally much more 

 rugose, with the rugosities deep and longitudinal. The 

 metathorax is as high as the mesothorax, and the spines 

 liroject above its level. Length 5 — 6 mill. 



^ common species in most localities. 



