BRITISH ICHNEUMONIILE. 91 



17. Bassus BIZONARIUS. 



Bassus bizonarius, Grav. iii. 350, 23. 

 In Mr. Desvignes' collection. 



18. Bassus laetatorius. B. M. 



Bassus laetatorius, Panz. Krit. Revis. 74. 



Ichneumon laetatorius, Fab. Spec. 424, n. 26. Gmel. Syst. Nat. 



2682, n. 99. Till. 150, n. 46. Oliv. 173, n. 47. 

 Crypturus laetatorius, Lamarck, 141, n. 4. 

 Anomalon laetatorius, Trent, in Isid. 1826, iii. 298, Curt. Brit. 



Ent. after pi. 198. 



19. Bassus compressus, n.s. 



Foeni. Niger. Abdomine segmentis 3 et reliquis multo compressis. 

 Pedibus fulvis ; coxis fulvis interdum fusco-ferrugineis. 



Head : mouth pale ; a small central yellow spot below the 

 antennae. Antennae half the length of the body, filiform. Thorax 

 as broad as the head, very convex ; a yellow dot before the wings. 

 Wings smoky hyaline ; stigma and costa testaceous ; scales paler ; 

 discoidal cellule oblong, sessile. Legs pale fulvous ; coxae darker, 

 sometimes fusco-ferruginous. Abdomen: first segment equilateral- 

 opaque, narrower than the thorax ; from the apex of the second, 

 and the remainder, much compressed. Aculeus very short, recurved. 

 Length 2| — 3 lines. 



Subgenus 2. ORTHOCENTKUS. 



Orthocentrus, Grav. 



1. Orthocentrus anomalus. B. M. 

 Orthocentrus anomalus, Grav. iii. 360, 27. 



2. Orthocentrus incisus. B. M, 

 Orthocentrus incisus, Grav. iii. 361, 28. 



3. Orthocentrus larius. 

 Orthocentrus larius, Hal. Curt. Cat. col. 109. 

 In Mr. Curtis's collection. 



