148 Kev. T. A. Marshall's monograph of 



$ sometimes obscurely rufescent at the base, of the ? rufo- 

 fen-uginous with the apex black. Head broad, rugulose, buccate, 

 front with a deep, shining, fovea margined on each side ; clypeus 

 discrete, rounded, edentate. Mesothorax, pleurae, and metathorax 

 reticulato-rugose, the last bidenticulate. $ ? . Length, 2^^ ; 

 wings, 3^ lin. 



Among the four species with black trochanters this 

 may be known at once by the mesothorax not being 

 punctate, but rugose, and by the smooth, deep, margined, 

 frontal fovea. Antennae $ rather longer than the body, 

 36-jointed (in one specimen) ; those of the ? shorter, 

 thickened beyond the middle, 37 — 38-jointed. In the 

 only British example, which is a <? , joints 1 — 3 are tes- 

 taceous, with a fuscous line above ; and the palpi are not 

 black, but dingy testaceous. The abdomen is entirely 

 black, as in the <? described by Wesmael. 



The specimen is in Bridgman's collection, and was 

 taken at Buckenham, Norfolk, August 17th. It is 

 accompanied by a broken example, which was named by 

 Eeinhard, in Fitch's collection. 



10. Ascogaster quadridentatus, Wesm. 



Ascoqaster quadridentatus, Wesm., Nouv. Mem. Ac. 



Brux., 1835, p. 237 ; Reinh., Berl. ent. Zeit., 



1867, p. 367; Thoms., Opusc. Ent., vi., 1874, 



p. 588, 3^ 2 . 

 Chelonus simiUs, Eatz., Ichn. d. Forst., i., 42, pi. vii., 



f. 16 (not of Nees). 

 C. impressus, Schaff., F. G., cliii., 9. 

 C. quadridens, Schiiff., F. G., cliv., 10. 



Black, antennte at the base, fore tibiae, fore femora at the apex, 

 posterior tibite often at the base narrowly, rufo-testaceous. Head 

 finely rugulose, clj'peus hardly discrete, angulated at the apex, not 

 tridentate. Mesothoracic sutures obsolete. Mesothorax, meso- 

 pleurse, and metathorax reticulato-rugose, the last 2 — 4-deutate, 

 3 2 . Length, If — 2 ; wings, 3^ — 4 lin. 



Var. (J 5 . Antennae entirely black ; of the J 33-joiuted. 



Antennse ^ 29 — 30-jointed, 1st joint black tipped with testaceous, 

 the following joints also testaceous, especially on the under side, 

 becoming darker to the middle, the rest black. Face covered with 

 short ashy pubescence, having a fine medial carina reaching from 

 near the clypeus to the ocelli. Clypeus minutely angulated in the 

 middle, the angle somewhat i-aised. Mandibles black, sometimes 



