68 Eev. T. A. Marshall's monograph of 



joint elongate. Second joint of the maxillary palpi dilated. Two 

 cubital areolets, the 1st separated from the praediscoidal. Radius 

 not much curved. Terebra exserted. 



1. Eustalocerus clavicornis, Wesni. (PI. V., fig. 3). 



Mici'octonus clavicornis, Wesm., Notiv. Mem. Ac. 

 Brux., 1835, p. 65 ; S. v. Voll., Schets. Bracon., 

 tab. iv. (wing and antenna by Haliday). 



Black ; antennae dull testaceous ; clypeus at the apex, mandibles, 

 palpi, and legs, testaceous; hind legs slightly infuscated. Wings 

 snbfusco-hyalinc, stigma black, nervnres stout, blackish. Terebra 

 as long as f of the abdomen. $ . Length, 1 lin. 



Antenna? about twice as long as the head, 10-jointed, the 1st 

 joint forming ] of the entire length, the 2d obliquely inserted, 

 making a geniculation with the 1st, very short and stout ; 3d more 

 slender and twice as long ; 4 — 9 shorter, and successively diminishing 

 in length ; 10th almost as long as the three preceding taken 

 together, and appearing, when highly magnified, as if superficially 

 divided into 4 or 5 rings. Head as broad as the thorax ; vertex 

 somewhat short ; face granulated, obscure. Metathorax short, 

 rugose, abruptly truncated behind. First abdominal segment 

 much widened from the middle to the apex ; tubercles prominent ; 

 immediately above them are two deep impressions, behind which 

 the segment is longitudinally rugulose ; the lines of rugosity are 

 few, and do not quite reach the apex. Valves of the terebra black, 

 very slightly widened towards the extremity. 



This description is Wesmael's, who discovered the $ 

 in an osier-ground in Belgium, May 27th. A British 

 specimen was known to Haliday, who created a new 

 genus for its reception, but left no written record of the 

 species, and this has not been met with since. 



iv. Streblocera, Westw. 



Westw., Phil. Mag., 1833, p. 342; Int., ii., 61 j 

 Tijdschr. v. Ent., 1881—82, p. 44 ; Nees, Mon., ii., 411. 



Antenna? seated upon two frontal tubercles, the 1st and 3d joints, 

 or the 1st only, elongate ; with 1 — 2 geniculations in the ? , 2 or 

 none in the $ . Fore wings with 2 cubital areolets, the 1st not 

 separated from tbc prffidiscoida! ; radial areolet remote from the 

 tip of the wing; radius curved. Mesothoracic sutures distinct. 

 Abdomen with a short petiole. Terebra exserted or subexserted. 



