150 Rev. T. A. Marshall's monograph of 



Afiatlddides. The abdomen, though tending to lose the 

 form of a carapace, still shows a similiarity to that of 

 CJielonus ; the 1st segment, thorax, and head, are like 

 those of Agathis ; the terebra and its valves are formed 

 as in Microgaster. There seems to be no reason why the 

 name Spharopyx of Haliday should be neglected in 

 favour of Wesmael's wrongly spelt Rhitigaster, which is 

 of later date. The subgenus Acampsis, Wesm., formed 

 for the reception of Chelonus alternipes, Nees, differs 

 from Sph(sropiix in that a portion of the 4th abdominal 

 segment is visible ; but the character is not of generic 

 value, and the species is not British. 



1. Splmropiix irrorator, Fab. (PI. V., fig. 3). 



Ichneumon irrorator, Fab., E. S., ii., 177; cf. DeGeer, 

 Mem. I., iv., 29, pi. xxxvi., ff. 12, 13. 



Chelonus irrorator, Nees, Mon., i., 276, 2 ; Ratz., 

 Ichn. d. Forst., iii., 25. 



Rhitiqaster irrorator, Wesm., Nouv. Mem. Ac. Brux., 

 1835, p. 248, <? 2 ; Thoms., Opusc. Ent., vi., 1874, 

 p. 555 ; St. Farg., Hym., pi. xliv., f . 4 ; S. v. Voll., 

 Schets., ii., tab. 5 ( 2 and $ abdomen). 



Black, with whitish pubescence ; segment 3 aureo-sericeous ; 

 legs hirsute, fore femora at the apex, and their tibiae on one side, 

 testaceous ; middle tibiae dull testaceous at the base ; hind tibiae 

 testaceous with black tips. Wings subhj^aline towards the base, 

 the apical half fuscous ; stigma ferruginous ; beneath it is a whitish 

 spot. Metathorax rugose, canaliculated. Abdomen showing 3 

 segments, rugose, clavate. Terebra very short. 3 ?• Length, 

 4 — 5 ; wings, 8 — 10 lines. 



Antennae about as long as the body, 50-jointed. Head narrower 

 than the thorax ; clypeus deex^ly impressed on each side at the base ; 

 face carinated. Mesothoracic sutures distinct, the 2 lateral much 

 deeper than the middle one. Before the smooth scutellum are two 

 deep impressions. Metathorax shining, rugose, canaliculated in the 

 middle. Abdomen longer than the head and thorax, gradually 

 widened to the apex ; segments 1 — 2 rugose, dull ; segment 1 

 bidenticulate at the base, bicarinated, the carinae continued upon 

 segment 2, but inore faintly ; segment 3 vei'y convex, less rugulose, 

 and covered above with adpressed hairs, forming a golden sericeous 

 spot. Belly concave, carinated in the middle, armed just behind 

 the terebra with 2 acute teeth pointing backwards. 



Var. Segment 2 blood-red with abbreviated black band ; Wesm., 

 I. c, 1838, p. 16G. 



