Acaaiitus.] BRITISH ICHNEUMONS. 261 



ternally nigrescent. Wings flavcscent, with the stigma infuscate or ferru- 

 gineous ; radix pale and tegulae black. Length, lo — 12 mm. 



Gravenhorst mentions a variety in which botli sexes liave at most the 

 incisures of the second and third segments red, and the third to seventh 

 or the whole of the seven basal segments margined with glaucous-white. 



This species is very like A. arator in conformation, but the basal seg- 

 ment is shorter, the terebra longer, the thorax less coarsely sculptured 

 and the abdomen rufescent or at least white-banded. 



Panzer took it on umbelliferous flowers and Tosquinet savs it occurs in 

 July in Belgium. It was introduced as British bv Rev. T. A. Marshall in 

 his 1870 Catalogus but notliing whatever is known of its occurrence here. 



COLLYRIA, Schwdte. 

 Schiod. Guer. Mag. Zool. 1839, Ins. p. 10. 



Head cubical, with the eyes pilose and somewhat large ; cheeks buc- 

 cate, not elongate, with their costa sharply in flexed ; clypeus hardly dis- 

 creted, apically truncate and centrally produced. Antennae shorter than 

 head and thorax ; scape a little excised, flagellum basally subattenuate. 

 Thorax elongate ; pronotal epomiae conspicuous above ; notauli apically 

 distinct ; mesosternum elongate, with no lateral sulci ; metathorax long 

 with distinct longitudinal, but no transverse, costae ; spiracles small and 

 obliquely linear. Abdomen elongate and apically subcompressed ; basal 

 segment parallel-sided, with central spiracles; ventral valvulae not vonieri- 

 form, but covering the base of the short and straight terebra. Anterior 

 legs slender; the hind pair strong and stout, their tibiae straight and 

 longer than the incrassate femora, calcaria short, tarsi elongate with the 

 claws and pulvilli stout. Wings with stigma narrow and no areolet ; apical 

 abscissa of radial nervure nearly twice longer than the ba.sal ; lower angle 

 of discoidal cell subacute ; fenestrae discreted and not small. Lower 

 wings with the first recurrent very .strongly postfurcal, intercepted far 

 above its centre ; second recurrent centrally pellucid. 



This genus figures among the Ophioninac in all the British catalogues ; 

 but its stout and elongate hind legs, very indistinctly subpetiolate abdo- 

 men, cubical head, and the confomiation of the mouth parts and antenna 

 certainly ally it far more closely with Acaiiii/iis, as was indicated bv Thom- 

 son in 1877 ; and it appears to bear only a distant analogv with Prislonurus 

 vitlnerator, its cogeneric species in the Gravenhorstian svstem, which is a 

 true r)phionid and closelv related to Cnmas/ns. 



Tabic of Specks. 



(2). I. Eyes densely pilose; vertex strongly 



and cnnfiuently punctate i. C.-M.CITR.MOR, Grav. 



(i). 2. Eyes sparsely pilose ; vertex evenly, 



not conflueiitiy punctate . . 2. I'LNCl iCKl'.s, J ho/us. 



