BRITISH ICHNEUMONS. 



HOPLISMENUS, Gravenhorst. 

 Gr. I. E. ii. 409 ( 1S29) ; Wesm. Xouv. Mom. Ac. Briix , 1844, p. 13. 



Head not tumidulous, somewhat narrowed behind the eyes and towards 

 the mouth ; clypeus large, apex truncate ; labrum usually very shortly 

 exserted. Antennae slender setaceous ; of ? often stouter towards apex. 

 Thorax gibbulous ; mesonotum somewhat convex with distinct notauli ; 

 metathorax with basal sulcus profound, and usually two acute apophyses ; 

 spiracles linear or oval. Scutellum strongly elevated, abruptly declived. 

 Abdomen sub-fusiform ; terebra distinctly exserted ; hypopygium not 

 covering base of terebra. Legs somewhat slender. Wings normal ; 

 areolet pentagonal. 



The bidentate metathorax, exserted terebra, &:c., lend members of this 

 genus decided Cryptid facies, and in colour H. pemiciosiis closely re- 

 sembles Mesostenus obnoxius ; but the males bear only the faintest traces, 

 and the females none at all, of sternauli. To Platylabus it also bears 

 a superficial resemblance, but may be distinguished, besides the major 

 points before indicated, by the straight, slender, hind tibiae and by the 

 large and pentagonal areolet. 



This genus has been placed by all former authors among the Oxypigini, 

 but the conformation of the metathorax and scutellum clearly ally it with 

 the Trogoidae of Forster ; among the Oxypigini it is certainly aberrant. 



Table of Species. 



(4). I. Gastrocaeli small : thorax with strong spines ; 



anus immaculate. 



(3). 2. Anus infuscate ; length 9 mm. or more i. PERNICIOSUS, Grav. 



(2). 3. Anus rufous ; length 8 mm. or less 2. albifrons, (?rrt7^ 



(i). 4. Gastrocaeli broad ; thorax with small spines ; 



anus white marked 3. uniguttatus, Grav. 



I. perniciosus, Grav. 



Iclineninoii arinatorius, Panz. F. G., ? (?). Hoplismeuits perniciosus, Gr. I. E. ii. 413 ; 

 .Ste. 111. M. vii. 275 ; Wesm. Nouv. Mem. Ac. Brux. 1844, p. 108; Bui. Ac. Brux. 1848, 

 p. 186 ; Ilolmgr. ichn. Siiec. i. 208 ; Tlioms. O. E. xix. 2082 ; Berth. Ann. Soc. Kr. 

 1894, p. 513, <? $. /. hellicosns, Stephani, Nat. Sicil. 1886, ?. Var. J. hidentatus, 

 (Imel. S. N. p. 2685, (? ; H. bideutatus, Gr. I. E. ii. 412, J ; Thorns. O. E. xix 2081. 

 Var. H. inoestus, Gr. I. E. ii. 412, ^. 



Head confiuently punctate, black ; internal or frontal orbits often 



whitish, $ also with cribrary organs sometimes white, the ? palpi and 



mandibles ferrugineous ; vertex narrow ; clypeus and cheeks produced, 



former separated and the lateral fovea deep. Antennae long and slender, 



basal flagellar joint thrice longer than broad ; of $ compresso-dilated 



beyond centre, white banded ; of (?with scape beneath and, rarely, central 



joints white. Thorax dull, black ; S with linear callosities at radix and 



pronotum usually white ; notauli distinct ; metathorax 



'^^f^=^/ rugose, laterally coarsely punctuate, basal sulcus profound ; 



upper areae usually complete, juxta-coxal costa obsolete; 



'^oi^H°pfrnictofu^^ dentiparal with strong, acute apophyses ; areola slightly 



elevated, of $ semi-oval, of S semi-circular or semi-lunar, 



often emarginate at base and apex, its costae strong. Scutellum more or 



less white, strongly convex, shining and finely punctate ; perpendicular 



