l6o BRITISH ICHNEUMONS. ' \Hemiteles. 



47. persector, Piufitt. 



Hemiteks poscdor, I'ailili, i:.M.M. 1881, p. 184,9. 



A shining S[)ccies with no perceptible sculpture and dull nietathorax. 

 Head transverse ; clypeus distinctly discreted, mandibles and palpi 

 flavous ; cheeks elongate and not buccate ; face shortly pubescent with 

 epistonia somewhat prominent ; facial orbits divergent, sub-ap[)roximating 

 above. Antennae long and slender with joints not (juadrate ; flagellum 

 seventeen-jointed with basal joint longer than second and about five times 

 longer than broad ; three basal joints red. Thorax sub-pubescent with 

 iiotauli indistinct ; metanotum short with areola transverse, laterally 

 rounded, basally indexed and sub-obsoletely costate apically ; petiolar 

 area oblique, discreted and centrally parallel -sided ; spiracles circular. 

 Abdomen ovate with segments transverse, and very short from the fourth ; 

 segments two to four red ; the basal elongate, narrow, apex double 

 breadth of base, with spiracles just beyond centre ; post-petiole bicarinate 

 and centrally sub -canaliculate ; terebra nearly two-thirds of abdomen. 

 Legs somewhat slender ; red, basally paler and with the hind ones darker. 

 Wings with areolet ])entagonal and wanting externally ; apex of discoidal 

 cell further from base than that of areolet ; nervellus sub-op[)Osite and 

 intercepted below centre. Length, 4-5 mm. 



Parfitt says " this insect has the facies of H. gyriiii, but that the basal 

 half of the antennae is red, the thorax quite smooth without any lines or 

 markings and the abdomen is broadly ovate, all of which distinguish it 

 from the former insect." 



It does not appear to have been recognized here or upon the Continent, 

 since it was originally recorded as bred from some pu})ae of Gyriniis 

 7iataiot\ collected by the Rev. J. Hellins, from rushes on the banks of the 

 Exeter canal. It did not, however, emerge till later than H. gyrini 

 (argentatiis^ Grav.), with which it appears to be associated. 



48. tenuicornis, Grav. 



Hemiteles tenuicornis, Gr. I. E. ii. S43 ; Tasch. Zeits. Ges. Nat. 1S65, p. 123 ; Schm. 

 Term. Fiiz. 1897, p. 532, (J ? . 



Head black with clypeus not distinctly discreted. Antennae slender, 

 filiform, rather shorter than body, especially in $ . Metathorax rugose ; 

 costae strong and apophyses sub-acute. xVbdomen of S fusiform, of ? 

 ovate and sub-pilose ; segments two to six red or castaneous, of ? with 

 the seventh and apex of the first concolorous ; basal segment irregularly 

 aciculate, obsoletely carinate, slightly dilated apically, with no tubercles, 

 of 6 sub-linear, of ? smooth and nearly thrice longer than broad ; terebra 

 about half the length of abdomen, black with the spicula red. Legs 

 slender, red or castaneous ; coxae and trochanters black ; posterior tibiae 

 and tarsi with part of the femora infuscate. Wings normal, hyaline ; 

 stigma, costa and tegulae infuscate ; radix whitish ; areolet pentagonal 

 with the outer nervure sometimes obsolete; $ with a dark cloud beneath 

 the stigma. Length, 5-7 mm. 



This species is said to occur in June and vSeptember. It was introduced 

 as British by Marshall in 1870, but I have heard of no records. It should, 



