^18 BRITISH ICHNEUMONS. [Lissom/a. 



strong. Scutellum triangular, with its lateral margins more or less dis- 

 tinctly pale flavous. Abdomen of ^ linear-cylindrical, longer and nar- 

 rower than the head and thorax with its basal segment obsoletely canali- 

 culate, of 9 cylindrical, as long as head and thorax and slightly narrower 

 than the latter, apical margin of the two dull and coarsely punctate basal 

 segments and the pygidium laterally castaneous ; basal segment convex, 

 half as long again as apically broad and impressed before the apex; second 

 and third subtransverse ; terebra a little shorter than the body. Legs 

 somewhat slender, red with the hind ones distinctly stouter ; thinner and 

 longer in ^ ; front and usually the intermediate coxae and trochanters 

 flavous-marked ; hind tarsi dull ferrugineous, the 9 hind tibiae apically 

 and before the base more or less infuscate. Wings normal and somewhat 

 clouded ; stigma and radius piceous, radix and tegulae pale stramineous ; 

 areolet more or less irregular and petiolate, sometimes sessile and pyra- 

 midally pentagonal, emitting the recurrent nervure from near its apical 

 angle. Length, 7 — 9 mm. 



This very distinct species is synonymous with neither L. inison'a, as 

 indicated in jMarshall's Catalogue, nor L. leptogaste?', as was surmised by 

 Bridgman (Trans. Ent. Soc, 1882, p. 163 et 1886, p. 368). The latter is 

 now considered to be Cryptopimpla calceolata, Grav. The basally con- 

 stricted first segment of the J renders it liable to be mistaken for a 

 member of the Tryphonid genus JMesoh^ptus. In the present genus this 

 species is instantly recognised by the laterally pale, or pale-marked, scu- 

 tellum combined with concolourous humeral hamate lines. 



It is not uncommonly found in central Europe, where it was taken in 

 July on umbels and house-windows by Gravenhorst. Bridgman had taken 

 six males of this species in 1882 {loc.cii.) though probably not in Norfolk, 

 since he makes no mention of it in his list of the Ichneumonidae of that 

 county in 1893. It does not appear to have again been taken till 1899, 

 when Tuck sent me a single male, found by him at Aldeburgh, in Suffolk, 

 on 2ist September. The only female I have seen is a more slender in- 

 sect than Mr. Tuck's male, it measures 6^ mm, with a terebra of 7 mm., 

 and flew in to artificial light on the dinner-table of Monks' Soham House 

 at 8.30 p.m., 7th August, 1907. 



26. carbonaria, Hohngr. 



Lissonota carbonaria, Holragr. Sv. Ak. Handl. 1860, n. 10, p. 54, ? . 



Alutaceously punctate, black and a little shining. Head hardly nar- 

 rowed behind the eyes ; frons not impressed nor vertex angularly emar- 

 ginate ; mouth testaceous, cheeks subbuccate with the space between the 

 eyes and the apically testaceous but not tomentose clypeus as broad as 

 the mandibles ; face transverse and somewhat broader than the frons, in 



