325 



Genus TKYPHON, Fin. 



Tryphan, Fallen, Specim. Hym. 1813, p. 16 ; Holmgren, Sv Ak. 

 Handl. 1855, p. 185. 



GENOTYPE, T. signator, Grav. 



Head transverse, not or hardly dilated behind the eyes ; frons 

 sometimes centrally tuberculate ; clypeus broadly rounded and 

 not dentate at apex, very often transversely elevated beyond its 

 centre ; labrum hardly exserted ; mandibular teeth of equal length. 

 Antennae filiform. Thorax stout, with the upper metanotal areae 

 often distinct. Abdomen subsessile ; basal segment a little con- 

 stricted basally throughout, generally with very distinct carinae 

 and a central longitudinal sulcus; its spiracles subcentral ; second 

 segment with distinct basal thyridii ; terebra straight and short. 

 Legs normal, with the femora somewhat short and stout ; tarsal 

 claws not pectinate ; hind tibiae bicalcarate. Areolet nearly 

 always present, irregular and usually petiolate. 



Ranye. Palaearctic and Nearctic Regions, Celebes. 



Under this genus Gravenhorst placed an amazing medley of 

 species in 1829 ; and only a part of them were elucidated by 

 Holmgren in his restriction of it in 1855. It has consequently 

 been impossible to tell how many of those still included under 

 this head have a right to a position there, first because probably 

 all the male PEMPLHTJI have not yet been relegated to their true 

 position, and secondly because Forster, in 1868, split it up to a 

 bewildering extent upon very trivial characters. Only one species, 

 Tryphon lutorius, Smith (Proc. Linn. Soc. 1860, Suppl. p. 60), 

 from Celebes, has hitherto been described from Asia. That herein 

 placed by me appears to belong to the subgenus Civlocomis, Fdrst. 

 (Verb., pr. Rheinl. 1868, p. 203), since the interantennal tubercle 

 is longitudinally sulcate above ; but this should, I think, be 

 treated as a nomen nudum : no generic type is indicated, and no 

 species has hitherto been discovered which falls therein. 



In Europe this genus is an extremely abundant one, its species 

 being met with about midsummer upon every umbelliferous 

 flower, but from India I have seen only a single specimen. It is 

 said to prey parasitically upon TENTHREDINIDJS. 



232. Tryphon antennatus, sp. n. 



d . A large, dull black species, with the tibiae and centre of 

 abdomen red. Head strongly transverse and narrow posteriorly ; 

 eyes prominent ; vertex narrow and the frontal horn small, with 

 its lateral carinae extending to the apical ocellus ; face and the 

 continuous clypeus deeply and coarsely punctate, with sparse 

 piceous pilosity ; mandibles strong, dull red, with their base alone 

 punctate and apex equally bidentate ; palpi pale. Antenna 

 slightly longer than the body, not slender, filiform, with the 



