236 BRITISH ICHNEUMONS. \Pezomachus. 



not glabrous, distinctly dull and densely alutaceous, and very sparsely 

 pubescent ; black, with the apical margins of the three basal segments, the 

 thyridii and basal angles of third segment, pale red ; first segment not 

 broad, parallel-sided, only slightly broader and distinctly margined beyond 

 the somewhat prominent spiracles, which are situated a little behind the 

 centre, its discal carinae obsolete ; second segment with distinct glabrous 

 thyridii, which are narrower than the intervening space; valvulae large, 

 piceous, far exserted and apically broadly rotundate. Legs slender, clear 

 red, not flavous-marked ; calcaria of normal length ; first joint of front 

 tarsi strongly excised at the base, its calcaria red ; intermediate coxae and 

 apical tarsal joints somewhat infuscate, their calcaria for the most part clear 

 white ; hind coxae entirely, femora and tarsal joints except at their ex- 

 treme bases, and tibiae towards apices, piceous ; hind tibiae slightly 

 intumescent a little before their base ; hind femora sub-canaliculate 

 internally. Wings ample ; hyaline ; tegulae black, radix and base of 

 stigma clear white ; remainder of the broad stigma and the nervures 

 piceous, former emitting the radius a little before its centre ; radius sub- 

 trapezoidal and apically straight ; lower angle of discoidal cell hardly acute, 

 its external fenestra interrupted by a corneous line ; external nervure of 

 the areolet pellucid and sub-obsolete ; nervellus antefurcal ; cubitus of 

 hind wing strongly inflexed in its basal half. Length, 5-6 mm. 



I am quite satisfied that the above $ is the typical insect of Graven- 

 horst's H. pa/pafor, and trust my detailed description will set at rest the 

 uncertainty which has hitherto existed regarding its true position and 

 opposite sex ; it is very positively the $ assigned to F. iriix by Marshall, 

 though I do not find that the mandibles are basally tuberculate, and the 

 colour of the abdomen varies in extent. The ? is said to differ from 

 P. geochares in the longer spiracles and entirely red femora. 



I am unable to ascertain what authority Marshall had for associating 

 the typical $ of Gravenhorst's Heniiteks palpalor'^ with P. trux, but — 

 since Bridgman says (Trans. Ent. Soc. 1886, p. 341) that he sent Pro- 

 fessor Thomson " the species which Mr. Marshall named for Mr. J. E. 

 Fletcher as Hemimachus trux ; this he returned to me named P. insokns, 

 thus confirming my opinion. P. trux must, I think, be removed from our 

 list" — it is evident that the latter was incorrectly included in our fauna, 

 and it appears extremely probable that the ? was, de facto, the present 

 species. 



I have described both sexes above, from seventeen 9 ? and four ^ $ 

 bred together by Mr. A. H. Hamm from Zygaena lonicerae at Shotover, 

 near Oxford, in July, 1900, which are now in my collection. 



H. palpator has been bred from Coleophora melilotella and Eupaecilia 

 atricapitana (Entom. 188], p. 139). P. ittsolens is mentioned from Lynn 

 in Norfolk, and bred from Coleophora fuscedinel/a, C. vibicella and Talae- 

 phora pseudobombycella (Bridgman, in whose collection at Norwich are 

 both sexes of this species on one card) ; captured at Bickleigh, early in 



1 As illustrative of the hopelessness of arriving hitherto at a correct definition of Gravenhorst's 



(?, and also of the present (unprintable word omitted!) condition of our National Collection 



of British Ichiieumonidae, it may be well to point out that the ten specimens standing under Hemitdcs, 

 palpator, in the Natural History Museum, are (i) a J Atractoiics sp.; (2) Exolytus flavipes, Thorns., 

 i; (3) Atractodes exilis, Hal., <?; (4, 5) Hemileles inimicus, Gr., ? ? ; (6) a ? Phvs;adeHOn ; (y) Paiiargy- 

 rops tenuipes, Gr., ?; (8) fkygaUciwii varans, Gr., ?; (9) Phygacicuun lujiilus, Gmel., ?. 



