Hemiteks.] BRITISH ICHNEUMONS. I53 



pentagonal, willi oulcr nervure vt-ry line; ncrvclcl distinct, ncrvelhis 

 evidently antefurcal. Length, 3-5 mm. 



The slender form and metathoracic sculpture f)f this species are simij.u 

 to H. imhecilliis, l)ut the shorter cheeks, the smooth frons and mesonotum, 

 tlie third and fourth segments of ? entirely or mainly red, of ^ black 

 with the second smooth, the long and thin and sub-t'ililorm nagellum, and 

 the nigrescent posterior coxae, render it distinct. 



This species is probably not uncommon in marshy situations throughout 

 Britain. It is of frequent occurrence in Norfolk and has been bred 

 from Gracillana auroguttella, G. phasianipennella and Coriscium ciiculi- 

 pennelluin (Bridgman) ; Bignell also bred a male from the last-named host 

 on 20th August, 1884. Bred in South Devon from Zygaena filipendulae 

 through a species oi Apante/es, in July ; from Diantliaecia cucubali dX the 

 end of May ; and ca[)tured at Bickleigh early in August (Bignell). Taken 

 in Yorkshire, at Cornworthy, Botusfleming, and bred from Laverna deco- 

 re//a, Ste. (Marshall). Also raised from Clirysoclisla ScJirankella and, 

 perhaps through a species oi Ascogasfer, from Laverna epilobiella (Bridg.- 

 Fitch) ; Maldon in Essex (Fitch) ; several females captured about Shere 

 by Capron, and a doubtful male at Botusfleming by Marshall ; Tuck has 

 found it at Norton Wood, near Bury St. Edmunds, early in October ; 

 Butler at Wymondley in Herts., in August. It has occurred to me in 

 September on the flowers of Foeiiiciilum vulgare at Alderton, and in 

 August on those of Angelica sylvestris at Barton Mills and Brandon, in 

 Suffolk. I am in a position to confirm the doubtful record of this 

 species in the " Natural History of Hastings." 



37. biannulatus, Grav. 



Heiiiileles biaiiiudalus, Gr. I. E. ii. 846; Tasch. Zeits. Ges. Nat. 1S65, p. 123; 

 Brisch. Schr. Nat. Ges. Danz. iSSi, p. 34S, 9; Thonis. O. E. .\. 9S6 ; .Schm. Term. 

 Fuz. 1897, p. 5289, S 9 . 



Black with fine infuscate pubescence ; clypeus discreted and apically 

 broadly rounded ; frons smooth. Antennae sub-filiform and apically in- 

 crassate ; of o black, of ? longer than half body, with joints seven to ten 

 entirely white. Thorax with mesonotum smooth and notauli reaching to 

 its centre ; metathorax smooth with strong costae, rugosities and 

 apophyses. Abdomen ovate, as broad as thorax, witli anus sub-com- 

 pressed ; black with the three first segments red ; basal segment somewhat 

 elongate, gradually explanate and carinate, with no lateral tubercles ; 

 segments two to four with ejiipleurae acute ; terebra rather longer than 

 jjetiole. Legs slender, red ; hind ones usually with tarsi and apices of 

 tibiae infuscate ; coxae and trochanters of i black. Wings grey ; stigma 

 infuscate and not broad, emitting radial nervure from beyond its centre ; 

 radix white, tegulae black, nervellus antefurcal. Length, 4-6 mm. 



Similar, especially in its broad basal segment, to //. ridibiindus, but the 

 antennae and legs are more slender. It may be known from all the 

 species mentioned by Thomson in having the vertex narrower, the clypeus 

 very distinctly discreted, apically rounded and immarginale ; mandibles 

 stout and not gi.-niculate, the antennae stout and basally attenuate, its 

 elongate notauli, distinct metathoracic costae, strong apophyses and sc^me- 

 what stout tarsal claws. 



