Hetuiteks.] BRITISH ICHNEUMONS. 129 



distinct transverse costae and the lateral ones indistinct ; petiolar area 

 discreted. Abdomen with the segments apically and laterally red ; the 

 basal gradually explanate and aciculate througliout, with no tubercles ; 

 the two following closely and confusedly punctate ; terebra one-third the 

 length of the abdomen. Legs pale red ; anterior coxae and trochanters 

 white ; hind legs with the coxae basally black and their tarsi, a[)ices of 

 tibiae and a band before their base, infuscate. Wings not clouded ; stigma 

 and costa stramineous, radix and tegulae white ; areolet pentagonal with 

 the outer nervure nearly wanting. Length, 3-5 mm. 



Closely allied to H. varitarsus and H. infirmus in the not triangular 

 basal metathoracic area, V fusiform antennae, intercepted and evidently 

 antefurcal nervellus, but differing in its densely tomentose clypeus and in 

 its sub-quadrate and uniformly punctate second and third segments. 



It is said to occur in August, and has been bred in Lynn in Norfolk 

 by Atmore from LithocoUeiis Frdlichiella (Bridgman), and captured at 

 Bickleigh in Devon, in June and September (Digncll). It has a limited 

 Continental range from Sweden to Prussia, where Brischke bred a variety 

 of this species hyperparasitically, through Alicrogaster sp., from Diloba 

 caeru/eocep/ia/a, Acronycta psi and Botys verticalis (Bridg.-Fitch.). 



ID. infirmus, Grav. 



Hemiteles infirmus, Gr. I. E. ii. 797 ; Tasch. Zeits. Ges. Nat. 1S65, p. 126 ; Schm. 

 Term. Fiiz. 1897, p. 509 ; Thorns. O. E. x. 969, ?. 



A slender, shining, black species. Head broader than thorax, with 

 the clypeus distinctly discreted and apically straight; cheeks nitidulous. 

 Antennae filiform, sub-incrassate towards the apices. Metathorax with 

 the basal area not triangular. Abdomen black, oblong-ovate, with the 

 apex of the second segment as broad as the thorax ; basal segment towards 

 its apex gradually dilated, canaliculate and twice longer than broad; terebra 

 half the length of the abdomen. Legs flavous ; hind ones with the tarsi 

 infuscate, apices of tibiae, base of coxae and sometimes the femora above, 

 determinately black. Wings ample and hyaline ; stigma large but not 

 broad, testaceous ; radix and tegulae white ; areolet with the outer nervure 

 nearly wanting. Length, 3-4 mm. 



Closely allied to H. varitarsus, but differing in its nitidulous cheeks, 

 size of its stigma, red or stramineous apices of the segments, the second 

 being apically punctulate, aciculate or sometimes smooth. From H. similis 

 it may be known by its shorter, gradually dilated petiole ; and from 

 H.fulvipes by its more filiform and slender antennae, longer terebra and 

 narrower post-petiole. 



This species was introduced as British by Marshall in 1S70, but I know 

 of no details of ca|)ture and have recognized no examples of it; on the 

 Continent it is only found in C.ermaiiy and Sweden. 



II. necator, Grav. 



Hemiteles necalor, Gr. I. E. ii. 829 ; Tasch. Zeits. Ges. Nat. 1S65, p. 122 ; Schm. 

 Term. Fiiz. 1S97, p. 511, <J ?; Ratz. Ichn. (1. Forst. iii. 154, i, 



A small and delicate species with entirely glabrous abdomen. Head 

 sub-buccate and nitidulous, with the vertex somewhat broad ; palpi, 

 mandibles and labrum stramineous and the clypeus discreted. Antennae 



K 



