Hemiteles.] BRITISH ICHNEUMONS. 123 



3. fulvipes, Grav. 



Hemilehs ftilvipes, Gr. I. E. ii. 792; Ratz. Ichn. d. Forst. i. 150; iii. 151, pi. vii. 

 fijj. 6 ; Tasch. Zeits. Ges. Nat. 1865, p. 124 ; Thums. O. E. x. 968 ' ; Schm. Term. Fiiz. 

 1S97, p. 506, 6 9 ; (/. Bridg. Trans. Ent. Soc. 1883, p. 56. Var. (?) //. sodalis, Ralz. 

 Ichn. d. Forst. i. 151, cJ ; ii. 168; iii. 152, 6 9 ; cf. Brisch. Dent. Ent. Zeit. 1877, 

 p. 287. 



Head willi the mouth stramineous, frons dull and genal costa con- 

 tinuous ; clypeus mutic,. discreted, short, apically straight and centrally 

 refle.xed ; mandibles basally geniculate, with the lower margin sinuate. 

 Antennae setiform, longer than half the body, with the scape excised and 

 sub-globose; of $ fusiform-setaceous with the scape usually red beneath, 

 of 6 with the scape pale citrinous at least beneath and the three following 

 joints gradually darker. Thorax gibbulous ; pronotum with a short central 

 carina terminating on either side in a deep fovea ; mesonotum dull, coria- 

 ceous, densely and very finely [jubescent ; metathorax confusedly rugose, 

 with two distinct transverse costae, the areae not very distinct, areola 

 apically acuminate and basally rounded. Abdomen ovate, deplanate, as 

 broad as the thorax ; basal segment densely and very finely striate with no 

 tubercles, gradually strongly dilated towards the apex, only basally bicari- 

 nate and, especially in c?, a little longer than apically broad; second 

 and third segments centrally transversely impressed ; terebra one-fourth 

 the length of the abdomen ; S with two red, curved and far-exserted 

 anal styles. Legs normal, flavous ; the anterior coxae and trochanters 

 stramineous, hind ones black with the trochanters white ; hind tibiae at 

 base and apex, and the $ tarsi, infuscate. Wings normal, sub-hyaline ; 

 stigma pale piceous, emitting the radial nervure from its centre ; tegulae 

 and radix white ; areolet pentagonal with the outer nervure very fine or 

 obsolete ; discoidal cell apically acute ; nervelet indicated, nervellus ante- 

 furcal and not intercepted. Length, 3-4 mm. 



Bridgman says (he. cit.) it is distinguished from his H. suhmarginatus 

 by the points enumerated under the latter species, and calls attention to 

 the $ anal forceps, which are of very unusal length and recall those found 

 in the Ophionid genus Mesochorus. 



Hemiteles socialis differs somewhat extensively from the type form in its 

 stronger abdominal sculpture, that of the second segment becoming even 

 granulate and sub-rugose. At Easton Broad in Suffolk, late in September, 

 I goo, I swept a small $ H. fulvipes with piceous legs and the basal seg- 

 ments dully coriaceous with their apical margins glabrous and sub callose. 

 It appears to vary considerably. 



The economy of H. socialis is somewhat fully described by Ratzeburg 

 (loc. cit.): Nordlinger first bred it from the yellow cocoons of Alicrogaster 

 crataegi, which were clustered on the underside of a larva of Pieris 

 brassicae ; it emerges in the middle of September. Subsequently fifteen 

 specimens emerged at the end of June from twenty cocoons of Apantcles 

 oclonarius, parasitic upon Lithosia quadra, in about twelve days. Ratze- 

 burg supposed the Hemiteles to oviposit in the larvae of the Apanteles 

 during the few hours they lie exposed, between emerging from their host 

 and spinning their own cocoon ; but Brischke (loc. cit.) says that he took 

 at the beginning of August, 187 1, a 9 H. fulvipes running busily among 



1 Thomson's "fulvipes, Grav." (O. E. 854) is a lapsus calami for rujipcs. 



