Exolytus.^ BRITISH ICHNEUMONS. 255 



Nitidulous, sparsely punctate, black. Head cubical, shining and sub- 

 dilated behind tiie eyes ; face sub-pilose, cheeks and temples tumidous, 

 clypeus apically broadly rounded, frons distinctly [)unctate ; palpi pale, 

 rarely infuscate ; mandibles more or less broadly riifescent centrally. An- 

 tennae black ; of ? with the flagellum stout and sub-attenuate apically. 

 Thorax stout ; nietathorax shining with the areae somewhat indistinct ; 

 central area broad and somewhat impressed, dentiparal elongate-triangular. 

 Abdomen nitidulous ; basal segment nearly straight and slightly deflexed 

 at its apex, sub-linear or a little dilated apically, of $ laterally immarginate ; 

 second and third segments mainly or entirely red, with the sfjiracles large 

 and placed far from the sides, which are posteriorly immarginate, the 

 former longer than broad and gradually contracted basally, of ^ some- 

 times only apically red, the latter (juadrate. Legs red, with coxae and 

 trochanters at least partly black ; intermediate femora sometimes basally, 

 hind ones often entirely or partly black ; hind tibiae sometimes and their 

 tarsi apically infuscate. Length, 5 8 mm. 



The size of this species and the extent of the rufescent coloration of the 

 legs and abdomen are very variable. 



[I think there can be no doubt that the following description of P. 

 teneriventris, drawn from Gravenhorst and Taschenberg and supplemented 

 by Brischke, is identical with that of E. laevigafus, though it appears 

 strange that no one has before made use of the sup[)lementary note : — 



(?. Head with the palpi, generally a mandibular mark, and rarely the 

 discreted and apically rounded clypeus, pale red. Antennae filiform and 

 usually with the two basal joints red beneath. Metathorax elongate, 

 deciived throughout, with the lateral areae complete ; areola parallel-sided, 

 basally rounded and apically confluent with the transversely rugose petiolar 

 area ; apophyses wanting, spiracles circular. Scutellum black. Abdomen 

 linear, black, usually with the second segment apically and laterally, the 

 third except its apex, and rarely the base of the fourth, testaceous-red ; 

 basal segment linear, aciculate, with prominent spiracles ; second nitidu- 

 lous and obsoletely punctate. Legs, including all the trochanters, red : 

 hind coxae basally, and rarely most of the anterior, black ; hind tarsi in- 

 fuscate. Wings slightly clouded, areolet sub pentagonal, of variable size ; 

 radix and tegulae stramineous, the latter sometimes infuscate. Length, 

 5-7 mm. 



Gravenhorst's var. i has the second segment as well as the third pale 

 red, all the coxae and trochanters basally black, with the areolet triangular 

 and vertically coalesced. Var. 2, all the femora partly black, the "hind 

 tibiae externally infuscate with the areolet small and sub-triangular. His 

 var. mesozoniiis is more slender, and differs in having the abdomen and its 

 basal segment somewhat shorter, and its size hardly five millimetres ; all its 

 coxae and trochanters black ; the third segment alone, except its margin, 

 red ; and the areolet irregularly pentagonal and sub-pyramidal, with the 

 external nervure obsolete. This last, perhaps, more closely resembles one 

 of the true Atraclodes. 



He says it occurs in August on Uinbelliferae and September on Ans^e/ica 

 sylvesiris ; Stephens professes to have identified it from the London district 

 in June.] 



E. laevi}:;ati/s may be distinguished by its ai)ically spinulose hind tibiae, 

 infuscate coxae, basally entire median nervure of the hind wings, basally 



