BRITISH ICHNEUMONS. [Echthrus. 



entirely red, the fifth and in 9 apex of the first broadly also red or 

 castaneous ; first segment twice longer than apically broad, basally 

 bicarinate and a little dilated towards the apex ; postpetiole dilated from 

 the spiracles to its centre and thence parallel-sided ; the two basal seg- 

 ments roughly shagreened, and the third obsoletely transaciculate ; venter 

 of 9 plicate ; terebra black and about as long as the body with the 

 sheaths not pilose and the spicula castaneous, becoming hardly in- 

 crassate before the acuminate apex. Legs elongate, slender and red ; 

 coxae, trochanters, hind tarsi and usually their tibiae black, posterior 

 femora and more or less of the intermediate tibiae also sometimes black ; 

 front tibiae of 9 strongly, of ^ slightly, incrassate and basally constricted. 

 Wings slightly and equally clouded throughout and not centrally darker ; 

 ramellus distinct, areolet emitting recurrent nervure from its centre ; 

 nervellus intercepted distinctly below the centre. Length, 10-13 n^iii- 



I'he colouration of the legs is variable. The conformation and 

 sculpture of the two basal segments, the uniformly infumate wings and 

 position of the nervellus will at once distinguish this species. 



This is the most widely distributed species of the genus in northern 

 Europe and probably the commonest in Britain, though I have not met 

 with it myself. Piftard has given me the female from Felden in Herts ; 

 Adams took it at Lyndhurst in the New Forest towards the end of June, 

 igo2 ; and Chitty has found it near Faversham. Nothing a})pears to be 

 at present known respecting its economy. 



2. nubeculatus, Grav. 



Echthrus nubeculatus, Gr. I. E. iii. 866, cf '^ ; cf. Bridg. Trans. Ent. Soc. 

 1887, p. 379. 



Head closely and coarsely punctate ; cheeks finely and alutaceously 

 punctate ; face clothed in short white pilosity with the epistoma and 

 orbits slightly elevated ; clypeus and mandibles somewhat large, the 

 lower tooth of the latter a little the longer. Antennae black, of (J half 

 longer than the body, of 9 ^vith the tenth and eleventh joints white. 

 Thorax and scutellum black, the former closely and coarsely punctate ; 

 mesonotum shining, as also are the broad and semi-circular external and 

 the triangular basal areae ; the remainder of the metathorax coriaceous, 

 with the areola laterally wanting and petiolar area basally entire. Abdomen 

 closely punctate, castaneous with the first segment basally, and in 9 the 

 anus more or less, infuscate ; basal segment stout, convex, apically 

 glabrous, laterally shagreened with the feeble central furrow not reaching 

 the apex and the sides margined, its spiracles central ; remaining segments 

 smooth with the sides and anus obsoletely pilose ; venter in both sexes 

 plicate ; terebra hardly longer than abdomen, black with the spicula 

 castaneous and very distinctly incrassate before the acuminate apex. 

 Legs with the coxae and trochanters black ; femora castaneous, the 

 anterior from base to near apex beneath, and the hind ones with a basal 

 mark, black ; front tibiae rufotestaceous, posterior castaneous ; tarsi 

 infuscate with the first joint of the front ones basally beneath and their 

 calcaria distinctly arcuate. Wings somewhat clouded with the apex and 

 a discoidal fascia darker ; radix and tegulae infuscate ; nervellus sub- 

 opposite and intercepted only slightly below the centre. Length, 10 mm. 



