Catalogue of British Ichneumonida. 343 



5th about one and a half times longer than wide. Thorax some- 

 what elongated, the metathorax longer than the mesothorax, no 

 trace of scutellum ; a transverse line separates the superior from 

 the posterior face of metathorax ; both meso- and metanotum 

 somewhat rounded, the latter higher than the former ; thorax about 

 twice as long as high. Abdomen rather nan-ow, subcylindrical, 

 not wider than the head, pubescence dense, scarcely more scattered 

 at the apex ; the hair-pits are more strongly developed than usual ; 

 1st segment rather narrow, about two and a half times as wide at 

 the apex as at the base ; spii'acles not very distinct (from these to 

 the apex sides straight and gradually widening) ; between the 

 spiracles about twice the width of the base ; remaining segments 

 transverse ; aculeus rather longer than the 1st segment. 



Head black ; antennae brown, apex darker ; 2nd and base of 3rd 

 joints reddish ; pro- and mesothorax brownish red ; metathorax 

 reddish brown, paler on middle of back ; abdomen brown-black ; 

 1st segment and all the margins of the 2nd red ; legs red ; apex of 

 hind femora, apex and before the base of hind tibiae, shghtly tinged 

 with brown. Female. Length, 3 mm. 



Taken by Dr. Capron in the neighbourhood of Shiere, 

 1884. 



Pezomachus Foersteri, n. s. 



This very distinct species comes next to P. sjjuriiis in 

 Forster's table (iv. 2, * a. hh. c). 



Niger, pedibus rufis. 



Head behind the eyes rather narrow; antennae reaching about 

 to the apex of the 1st segment of the abdomen ; 1st joint of 

 flagellum slightly longer than the 2nd, about two and a half times 

 longer than wide ; 5th rather longer than wide ; thorax rather 

 stout, scarcely longer than high, the meso- and metathorax of about 

 equal length ; the transverse ridge of metanotum terminates 

 laterally in a rather short acute sj)ine ; 1st segment of abdomen 

 with spiracles scarcely projecting, about three times as wide at the 

 apex as at the base, and about twice as long as the vsddth of the 

 apex ; abdomen ovate ; apex of the 3rd segment the widest ; 

 aculeus almost longer than the 1st segment ; abdomen covered 

 with scattered pubescence. The abdomen is the same shape as in 

 P. instabilis, but the insect differs from that species in the shorter 

 antennae and thorax. 



Black; 2nd and base of 3rd joints of antennas and legs red; 

 apex of hind femora, apex and before the base of middle and hind 

 tibias, and apical joints of tarsi very faintly browned. Female. 

 Length, 2-75 mm. 



