34 BRITISH ICHNEUMONS. 



Flagellum of antennae strongly incrassate before apex ; areola and 

 segment two of abdomen sulxiuadrate ; sides of scutellum apically not 

 white ; abdomen reddish at the apex only, are the principal distinctions to 

 be noted. 



The female differs from C. vticrosiictus in the narrower cheeks, and the 

 male in its colour. 



Widely distributed on the Continent, and parasitic upon Cosuiia abluta 

 and C. trafezina. In Britain, it is mixed with C. /i/iea/or, but ap]iears to 

 have certainly been taken at Prawle Point, in Devon, by Mr. Parfitt, in 

 August. 



14. microstictus, Grav. 



Ic/iiieumon microstictus, Gr. I. E. i. 480, ? ; Wesm. Bui. Ac. Brux. 1848, p. 334 ; 

 Mem. couron Ac. Belg. 1859, p. 60 ; Thorns. Ann. Soc. Fr. 1886, p. 15 ; Berth, lib. 

 cit. 1894, p. 546, <5 ?. /. iiueator, var. 5, Hohngr. Ichn. Suec, i. 24, 6 ? (et Marsh. 

 Cat.). Coelichneiinion microstictus. Thorns. O. E. xviii. 1909, 6 ?. Var. /. seremis, Gr. 

 I. E. i. 484; Ste. 111. M.vii. 190 ; Wesm. Nouv. Mem. Ac. Brux, 1844, p. 23 ; cf. 

 Bui. Ac. Brux. 1848, p. 334 ; lib. cit. 1857, p. 360, <5 ? . /. lachrymator, Fonsc. Ann. 

 Soc. Fr. 1847, p. 403, i , 



Similar to, though more stout and redder than, the preceding species, 

 Head black ; clypeus bisinuate ; cheeks very strongly inflated ; mandibles 

 and margin of clypeus red ; internal, and usually external, orbits and vertical 

 dots, white, S also with sides of clypeus white. Antennae somewhat stout, 

 compresso-dilated and strongly attenuate ; sixth joint quadrate ; 9 with an 

 eiglit-jointed while band ; entirely black in c?. Thorax black, S with marks 

 on pronotum and at radix white ; areola elongate-quadrate, apically angu- 

 lated ; mesosternum shining, very sparingly punctate. Scutellum very flat, 

 puncturation isolated ; sometimes entirely black, but usually with the basal 

 carinae and the lateral margins white. Abdomen basally black ; segments 

 two to four, and rarely post-petiole, more or less red and dorsally deplanate, 

 apical ones entirely darkish red ; post-petiole regularly aciculate ; gastro- 

 caeli very broad and deep ; intervening space rugosely and closely striolate ; 

 segments two to five basally aciculate in S ■ Legs short and stout, black ; 

 femora and tibiae often red, hind femora rarely black in S ; hind coxae very 

 sparingly punctate, the scopulae rather small and not very dense. Wings 

 with stigma red-brown; tegulae piceous ; areolet wide above. Length, 

 12-17 mm. 



This species differs from C. lifieafor in being always larger, with the ab- 

 domen for the most part castaneous, the head behind the eyes narrower, 

 the forehead above the antennae deeply excavated, and the areola longer ; 

 the $ has the pale antennal band eight jointed, and its posterior coxal tufts 

 are shorter, occupying only the inner part of the apex ; the sides of the 

 post-petiole too, are more closely punctate. 



The variety of this species, /. serenus, Grav., differs from the type in 

 having two ap'cal pale spots upon the scutellum, and in its constantly larger 

 size ; /. lachrymator, Fonsc, is its male. 



It is widely distributed, but rarer than C. lineator on the Continent. 

 Stephens took the var. serenus in the vicinity of London, in June; and 

 I have seen an example taken by Bignell, at Bickleigh, in Devon, in 

 the middle of the same month, as well as a fine female, in Guernsey, by 

 Luff. 



