BRITISH ICHNEUMONS. I77 



tennae setaceous, black ; of $ stoutish, white-banded, flagellar joints four 

 and five quadrate ; of with flagellar joints sub-dentate. Thorax black, 

 sometimes with a white line beneath, and in S another before, the radix ; 

 pronotum hardly striolate ; metathorax roughly punctate ; areola quadrate 

 or transverse ; costulae sub-obsolete ; apophyses entirely wanting ; spiracles 

 sub-oval, not elliptic. Scutellum, at least in part, white. Abdomen black 

 with segments two to four or five red ; both sexes rarely have the abdomen, 

 except the basal segment, entirely red ; basal four segments of $ strongly 

 punctate ; post-petiole aciculate, with its spiracles rotund ; gastrocaeli 

 rather large and deep, the intervening space aciculate-punctate ; fourth 

 ventral segment of S not plicate. Legs black ; tibiae of ? internally 

 flavous ; S with front femora, tibiae and tarsi, mainly stramineous and 

 the hind tibiae externally marked with white at the base. Stigma nigres- 

 cent. Length, 10-14 '^''i''''- 



The variety vespertinus has the abdomen black, with the second and 

 third segments only narrowly red-margined, and the tegulae with a white 

 dot. 



This species is not uncommon on the Continent, where it is found in 

 August, on umbelliferae, and has been bred from Caradrina cubiailaris 

 and TricJiiura crataei^i ; the female hibernates. I am not, however, aware 

 that it has been found in Britain since the very doubtfully authentic record 

 of Stephens, who says he obtained it from Donovan's collection, but knew 

 nothing regarding its history. 



13. messorius, Grav. 



Ichuciitiion /iiesson'iis, Gr. Mem. Ac. Sc. Torin, 1S20, p. 345 ; I. E. i. 529, excl. i, 

 Amblytelcs messorius, Wesm. Nouv. Mem. Ac. Brux. 1844, p. 134 ; Bui. Ac. Brux. 

 1854, p. 130, <J ? ; r/ Mem. couron. Ac. Belg. 1859, p. 64 ; Holmgr. Ichn. Suec. ii. 

 161 ; ikrth. Ann. Soc. Fr. 1895, p. 586, i ? . Cteiiichiieii/Jioii messorius, Thorns. O. E. 

 xix. 20S5, i ? . 



A little smaller and narrower than the following species, the body 

 clothed with brownish pubescence. Head black, somewhat narrowed 

 behind the eyes. Antennae rather slender, rufescent beneath ; of 5 

 white-banded, with the third flagellar joint longer than broad ; of $ black, 

 with the joints sub-dentate. Thorax black, with a white callosity beneath 

 the radix ; areola sub-quadrate, apophyses wanting. Scutellum white. 

 Abdomen black, second and third segments immaculate red, except only 

 the latter rarely in the $ ; first and fourth segments also occasionally for 

 the most part red ; anus immaculate ; post-petiole aciculate ; gastrocaeli 

 and thyridii somewhat large and deeply impressed, with the intermediate 

 space aciculate ; ventral segments two and three with a dark longitudinal 

 apical fold ; hypopygium of the c? not apically acuminate. Legs normal, 

 black ; tibiae red or piceous, front ones internally flavous and the posterior 

 ajMcally or entirely black. Wings somewhat flavescent-hyaline, stigma 

 fulvous or ferrugineous. Length, 12-15 "i'"'''- 



This species may be known from C. divisorius by the more slender 

 antennae and immaculate central segments of the ? , and the $ by its less 

 strongly .serrate flagellum, of which the second joint is not produced as in 

 ampulatorius. The 9 usually has a callosity beneath the radix, and the 

 angles of the pronotum, white ; the $ occasionally a mark before the 

 radix also pale. 



