BRITISH ICHNEUMONS. 215 



sometimes a dot on the post-scutellum, white. Abdomen black ; three 

 basal segments, except occasionally the petiole, and base of fourtli, red ; 

 the three apical apically margined, and the fourth often dotted, with white ; 

 })Ost-petiole glabrous, with a few scattered punctures and sometimes a 

 central foveola ; gastrocaeli deep, transverse, with the intervening space very 

 narrow ; fourth ventral segment of S plicate, its valvulae entirely exserted 

 and very large, black, often white at the apex ; terebra of ? short, obtuse. 

 Legs somewhat slender, black ; tibiae and tarsi, except apices of posterior, 

 and also rarely the apically attenuate femora, red. Wings a little clouded ; 

 stigma flavous ; areolet narrowed, though not coalesced, above. Length, 

 10-12 mm. 



Wesmael, in 1849, described a variety, called concolor by Berthoumieu, 

 which has the basal segments black, the second and third with a narrow 

 red margin, and the hind tibiae only centrally red. 



The Scandinavian T. femora/is, Thoms., which is not unlikely to occur 

 in northern Britain, resembles the present species in size and stature and 

 colour, but may be known by its red legs, its duller, more closely and 

 finely punctate central segments and by the hypopygium of the ? not 

 concealing the terebra. It is the only other known species of the genus. 



T. strigaforius, which is found somewhat extensively among herbage on 

 the Continent, has been bred, as well as its variety, from Heliothis dipsacea. 

 It was recorded from Britain, by Marshall, in 1870, and I possess examples 

 from Hamm, taken probably about Oxford, and in Capron's collection, 

 taken probably about Guildford ; it is certainly uncommon with us. 



EURYLABUS, Wesmael. 



Wesm. Nouv. Mem. Ac. Brux. 1844, p. 150. 



Head with cheeks and temples more or less strongly dilated ; vertex 

 somewhat broad ; frons excavate ; clypeus sometimes elevated, apically 

 truncate, not incrassate ; mandibles bidentate. Antennae setaceous, not 

 obtusely dentate ; basal flagellar joints cylindrical. Thorax stout ; notauli 

 distinct ; metanotum with areae usually entire and apophyses nearly 

 always strong and large ; spiracles elongate. Scutellum flat, with the lateral 

 carinae not extending beyond its centre. Abdomen black, sub-linear, 

 elongate-fusiform or sub-ovate ; not apically truncate ; ventral segments of 

 ? nearly reaching apex of abdomen ; basal segment curved, with post- 

 petiole elongate, flat, neither rugose nor transverse ; thyridii situated near 

 basal margin of second segment. Front tarsi with no spines ; hind tibiae 

 slightly arcuate, sometimes sub-incrassate. Wings normal ; areolet laterally 

 narrowed, and often coalesced above. 



Tabic of Species. 



(2). I. Abdomen broad ; hind legs incrassate ; cly- 

 peus porrect i. DIRUS, Wcsvi. 



(i). 2. Abdomen narrow ; hind legs normal ; clypeus 

 deplanatc. 



(4). 3. Hind tibiae and tarsi entirely red ; head and 



scutellum pale-niarkcd 2. LARVATU.s, Christ. 



(3). 4. Hind tibiae and tarsi mainly black ; head and 

 scutellum immaculate. 



(8). 5. Apophyses distinct ; antennae not red above. 



