BRITISH ICHNEUMONS. I33 



ferrugineous, beneath ; joints six to twenty finely carinate internally. 

 Thorax black, pronotum and humeral lines flavous ; niesonotum strongly 

 and coarsely punctate ; metathorax scabrous, areola transverse. Scutellum 

 flavous, slightly convex. Abdomen elongate-elliptic, black ; apex of seg- 

 ments two and three flavous, base of third rufescent ; post-petiole centrally 

 aciculate, apical angles often flavous ; gastrocaeli large and deeply im- 

 pressed. Legs black ; front femora apically, tibiae and tarsi flavous, the 

 hind ones apically black ; anterior, and sometimes hind, coxae and tro- 

 chanters flavidous. Length, 12-15 ^i""^- 



The c? is very similar to /. ex/enson'us, but the head and thorax are 

 more strongly and coarsely punctate, the former is broader, and the an- 

 terior coxae and trochanters are entirely flavous. The $ hibernates. 



Parfitt says this fine insect would seem to be very rare in Devon, where 

 he took but one example. On the Continent it appears to be uncommon, 

 having a somewhat restricted range through France and Central Europe. 



[It will be seen by the appended description of /. crassorius, Desv., taken 

 by myself, quite independently of any reference to inquinatus, Wesm., 

 from specimens in the British Museum, that these species are identical. 



S . Head black, mouth parts flavidous, face entirely yellow. Antennae 

 not paler beneath, excepting the flavous-marked scape. Thorax black, 

 pronotum and lines at radix flavous ; metathorax scabrous, with only three 

 upper areae of which the areola is strongly transverse, its apex sinuate ; 

 basal sulcus somewhat deeply impressed. Scutellum flavous, distinctly 

 convex. Abdomen black, segments two and three either clear flavous 

 with the apical margins very narrowly black, or entirely black ; fourth 

 segment laterally with a curved or Jriangular flavous mark, broadest in 

 centre ; petiolar spiracles in both sexes tuberculate ; gastrocaeli large, 

 interval aciculate ; ventral fold on segments two to four, Legs flavous ; 

 anterior with femora in part, trochanters and coxae, except apex of front 

 ones, black ; hind legs with femora except extreme base, tibiae narrowly 

 at apex, and coxae black ; all tarsi flavous throughout. Wings faintly 

 flavescent ; all venation and stigma fulvous ; areolet sub-deltoid. 



A"ar. I : post-petiole bimaculated with flavous apically and front coxae 

 usually strongly flavous. 



? . A large, stout insect. Head black ; all mouth parts ferrugineous, 

 frontal orbits rufescent. Antennae stout, distinctly attenuate, white- 

 banded. Thorax black, callosities beneath the radix bright flavous, line 

 preceding it sometimes rufescent. Metathorax with costae and sulcus 

 much less pronounced than in S ; three areae of which the areola is less 

 transverse, sub-quadrate, its apex sinuate. Scutellum yellowish white, 

 somewhat convex, apically finely striate. Abdomen broad, laterally 

 rounded, black ; segments six and seven white-marked ; petiole abruptly 

 dilated towards apex, finely aciculate ; base of terebra not covered by the 

 apical ventral segment. Legs black ; all tibiae and tarsi ferrugineous, 

 posterior apically infuscate ; hind coxae coarsely punctate, with piceous 

 pubescence, but no scopulae. Wings as in S ', costa piceous. Length, 

 15-18 mm. 



In the British Museum are twelve examples from the collections of 

 Desvignes and Stephens ; four of the males appertain to van i ; unfortu- 

 nately no localities arc attached]. 



