1 88 BRITISH ICHNEUMONS. \Pezomachus. 



hardly longer than the scape ; fifth as long as broad. Thorax finely and 

 closely punctate, with meso- and mela-thorax of equal length ; petiolar 

 area slightly impressed centrally, with its basal costa sub-obsolete, and 

 apophyses very small and low. Abdomen very closely punctate and pilose 

 throughout, the punctures rather distinct, the interstices not reticulate and 

 pubescence elongate ; petiole long, with tubercles more or less prominent; 

 post-petiole not transverse moderately broad apically ; terebra of variable 

 length, usually nearly half the length of the basal segment, sometimes 

 barely visible. Legs stout, with long and stout calcaria. 



Head black, with clypeus usually red-bordered and the face more or 

 less red-marked ; palpi and mandibles red. Antennae with the ten basal 

 joints fulvous, the remainder piceous ; scape often infuscate. Thorax and 

 abdomen clear red, the latter with three usually very conspicuous black 

 bands of variable extent in the centre of the second and third segments 

 and at base of the latter ; the third and fourth segments sometimes in- 

 fuscate, with or without red margins ; sheaths of the spicula black. Legs 

 red, with the apex of the hind and sometimes intermediate femora and 

 tibiae piceous, as also is the apical tarsal joint. 



$ . Winged. Head contracted behind the eyes and towards the mouth ; 

 cheeks compressed ; clypeus discreted, small, shining and apically rounded. 

 Antennae elongate, filiform and slender. Thorax dull ; metathorax more 

 coarsely coriaceous with complete areae and the costulae wanting or ex- 

 ternally obsolete ; areola hexagonal and apically truncate ; petiolar area 

 high and finely transcostate ; apophyses wanting. Scutellum somewhat 

 large, elevated and not margined. Abdomen narrow and cylindrical ; 

 petiole elongate and narrow with very prominent tubercles, post-petiole 

 parallel-sided and not much broader ; second and sixth segments not 

 broader than long, closely subgranulose-aciculate. Legs sub-elongate. 

 Wings ample with the basal nervure sub-vertical, apical abscissa of the 

 radius but little longer than the basal ; nervellus strongly antefurcal. 

 Finely and closely punctate, with long pilosity. 



Black, with the palpi testaceous. Two basal flagellar joints and often 

 most of the prothorax rufescent. Wings not infumate ; stigma testaceous, 

 or black with the base white; radix rufescent, tegulae flavous. Abdomen 

 with apex of the first segment, whole of second or all its margins, and the 

 sides of the third, red. Legs bright red, with the coxae sometimes black ; 

 apex of the hind tibiae and of their tarsi piceous. Length, 3-5 mm. 



There is a poor figure of the ? in Wood's " Insects at Home," pi. x. 



fig- I- _ 



I fail to detect any discrepancy between the above-described $ and 

 that of Kriechbaumer (loc. cit.) except that the latter has only the annellus 

 red, the whole of the fourth and extreme apices of the fifth and sixth 

 segments concolorous ; he does not mention the sculpture of the second 

 segment. 



Bridgman bred P. zo?iatus from a spider's nest, which looked like a 

 small dab of mud, on the end of a blade of grass, and adds that the larva 

 did not require all the eggs which the nest contained for its sustenance, 

 and consequently many little spiders were afterwards hatched (Entom. 

 1878, p. 35); both sexes are represented in his collection. In 1879 he 

 bred two specimens from the same host, one of which has but two slight 



