60 ICHNEDMONID.E. 



Genus ECHTHRUS, Grav. 

 Echthrus, Graveuhorst, Ichn. Eur. iii, 18:^9, p. 861. 



Gexoxype, Ichneumon rcluctator, L. 



Head subcubical and rectangular ; clypeus short aiid discrete, 

 with an apical laniellit'orin pi-qjection ; eyes oval and ])rominent. 

 Antennae normal or slender, tiliforni, usually white-banded and 

 always with the apices of the slender flagellar joints subincrassate. 

 Thorax cylindrical and not short; notauli distinct, niesosternal 

 sulci entire ; metathorax rugose, with the areae more or less, and 

 the petiolar area, entire; spiracles small and subcircular. Scutellum 

 slightly convex, triangular and apicalh' obtuse. Abdomen stout, 

 elongate, subpetiolate and convex, nearly parallel-sided in (S , 

 shorter and oblong-ovate in 5 ; basal segment narrower than the 

 following and shallowly canaliculate, with the petiole stout and 

 gradually constricted basall}" ; postpetiole longer than broad, and 

 in 5 apically dilated, slightly longer and a little broader than 

 the petiole; abdomen nearly smooth; terebra about as long as 

 the abdomen or body, and emitted from a ventral fold. Legs not 

 short ; front tibia;, especially in 5 , inflated and sharply constricted 

 basally; fourth tarsal joint bilobed ; claws simple. Wings some- 

 what ample and usually clouded ; nervures strong, areolet large 

 and pentagonal. 



Range. North West Europe, Sikkim, United States, Canada, 

 Vancouver, Japan. 



Ratzeburg thought this genus hardly distinct from Xorides, but 

 Taschenberg calls attention to the similarity of theantennal joints 

 to those of Cruptus and of the shape of the thorax to that of 

 Ephialtes. Thomson (Opusc. Ent. viii, p. 776) says that this genus 

 forms a connecting link between the Crtptin.t: and the present 

 subfamily, from all the other genera of which, except Torhda, the 

 pentagonal areolet, entire mesopleural sulci and ])etiolar area, 

 inflated front tibiae of $ and bilobed fourth tarsal joint, Mill dis- 

 tinguish it. His Macrocriiptus (XyhjiJiritrns, Forst.) was erected 

 for the reception of E. landfer, Grav., which was placed among 

 the CiiYPTiNiE (op. cit. V, p. 486) on account of its hardly bor- 

 dered ])etiole, the spiracles of which are further behind the 

 centre {cf. Ichu. Brit, ii, p. 326, et iii, p. 3). 



23. Eclithrus maculiscutis, Cam. 



JEchtJirus maculiscutis, Cameron, Tijds. Ent. 1907, p. 94 ( $). 



A black species, with profuse citrinous markings. Head with 

 the face, except a central mark, and the clypeus citrinous, some- 

 what strongly and sparsely punctate ; labrum, a basal mandibular 

 mark, palpi and nearly the whole of the orbits, citrinous ; upper 

 half of frons not very strongly, but closely and regularly, punctate. 

 Thorax black, with the base of the prothorax, an irregular line at 



