162 Rev. T. A. Marshall's monograph of 



reaching in repose much beyond the extremity of the abdomen ; 

 nervures pale, with some dark portions (as in Ophion and other 

 testaceous insects) ; radius straight, originating usually beyond 

 (seldom from) the middle of the stigma ; pobrachial areolet longer 

 than the praebrachial. Legs stout, proportionally shorter than 

 those of Blacus ; the hind tarsi, especially, are miich shorter than 

 their tibiae. The British species may be recognised at a glance, 

 even by their size. 



Antennae 33 — 34- jointed ; terebra scarcely half as long 



as the abdomen, straight; length, 2i lines . . 1. sticticus, Fab. 



Antennffi 29 — 30-jointed ; terebra as long as § of the 



abdomen, falcate ; length, 1^ — 2 lines . . . . 2. falcatus, Nees. 



1. Pygostolus sticticus, Fab. 



Ichneumon sticticus, Fab., E. S., SuppL, 229; Cryptus 



sticticus, Fab., Piez., 89, ? ; P. sticticus, Hal., 



Ent. Mag., ii., 459; Euthe, Berl. ent. Zeit., 



1861, p. 162, 2 . 



Bassus testaceus. Fall., Spec. Hym. (not of Fab.), ? . 



Blacus gigas, Wesm., Nouv. Mem. Ac. Brux., 1835, 



p. 99, ? . 

 Rufo-testaceous, smooth and shining ; eyes, stemmaticum, occi- 

 put, variable portions of the mesothorax and pleurae, the pectus 

 and sometimes the scutellum, also the metathorax, and base of the 

 1st abdominal segment, fuscous. Palpi whitish. Antennae dull 

 ferruginous, darker towards the tips, each joint of the flagellum 

 annulated with fuscous at the extremity. Metathorax punctato- 

 rugose, without raised lines or areae. Wings hyaline, stigma 

 yellow ; costa, radius, anal nervure and part of the praebrachial, 

 fnscous, the other nervures ferruginous ; cubital nervure obsolete 

 for a great poi'tion of its length. Abdomen shorter than the 

 thorax, and at its widest part not narrower, oblong-ovate above ; 

 if viewed laterally, obliquely truncate behind ; the sides of the 1st 

 segment diverge as far as the obtusely prominent tubercles, which 

 are placed before the middle ; thence to the apex the sides are 

 nearly straight and parallel ; 1st segment minutely aciculated, the 

 rest smooth ; suturiform articulation faintly visible at the sides. 

 Valves of the terebra lanceolate, stout, black, pilose. Male 

 unknown. Length, 24 ; wings, 6 Hn. 



Not common ; a solitary parasite of Tenthredinidce, 

 and sometimes of Lepidoptera. It has been bred from 

 Nematus rihesii, Scop., and Macrophya ribis, Schr. In 

 Scott's collection I saw one reared from Pterostoma 



