138 BRITISH ICHNEUMONS. [Bemiteks. 



The hyperparasitic larva consists of thirteen dorsal and fourteen ventral 

 segments, including the head and anus. Like that of the Mesosfem/s, it is 

 primrose-yellow throughout and its lateral border is equally explanate, the 

 segments being obliquely impressed at the longitudinal fold. The central 

 dorsal line (alimentary canal) is noticeably darker on the third to the ninth 

 segments. The second segment appears to have a minute prominence on 

 either side in front, and the third to the eighth are furnished with somewhat 

 arcuatcly placed pseudo-feet. The usual sub-cutaneous granules are visible, 

 though less distinct than in Mesosfeni/s (they probably vary in distinctness 

 at different periods of life). The larva's head is marked as shown in the 

 figure, and the larva which is strongly deplanate, both dorsally and ven- 

 trally, is shaped as in figure 2. 



Castaiieus. nv* "J, . 



I saw no more of this insect after replacing it in its cocoon till the 

 morning of 30th April following, when I found it had emerged as a 

 female Heiniteles castaneiis. It was a most active creature, incessantly 

 vibrating its antennae and poking them into every chink of its prison ; to 

 such an extent did it appear to rely upon the sense of touch that one 

 might suppose its sight defective if it did not at once retreat upon an 

 approach being made. When motionless on a level surface the antennae 

 are deflected and held wide apart, with their apices just touching the 

 ground ; when on a perpendicular surface they are laid back and held 

 close together over the thorax. 



19. pedestris, Fab. 



Iihiietiiji07i peJestris, Fab. E. S. ii. 344. Pezomadiits pedestris, Gr. I. E. ii. SSz ; 

 Ratz. Ichn. d. Forst. i. 154; iii. 149,?. Theroscopus pedestris, Forst. Wiegm. Arch. 

 1850, p. 102, ?. Heiniteles pedestris, Thorns. O. E. x. 993, c? 9 • H- vionozoniiis, Gr. 

 I. E. ii. 802, if. i. Siippl. 712 ; Ratz. Ichn. d. Forst. 152 ; Tasch. Zeits. Ges. Nat. 

 1865, p. 133, i . Var. H. micator, Gr. I. E. ii. 832, excl. 9 . (?) H. castaiieus. Thorns. 

 O. E. X. 971, excl. 9. Pezoniachus vagaiis, Rosenh. Bericht Naturf. Ntirnb. 1845, 

 p. 179 ; cf. Ann. Soc. Fr. 1869, pi. i. fig. 15, 9 . 



6 . Head black with the palpi infuscate ; mandibles sparsely punctate 

 with the lower tooth somewhat the shorter ; clypeus indistinctly discreted, 

 apically reflexed, with a single central sub-acuminate tooth ; face and frons 

 deplanate and coriaceous ; vertex evenly convex and dull. Antennae 

 slightly shorter than the body, setaceous, pilose; black with the base of 

 the cylindrical first flagellar joint alone red. Thorax black and dull, 

 strongly convex and somewhat short ; pronotum with no carinae ; meso- 

 notum dull, closely and evenly coriaceous, anteriorly elevated with the 

 notauli wanting ; metathorax evenly scabrous and convex, with the discal 

 costae entirely obsolete and apophyses wanting. Scutellum coriaceous 

 and somewhat convex. Abdomen elongate-ovate, shortly pilose, black, 

 with the incisures of the first two or three segments castaneous ; basal 



