Perilissus | BRITISH ICHNEUMONS. 261 

anterior trochanters are flavescent with black markings. My example 
was captured by Mr. W. H. Tuck, M.A., on 13th June, 1900, at Tostock, 
near Bury St. Edmunds. 
8. naevius, Gel. 
Ichneumon naevius, Gmel. S. N. 1790, 2699, ¢. Mesoleptus limitaris, Gr. I. 
E. ii. 14; Ste. Ill. M. vii. 213, 2; Drews. Arch. f. Naturg. 1836, p.36, ¢; Ratz. 
Ichn. d. Forst. ii. 119, ¢ ¢. Tryphon naevius, Gr. I. E. ii. 152, excl. ¢ e¢ var. ; 
Ste. Ill. M. vii. 236, part. ; T. limitaris, Blanch. Hist. Nat. Ins. iii. 307. Mesoleius 
naevius, Holmer. Sv. Ak. Handl. 1854, p.70, ¢ @. Perilissus limitaris, Holmgr. 
Lic. 1855, p. 124, cf. 1856, p. 379; Thoms. O. E. ix. 913, ¢ 9. 
Somewhat dull and closely punctate, with abdomen not red-marked. 
Head subcubical and dull, closely punctate; @? with the discreted clypeus 
and mouth flavous or red, g with face and cheeks also concolorous ; 
mandibular teeth obtuse and of subequal length. Antennae fully as long 
as body, slender, filiform and infuscate, testaceous with scape flavous 
beneath. Thorax black with a line or dot before radices and a pectoral 
mark in 9 castaneous and in 6, together with margin of prothorax and 
pleural suture, flavous; metanotal areae always distinct, the lateral broad 
and very rarely discreted by costulae. Scutellum rarely apically pale. 
Abdomen subfusiform and black with at least segments four to seven 
laterally, and narrowly at their apices, whitish; basal segment very 
closely and coriaceously punctulate, dull, basally narrow, laterally finely 
margined and gradually explanate apically, with postpetiole longer than 
the centrally subconstricted petiole and not sulcate; venter flavidous ; 
terebra shortly exserted. Legs normal and fulvidous, sometimes with the 
anterior basally flavidous; tibiae flavescent; hind tarsi and apices of 
their tibiae infuscate ; tarsal claws almost pectinate. Wings ample and 
hyaline, stigma infuscate, radix and tegulae flavescent ; areolet triangular 
and subpetiolate ; discoidal cell subacute below ; nervellus slightly ante- 
furcal and intercepted nearly in its centre. Length, s—8 mm. 
It occurs during May and June in Germany, Sweden, Denmark and 
France; it was bred by Drewsen from Wematus ribesit, Scop., according to 
Ratzeburg (/.c.) and by Brischke (Sch. Phys. Ges. Konig. 1871, p. 71) 
from larvae of the synonymous JV. venfricosus. Stephens says it used to 
be found about London, but gives July, a month into which it does not 
appear to extend, though there are several from his collection in Mus. 
Brit., along with a male named by Gravenhorst, and one taken in the 
Plumstead marshes by Marshall. This is certainly a garden insect and is 
doubtless beneficial in destroying the gooseberry saw-fly there. I have 
a long series from Redland near Bristol, where Charbonnier used annually 
to take it in his garden during May; Esam has given it me from Hastings, 
Piffard from Felden, Adams from Lyndhurst in June and Capron from 
Shere. It has occurred to me rarely: in a Newport garden in Isle of 
Wight as late as 25th June, 1907, and sitting on a lilac bush ina Tudden- 
ham garden early in June, rg1o. Stenton has a long series from 
Wimbledon. 
