Mesoleptus | BRITISH ICHNEUMONS. 227 


12. cingulatus, Grav. 
Mesoleptus cingulatus, Gr. I. E. ii. 22; Ste. Ill. M. vii. 215; Fonsc. Ann. Soc, 
Fr. 1849, p. 211, ¢; Holmgr. Sv. Ak. Handl. 1855, p. 103; Voll. Pinac. pl. xxvi, 
fig.7; Brisch. Schr. Nat. Ges. Danz. 1878, p. 67 et 1892, p. 32; Thoms. O. E. ix. 
922, ¢ 2. M. undecim-notatus, Desv. Cat. 33, ¢. M. submarginatus, Ste. Il. 
M. vii. 214, 2. 
A slender black species, with red legs. Head transverse and con- 
stricted posteriorly ; clypeus, mouth and face stramineous, with the last 
in 2 sometimes black-lined; clypeus strongly punctate, apically de- 
pressed and rounded; frons finely punctulate; lower mandibular tooth 
the longer. Antennae fine, not elongate; scape stramineous, and 
flagellum testaceous, beneath. Thorax black; ¢ with subhamate lines 
before radices, mesosternum and often pronotum apically, stramineous ; 
9 usually with mesonotum discally and mesosternum fulvidous ; meta- 
thorax scabriculous, coarser apically, with upper areae obsolete or want- 
ing; petiolar area longitudinally carinate centrally. Scutellum of 
stramineous, of 2 fulvidous. Abdomen narrow, black with only the 
apices of all the segments and the venter stramineous ; basal segment 
narrow and slender; anus of 9 subcompressed. Legs slender and ful- 
vous, with hind tarsi and apices of their paler tibiae alone nigrescent ; 
hind trochanters centrally and extreme apex of their coxae rarely infus- 
cate. Stigma testaceous; areolet wanting; nervellus intercepted below 
its centre. Length, 7}—9 mm. 
Distinct in its lack of areolet and black, flavous-banded abdomen. I 
have seen Stephens’ and Desvignes’ types. 
It is not an uncommon species throughout western Europe, bred by 
Brischke in Prussia from cocoons of Zenthredo scalaris (Rhogogaster viridis), 
and thought by Fonscolombe to occur as early as April in France. With 
us it can hardly be termed common, though Bridgman says he found it so 
in Norfolk. Hertford in July, 1835, and not common at Darenth and 
Coombe Woods in June (Stephens) ; Tostock in July (Tuck); several at 
Shere (Capron); Felden (Piffard) ; and Lyndhurst in New Forest (Adams), 
where I took it at Wilverley on r1th July, 1909. It has also occurred to 
me by sweeping in a wood at Helpston Heath near Peterboro, upon 
the tables of Heracleum sphondylium at Monks’ Soham in August, and in 
the Bramford Marshes near Ipswich in both June and July. 
13. prosoleucus, Grav. 
Ichneumon prosoleucus, Gr. Mem. Ac. Sc. Torin. 1820, p. 363, ?. Mesoleptus 
prosoleucus, Gr. I. E. ii. 58, 9; cf. Pfank. Zeits. Hym.-Dip. 1906, p.25. M. 
Holmgreni, Thoms. O. E. xix. 1982, ¢ ¢@. M. similis, Brisch. Schr. Nat. Ges. 
Danz. 1878, p. 66,3 2. 
Head posteriorly constricted with the face except a central line, frontal 
orbits, clypeus, cheeks and mouth flavous; clypeus apically subtruncate, 
depressed, transversely impressed and shining; frons broad and dull. 
Scape and basal half of flagellum flavous beneath. Notauli elongate 
and deeper basally; elongate prothoracic callosity and lines before radices, 
with dots below them, flavous; metathorax scabrous, centrally subbicari- 
nate. Abdomen black with segments three to five or six, more or less of 
second, and extreme apices of the anal red, sometimes didymated with 
black; basal segment elongate and narrow, not carinate, with central and 
P2 
