Exochus | BRITISH ICHNEUMONS. 47 
The typical form is at once recognised by its profuse red markings and 
the var. coronafus—hitherto erroneously accorded precedence—by its 
immaculate posterior orbits, apically pale scutellum, and pale frontal 
orbits. 
[It is impossible to ascribe Haliday’s species (which has the areolet 
wanting ; facial orbits, sternum and anterior legs flavous; hind legs 
fulvous with the whitish tibiae and tarsi apically infuscate) to any of our 
descriptions with certainty; I know none with facial orbits alone pale. 
It was captured at Eyrecourt in Galway during September. | 
Certainly uncommon with us, though Stephens records it from Coombe 
Wood, the New Forest and Shropshire, in June. Beaumont gave me a 
male, taken at Blackheath in July, 1897; but I have only met with the 
females at Ryde in the Isle of Wight, where, however, newly dead 
specimens were not rare in a greenhouse during September, 1900, and 
October, 1901. Van Burgst has taken both forms about Breda in August. 
22. decoratus, Holmgr. 
Exochus decoratus, Holmgr. Ofv. 1873, p. 64, @ ; Thoms. Deut. Ent. Zeit. 1887, 
p. 213, ¢ 2; cf. O. E. xix. 2135 et Szep. Rovart. Lapok. 1898, p.60. (°) E.lictor, 
Hal. Ann. Nat. Hist. 1839, p. 113, ¢. 
A shining black species with profuse pale markings. Head in both 
sexes with the mouth, whole cheeks, face, frontal orbits broadly flavous 
and confluent with the concolorous vertical marks; cheeks short, 
mandibles transversely impressed discally before their base; frons 
obliquely impressed on either side with a subdeterminate triangular cen- 
tral elevation. Antennae elongate and filiform; flagellum fulvescent, 
scape flavous, beneath. ‘Thorax with a triangular callosity before, a line 
below radix and a large transverse mesopectoral mark, flavous ; sternum 
laterally red, pleurae and rarely mesonotum discally concolorous ; 
costulae usually strong, areola apically dilated, spiracles subcircular. 
Scutellum discally and postscutellum flavous. Abdomen with carinae of 
basal segment elongate and the second discally impunctate. Legs 
stramineous with the hind coxae and femora fulvous; hind tibiae whitish 
with the extreme base and above at apex black, their tarsi pale with the 
joints apically fulvidous and claws black. Wings with stigma infuscate, 
radix and tegulae whitish. Length, 64 mm. 
Our only species with short hind calcaria and pale frontal orbits. 
Bridgman introduced it as British on the strength of a single male, 
which was captured at Preston (Trans. Ent. Soc. 1882, p. 160) and I 
possess a couple of broken specimens in Capron’s Surrey collection. It 
is apparently everywhere rare and Holmgren knew but a single Swedish 
male. I believe Mr. Malloch has, also, taken a single male at Bonhill, 
Dumbarton. Haliday’s description is too short to render the synonymy 
certain ; his type came from the Isle of Wight. 
23. alpinus, Zett. 
Bassus alpinus, Zett. 1.L. i. 379, ?. Exochus alpinus, Holmgr. Sv. Ak. Handl. 
1855, p. 311; Ofv. 1873, p. 75, ¢ ; Brisch. Schr. Ges. Konig. 1871, p.99; Thoms. 
Deut. Ent. Zeit. 1887, p. 214, ¢ ?. 
Head posteriorly constricted; face partly pale; frons very finely but 
obviously punctate, with the scrobes not extending to ocelli and orbits 
