200 BRITISH ICHNEUMONS. [ Smicroplectrus 

SMICROPLECTRUS, Thomson. 
Thoms. O. E. ix. 882; (?) Microplectron, Forst. Verh. pr. Rheinl. 1868, p. 195 
(mec Dahlb. 1857). 
Body very finely punctate and pubescent. Face apically explanate ; 
mandibular teeth of equal length. Flagellum stout and basally attenuate. 
Metathoracic areae complete, with the central determinate and not trans- 
verse. Abdomen clavate, broadly white-banded; first segment basally 
subauriculate, the second not transverse; ventral valvulae of @ vomeri- 
form. Hind tibia with one very minute external calcar. 
Campoplex costulatus, Bridg., does not belong to this genus, as indicated 
by Dalla Torre. 
1. jucundus, Holmgr. 
Exenterus jucundus, Holmgr. Sv. Ak. Handl. 1855, p. 227,¢ ?. Smicroplec- 
trus gucundus, Thoms. O. E, ix. 888,¢ ¢. Cteniscus jucundus, Bridg. Trans. 
Ent. Soc. 1889, p. 434; cf. Tosq. Ann. Soc. Belg. 1890, p. 102. 
A nitidulous species, with short pubescence. Frons glabrous and 
obsoletely punctate; clypeus somewhat convex, and slightly impressed 
before the rounded apex; costulae wanting and apophyses small. Basal 
segment elevated and sulcate, with carinae extending beyond its centre. 
Nervellus intercepted slightly below its centre. 
Black with the mouth, clypeus, face, underside of scape, tegulae, apex 
of scutellum, a pleural line, apical margins of segments in ¢ narrowly, 
in 2 broadly, and the anterior trochanters with apices of coxae, flavous- 
white. Flagellum beneath and the anterior legs flavo-testaceous ; hind 
legs infuscate, with their femora often rufescent. Length, 5 mm. 
This species strongly resembles Exventerus Bohemani, but differs in its 
smaller size, smooth frons, the more elevated and centrally sulcate basal 
segment, black scutellum, etc. 
It is recorded from Lapland and Belgium; and Bridgman, in bringing 
it forward as British (/oc. c/.) on the strength of a single ¢, captured by 
Champion at Aviemore, points out that the scutellum is black. 
2. quinquecinctus, Grav. 
Ichnewmon quinquecinctus, Gr. Mem. Ac. Sc. Torin. 1820, p. 372, ¢. Tryphon 
quinquecinctus, Gr. I. E. ii. 165; Ste. Ill. M. vii. 239: Fonsc. Ann. Soc. Fr. 
1849, p. 219, ¢. Microplectrum quinquecinctus, Pfank. 1906, p.94. Exenterus 
erosus, Holmgr. Sv. Ak. Handl. 1855, p.227; Voll. Pinac. pl. xlii, fig. 5,9. 
Cteniscus erosus, Brisch. Schr. Phys. Ges. Konig. 1871, p. 97; Schr. Nat. Ges. 
Danz. 1878, p. 103, ¢. 
A shining, pubescent and very finely punctate species. Head trans- 
verse and not constricted posteriorly; clypeus apically rounded and 
depressed; frons obsoletely canaliculate. ‘Thorax punctate, with short 
pubescence and distinct notauli; pleurae punctate with the speculum 
smooth; metathorax subrugulose with the areola concave and apophyses 
