Erromenus | BRITISH ICHNEUMONS. 305 

deeply sulcate. Scutellum a little convex and apically broadly rounded. 
Abdomen sessile and convex, with the anus obtuse; terebra short, stout, 
curved and apically acuminate. Legs somewhat short and distinctly 
stout, with the femora and calcaria incrassate ; hind tarsi not incrassate, 
their claws somewhat obsoletely pectinate. Wings with areolet nearly 
always present, oblique and irregular; basal nervure subvertical and 
slightly arcuate. 
This genus may be known by the short legs with stout femora and cal- 
caria, sublunate terebra, elongate costella and subvertical basal nervure. 
Its species, which occur in woods and fields, oviposit in Hymenopterous 
larvae. In their stout legs, basally pale tibiae and more or less pro- 
tuberant face they approach the /wochides, though the structure or the 
head above the scrobes is quite distinct. The genus Z7richocalymma, 
Forst., has been used by Woldstedt for such species of the present genus 
as possess no areolet; but it is impossible to erect such a division, since 
some vary from the possession of well developed areolet to its utter lack ; 
Thomson, on the other hand, has used Forster’s name for a division of 
Polyblastus. The species, with the exception of the first, are so similar in 
structure that they are difficult to tabulate, except upon the unsatisfactory 
basis of colour, and I anticipate further synonymy; thus both 2. plebeyus 
and Z. anal’s may be no more than colour varieties of 2. drunnicans, as 
possibly may also be £. zonarius, since the puncturation of the basal seg- 
ment is hardly more than fuller developement. Thomson founds his 
division on the tomentose or nude clypeal foveae, an obscure and some- 
what fugitive point. 
Table of Species. 
(2). 1. Legs entirely red; scutellum very 
strongly convex... id .. I, CALCATOR, AZuZ. 
(1). 2. Legs not entirely red; scutellum not 
very strongly convex. 
(4). 3. Areolet wanting; carinae of basal 
segment extending nearly to apex 2. PLEBEJUS, Wold. 
(3). 4. Areolet subentire; carinae of basal 
segment shorter. 
(12). 5. Hind femora entirely rufescent. 
(9). 6. Abdomen broadly red. 
(8). 7. Basal segment sparsely punctate and 
alone black .. ue 7 .. 3. BRUNNICANS, Grav. 
(7). 8. Basal segments strongly punctate, 
the central alone red : 
(6). g. Abdomen black, with at most in- 
cisures pale. 
(11). 10. Basal segment rugulose, with carinae 
nearly reaching apex a - 
(10). 11. Basal segment subglabrous, with 
carinae only to centre oe .. 6. FRENATOR, Grav. 
(5). 12. Hind femora partly black. 
(14). 13. Hind femora centrally black; anus 
4. ZONARIUS, Grav. 
5. PUNCTULATUS, Ho/mgr. 
_Yufescent .. ie sas .. 7. ANALIS, Brisch. 
(13). 14. Hind femora apically black ; central 
segments rufescent - .. 8. FASCIATUS, Grav. 
