Il6 BRITISH ICHNEUMONS. [Spinolia. 



Jlfangeri differs only in having the wings rather longer and extending to 

 the apex of the basal segment with no stigma, the metathoracic trans- 

 verse costa entire, petiolar spiracles obsolete and the alar band less 

 determinate. 



This species is perhaps somewhat incongruous in the present genus, 

 though evidently closely related thereto by its fasciated wings, rufescent 

 markings and oljsolete areolet ; in any case Catalytus was not a good 

 genus and must fall. 



This is by no means an uncommon insect during the first half of June, 

 and 1 have always taken it by sweeping reeds by the side of rivers at 

 Brandon and Barton Mills, and on one occasion at l^arnby Broad in the 

 middle of August, except once when I found it running on the mud at 

 their roots among Steni and Trogophloei. Bridgman took a single pair of 

 this species in Norfolk at Brundall and Horning Ferry ; these were referable 

 to the variety Mangeri, but this form and the type have occurred to me in 

 about equal numbers at the same time and place, and the alar develop- 

 ment appears extremely unstable in this species. It has also occurred to 

 me in reed refuse at Oulton Broad at the end of July ; Capron once found 

 it in Surrey ; and there are many examples in Chitty's collection. The 

 male appears to be much the rarer sex ; the only one 1 possess was taken 

 by Beaumont at Harting in Sussex, in the middle of September. 



HEMITELES, Gravenhorst. 

 Gr. I. E. ii. (1829), 781. 



Head transverse and not globose ; metathoracic spiracles small and 

 circular ; areolet internally entire and regular, externally wantmg or 

 ot)solete ; metathoracic costae distinct and usually complete. Antennae 

 and legs slender. Scutellum margined only at the base. Basal segment 

 distinctly petiolate. 



A bare mention of Hemiteles as British is made by Stephens in his 

 Illustrations, but no species are instanced as definitely British ; and 

 Desvignes in 1856 brings forward only fourteen of the known fifty-seven 

 Gravenhorstian kinds as indigenous, together with H. papilionis, Curt., of 

 which I know nothing at all ; of these H. palpafor is now referred to 

 Pezomachns and needs confirmation, H. vicinus is synonymized with 

 H. fue/aiiarii(s, and JP. inodestus is considered to be a variety of H. aesf walls. 

 In 1870 Marshall raised the total of our species to forty-seven, but in 1S72 

 it falls, through synonymy, etc., to forty-four, which have been the basis of 

 all subsequent British research, a study of which enabled me, in a paper 

 before the Entomological Society in 1901, to add thirty species. Of these 

 H. hrevlventrts and H. tiiacullpennls are now for the first time transferred 

 to separate genera, H. furcatus considered synonymous with // laevlgaius, 

 Ratz., H. teuebrlcosus omitted as constituting the $ of Atrac/odes veslalls ; 

 H. terierrlmus and H. fragllls (fon/iosus, Desv.), included in Paiiargyrops ; 

 and H. Inlmlcus placed in Cecldoiiomiis. Consequently only thirty-eight 

 of the later-catalogue species stand here nowadays. Tiiis number I have 

 been enabled to augment from various and sometimes obscure sources — 

 mainly owing to the new descriptions of Thomson and Bridgman — to a 

 total of sixty-six true macropterous PPemlteles (a few of which, however, 

 possess dimorphic forms), though even here subsequent observation will 



