
Mesoleptus | BRITISH ICHNEUMONS. 221 
with their apices not darker; hind femora slender. Wings subhyaline 
with stigma fulvous; areolet triangular, shortly but distinctly petiolate ; 
fenestrae linearly discreted ; nervellus intercepted at its centre. Length, 
g—12z mm. 
Very like the next species, with which it has hitherto been mixed in 
Britain, but distinctly smaller and more slender with no metathoracic 
nor petiolar carinae, the stigma paler and postpetiole not margined. 
Pfankuch tells us that the typical 9, together with varr. 1 and 4 of 
Gravenhorst’s Mesoleplus typhae are lost, and that the typical ¢ is 
Kriechbaumer’s H. zmsignis, which I have no doubt is synonymous with 
H. villosulus, Thoms. Subsequent authors have rendered the synonymy 
inextricable. 
The present is our common British species and very probably that 
recorded in all our Lists and Catalogues. Lastingham (Marshall) and 
Acomb Wood, in Yorkshire (Wilson) ; common in Norfolk (Bridgman) ; 
Guestling (Bloomfield) ; Wimbledon (W. Saunders); near Hereford in 
July (Yerbury) ; Felden (Piffard); a full series from Shere (Capron) ; 
Lyndhurst in June (Adams); Tostock early in June (Tuck). I have 
taken it in the Bentley Woods near Ipswich towards the end of May, at 
the flowers of the wild blue hyacinth and hovering low over herbage; and 
swept it in the middle of June in marshy parts of Tuddenham Fen, 
Suffolk, and Burwell Fen, Cambs. 
5. villosulus, Thoms. 
Mesoleptus typhae, Gr. I. E. ii. 62, excll. ¢ et varr. (nec Fourc.). Hadrodac- 
tylus villosulus, Thoms. O. E. ix. 919 et xix. 1978, ¢ @. H. insignis, Kriech. 
Ent. Nachr. 1891, p.141, ¢. 
A distinctly stout species. Head not at all constricted posteriorly ; 
face and mouth flavous, sometimes with the former black-lined; clypeus 
coarsely punctate and hardly discreted from the densely punctate face. 
Antennae filiform and hardly shorter than body, coloured as in the last 
