268 c. A. L. SMITS VAN BURGST, TUNESIAN ICHNEUMONIDAE. 
petiole a little longer than broad, slightly rounded laterally ; 
segment 2 much longer than broad, 3 quadrate; all segments 
but basal one finely punctate, pretty shining. Terebra almost 
as long as abdomen. Length 10 mm. 
Head and thorax black; internal orbits centrally flavous, 
a flavous dot on vertex; cribrary parts fuscous; antennae 
tricolor: the lower half badious, the apical rufescent, centrally 
white-banded; scutellum laterally somewhat flavous and the 
lateral carinae of its basal fovea lined with white; tegulae 
fuscous. Coxae and trochanters blackish-red, femora reddish- 
yellow, tibiae and tarsi darker. Abdomen reddish-yellow, darker 
ventrally; segment 2 with black marking apically. Pterostigma 
piceous. 
One 9 captured env. of Tunis (Belvedere) in April by 
sweeping. 
Description of Mesostenus subelongatus nov. spec. 9. This 
species is so closely allied to the preceding, as to require no 
detailed description. Therefrom it differs in the more closely 
puncturation of its seutellum, in the distinctly longer abscissula 
of the hind wing and the nervellus being broken nearer to 
its centre. Turther in its still more smooth and shining petiole 
and the absence of the circular depressions (fovea) between 
the spiracles, in the subelongate abdomen, the second segment 
being shorter, and the third being broader than long. Besides 
subelongatus is more shining than tricolor and its terebra 
somewhat shorter. Length 8 mm. 
Head totally black. Antennae black, centrally white-banded. 
Thorax black; scutellum black, only its basal fovea laterally 
lined with white. Pterostigma black. Coxae and trochanters 
black, femora reddish; anterior and intermediate tibiae and 
all tarsi fuscous; hind tibiae black. Abdomen reddish-black; 
base of 15 segment black. 
I captured one © near Tunis (Belvédère) in April by sweeping. 
