486 Mr. P. Cameron on 
than broad. Areolet 5-angled, narrowed above; the trans- 
verse basal nervure is interstitial. Scutellum flat. Median 
segment not completely areolated; it is longish, its apex has 
an Y abrupt oblique slope ; spiracles long, curved, rounded at 
the top and bottom. Legs short, stout; the hinder coxa 
large, roundly produced backward ; the tarsi spinose; the 
middle joints on the front pair narrowed at the base; the 
basal joint incised at the base; the apex of the tibiae spinose ; 
the claws are large, curved, bare. Abdomen with seven 
segments, its apex bluntly pointed; the last segment well 
dev eloped all round; the ventral fold reaches to the base of 
the ovipositor; the cenchri are stout. 
The median segment is less distinctly areolated than in the 
Ichneumonini 5 the hinder cox project backward more than 
usual ; there 1 is a short nervure on the cubital nervure, as in 
Ichneumon, and another on the outer side of the recurrent 
nervure, this latter being a somewhat uncommon feature. 
‘lhe median segment is also rather more elongated than 
usual. The mandibles, when they touch at their apices, 
leave an open space between themand the labrum, as in the 
division Cyclostomi of the Braconide; the apices of joints 
1-4 of the tarsi bear long stout spines. The thorax, com- 
pared with the abdomen, is rather longer than usual ; the apex 
of the hinder femora reaches to the end of the fourth abdo- 
minal segment. There can hardly be said to be teeth on the 
median secment, but the lateral keels are dilated on the top 
of the apical slope. Gastroceeli indistinct. 
This genus does not fit into any of the tribes as defined by 
Foerster and Ashmead. The edentate mandibles might 
place it with the Heresiarchini, but in that group they are 
acute at the apex, not bioad and blunt as in this genus, 
‘The mandibles are so different from anything hitherto known, 
and form such a distinctive mark, that the genus might well 
form the type of a new tribe, w hich is readily separated from 
all others by the short, curved, broad, edentate, and (at the 
apex) broadly rounded mandibles, which are also broadly 
hollowed at the base on the outer side. The eyes are small 
and appear more widely separated from the base of the 
mandibles than usual. ‘The antenne are thicker than in the 
Ichneumonini. ‘The bluntly pointed apex of the abdomen, 
with the well-developed last segment and ventral fold, refer 
it to the division Amblypygi. The sheaths of the ovipositor 
project largely. 
Gyrodonta flluvomaculata, sp. n. 
Rufa, flavo-maculata, abdominis apice nigro; pedibus rufis, coxis 
