1002 REPORT OF THE HARVARD AFRICAN EXPEDITION 
ANEUROBRACON, A REMARKABLE NEW GENUS 
OF BRACONIDAE FROM LIBERIA 
By Cuarures T. Bruss 
. In the extensive collection of Hymenoptera collected by Prof. Bequaert in 
Liberia, there is a single specimen of a very strange braconid. I was at first 
uncertain as to the affinities of this insect, but a closer examination shows that 
it evidently belongs to the subfamily Agathidinae (or Braconinae of some recent 
writers) where it must form the type of a new genus. 
The most striking peculiarities of this form consist in the almost complete 
loss of the venation of the wings, although these organs are of full size and evi- 
dently suffice for active flight, and in an extreme lengthening of the hind legs. 
These are so long that they measure fully twice the length of the body, due to 
an excessive elongation of all of the segments, including the coxae and tro- 
chanters. 
Many other genera in this subfamily have the hind legs very long, but I 
have seen nothing approaching the remarkable form of this species. There is 
also in some other genera a tendency for the second cubital cell and certain 
other wing veins to become atrophied, but again, no genera have been described 
with such an almost complete loss of venation. 
Following is a description of the genus and its type species. 
Aneurobracon, new genus 
Body rather long and slender, the general proportions much as in Macrocentrus. Head trans- 
verse, the face convex and receding below; occiput without a marginal line, strongly concave; an- 
tennae slender, with 26 joints, inserted high up on the head, nearly twice as far from the margin of 
the clypeus as from the vertex; eyes large; ocelli in a triangle on the somewhat concave front; 
maxillary palpi five-jointed, stout, but with only the second joint slightly swollen. Mesonotum 
with the notauli weakly impressed anteriorly, merging into a large shallow median impression and 
not indicated behind; scutellum sub-triangular, separated by a curved groove at base. Propodeum 
long, its upper surface but little depressed behind when seen in profile; without areas or carinae 
above but with a complete lateral carina behind the small circular spiracle. Abdomen sessile, 
the first segment fully half as wide as the apex of the second segment, somewhat more than twice 
as long as wide at tip; second and third segments quadrate, without transverse grooves or impres- 
sions; following segments of softer consistency, the tip pointed; the whole abdomen about as 
long as the head and thorax together. Fore and middle legs rather slender, of the usual size; hind 
legs enormously lengthened, nearly twice as long as the entire body, the coxae, trochanters and 
tarsi especially lengthened. Ovipositor exserted, about as long as the abdomen. Wings long and 
narrow, with a large, lanceolate stigma, but almost without venation. Basal vein and nervulus 
weakly indicated and also the anal, although the submedian is entirely absent; radial vein present 
only as a very short first section, perpendicular to the stigma at the basal fourth of the latter. 
Hind wing with a single, narrow basal cell closed by a very delicate, but distinct vein. 
Type: A. bequaert: sp. nov. 
Aneurobracon bequaerti, new species 
Text Fig. No. 9 
Length 2.5 mm.; hind leg 5.0 mm. Black, the second segment of the abdomen and the bases 
of the following segments reddish brown; fore and middle legs brownish; wings hyaline, the 
