BEACON. 321 



black colour, however, not reaching the base. Petiole almost perpendicular, its apex 

 reaching above the thorax ; hollowed in the centre, the centre bicarinate, the sides 

 separated from the central keel by deep depressions. Abdomen scarcely so long as the 

 head and thorax united, at the base somewhat broader than the thorax, and becoming 

 gradually narrower to the apex, which is rounded; the sides and ventral surface 

 sparsely clothed with white hair. Legs stout ; the coxae covered with longish white 

 hair ; the tibiae and tarsi densely pilose. Wings longish, narrow ; the nervures and 

 stigma dull black ; the second cubital cellule on both sides (but especially on the 

 upper) shorter than the third. 



X 14. Bracon sedulus. (Tab. XIII. fig. 14.) 



< Niger ; abdominis segmentis l°-6 m rufis, articulatione suturiformi recta ; terebra quam abdomen breviore ; 

 alis fuscescentibus. $ . 

 Long. 9 millim. ; terebra 4*5 millim. 



Hab. Nicaragua, Chontales (Janson). 



Antenna? as long as the body, tapering towards the apex ; the third and fourth joints 

 shorter than the basal one, and subequal. Face densely covered with long white hair ; 

 shining, impunctate, transverse ; clypeus not projecting, and not separated from the face 

 by a groove. Front but slightly excavated ; a broad, but not long, furrow leads down 

 into it from the ocelli, which are raised. Thorax shining, impunctate ; mesonotal 

 sutures deep ; prothorax with a deep furrow on the side ; metathorax densely covered 

 with long white hair, gradually sloping to the apex. Abdomen longer than the 

 head and thorax together ; broader in the middle than the mesothorax, and becoming 

 compressed laterally towards the apex. The petiole is raised in the centre, this raised 

 central part being bounded by straight furrows. The suturiform articulation is almost 

 transverse, narrow, and shallow. 



Differs from B. morrisoni in having the thorax entirely black, and the abdomen not 

 entirely red, the second cubital cellule nearly as long as the third, the abdomen longer 

 compared to the head and thorax, and the eyes shorter and not reaching quite so near 

 to the mandibles. B. excelsus may be known from B. sedulus by its smaller size, the 

 darker wings, the shorter second cubital cellule, the abdomen shorter and not entirely 

 red, the ovipositor shorter, &c. 



15. Bracon excelsus, 



Niger ; abdomine rufo, articulatione suturiformi recta ; terebra quam abdomen fere breviore ; alis fuliginosis. $ . 

 Long. 7 millim. ; terebra 2 millim. 



Hab. Mexico, Presidio (Forrer). 



Antenna? with the pedicel of the scape longish, half the length of the first joint ; the 

 first joint globular, not produced at the apex, and about three times longer than 

 the second ; the third and fourth joints subequal. Face almost transverse, scarcely 



biol. centr.-amer., Hymenopt., October 1886. 2 tt 



