NO. 2178. THE GENUS BRACON FABRICIUS— MORRISON. 337 



width at end of head, 22-21.5; profile of face nearly straight or very 

 slightly convex as far as the lateral facial pits, then very sHghtly con- 

 vex to shortly below the eyes, then flat to the apices of the interan- 

 tennal plates ; marginal ridges of the antennal fossae weU developed, 

 less prominent behind the median ocellus; honey-yeUow, one speci- 

 men not marked with darker coloring, the other with blackish-brown 

 diffusion below and behind each eye, this extending forward on the 

 face tin only a narrow light stripe is left, and downward to the base of 

 the mandibles, but with a lighter area above the base of each mandible ; 

 head pale in front of and behind the eyes, the darker coloring reaching 

 the eye margin at the top of the eye and at the lower hinder comer of 

 each ; antemial fossae, vertex, and occiput black, lighter around the 

 edges of the diffusion ; face between antennae brownish ; head sparsely 

 pmictate and clothed with white hairs; antennae black, brown in 

 incompletely colored specimens, more than 24-segmented (broken); 

 eyes dark; oceUi arranged in a triangle, the lateral oceUi slightly 

 nearer the median ocellus than to each other; labrum elongate, pale, 

 honey-yeUow, the thickened margin pale brown in the lighter speci- 

 men and blackish-brown in the darker; mandibles pale, blackish at 

 tips; beak and palpi pale bro\^Ti to blackish brown, the terminal seg- 

 ments of the palpi rather stouter than usual in the lighter (male) 

 specimen, longer and apparently more slender in the darker (female ?) 

 specimen. 



Thorax. — Longer than high, honey-yeUow, venter light or reddish- 

 brown; pronotum with sides shining, almost smooth in the middle, but 

 finely and more densely punctate along the upper and hinder mar- 

 gins; proepisterna pale honey-yellow, varying to dark reddish-brown, 

 the lower ends of the lobes darker in each case; parapsidal furrows 

 prominent, deep, more groove-Uke than usual, not punctured, con- 

 tinued straight backwards and meeting to form an acute angle just 

 before the scutellar fossa; median lobe of mesothorax with a broad 

 and shallow but distinct median gi'oove; lateral lobes flattened; fossa 

 with a rather prominent median ridge, and a second fainter ridge close 

 to it on each side; scutellum typical; mesopleurae sparsely and 

 famtly punctate and hairy, the pleural groove running straight for- 

 ward from the middle of the insertion of the middle coxae, for about 

 a third of the width of the mesopleurae, deep and well defined, but 

 becoming uniformly shallower until it fades out entirely; venter 

 darker, more closely punctate and hairy; metapleurae smooth and 

 shimng, sparsely punctate and hairy; profile of the propodeum almost 

 uniformly roimded to the insertion of the abdomen; the propodeum 

 with six longitudinal keels, the two median well separated, farthest 

 apart a distance of about one-third of their length from the hind 

 margin of the propodeum, gradually converging forward and round- 

 65008°— Proc.N.M.vol.52— 17 22 



