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Long. corp. 11 millim.; long. ovip. 10 millim.

Female—Head, antennæ, and abdomen (including the petiole) black above; head beneath and mouth-parts fulvous; mandibles bidentate and tipped with black; thorax wholly rufous. Front legs: coxæ and base of femora rufous, the rest wanting; middle legs rufous, tarsi and tibiæ above black; hind legs black, a white spot at the end of the coxæ above and the second joint of the trochanters rufous, Abdomen below white, with a row of five long black dashes on each side, the first bifid in front. Ovipositor rufous, partly black towards the extremity; above it are two long and rather stout black set, densely plumose beyond the middle, the apical third of the cilia being white; the extreme tip of the setæ is spatulate and whitish beneath. Wings smoky, the transverse nervures bordered with subhyaline.

Probably allied to B. semiflavus, Brullé.

Long. corp. cum ovip. 15 millim.; ovip. 3 millim.; exp. al. 23 millim.

Female.—Yellow, antennæ and ovipositor black; vertex with a black band covering the ocelli, which is pointed in front and on each side of the frontal ocellus; mesothorax with a large oval black spot on each side, a triangular reddish patch in front, the hinder angle of which is black, and a transverse black patch in front of the raised scutellum; abdomen yellow on the first two segments and shading into light reddish beyond; a large black spot om each side of segments 3-5; the first segment has a slight impression on each side, the five following ones have a deep groove before the extremity; the front of the body is nearly smooth, but the third segment of the abdomen is sparingly, and segments 4-6 heavily, punc-