Goleopterological Notices, V. 477 



protliorax, the humeri distinct ; discal stria extending to apioal foui'th or 

 fifth. Abdomen, viewed laterally, scarcely as long as the elytra ; basal segment 

 with two straight divergent carinse separated by one-third the discal width and 

 scarcely one-third as long as the segment. Length 1.5 mm. ; width 0.75 mm. 



Rhode Island. 



The description is drawn from a male example which is appa- 

 rently unique. 



BR¥AXIS Leach. 



Those species having the dorsal surface of the abdomen similar 

 in the two sexes, separated^ by Thomson under the name Brachy- 

 gluta, appear to be entirely wanting in the North American fauna, 

 all of our species entering the true genus Bryaxis as limited by 

 Saulcy, Reitter and others. Nisa Csy., is a subgenus, differing 

 from the true Bryaxis in having the medial of the three spongiose 

 pronotal foveas much smaller than the lateral, and all very feebly 

 impressed, in having the trochanters larger — often spinose in the 

 male, — the first dorsal segment entirely devoid of carinae, and the 

 antennal club of the male curiously and intricately modified but 

 with the tergum simple ; the venter is generally broadly and feebly 

 impressed nearly throughout the length in that sex. The following 

 is a distinct and interesting species, with very complex abdominal 

 modifications in the male, from which sex the description is taken : — ■ 



B. labyrlnthea n. sp. — Moderately stout, convex, polished, bright 

 rufo-testaceous throughout; pubescence rather long, coarse and sparse. Head 

 impunctate, with three large spongiose fovese, the surface between the occi- 

 pital fovese and the eye feebly impressed ; eyes large, prominent, not quite 

 attaining the base ; antennae long and slender, all the joints elongate, except 

 eight to ten which increase gradually in size, obtrapezoidal in form, the eighth 

 wider than long. Prothorax very feebly and sparsely punctulate, slightly 

 wider than long, but little wider than the head, the median fovea much 

 smaller, more basal and deeper than the lateral, Ykiry deeply impressed, with 

 a small spongiose area at the bottom. Elytra convex, finely, very sparsely 

 punctulate, nearly as long as wide, almost twice as wide as the prothorax. 

 Abdomen shorter than the elytra, with two large exposed dorsal segments, the 

 first three times as wide as long, with two equally trisecting parallel and very 

 pronounced tumid ridges, gradually increasing in size and prominence from 

 base to apex and each bearing upon its crest one of the fine abdominal carinse, 

 the latter entire and separated by one-third the width, just perceptibly diver- 

 gent ; apex abruptly perpendicular throughout the width, with a porrect 

 setose process at lateral third far below the crest of the corresponding dorsal 

 ridge, and also a small rounded porrect median lobe, bearing at apex two 



