BRACHYGLUTINI 145 



with an oblique, flat, oval, sharply-limited surface which is asperate and setose; 

 VII-XI inclusive longer than wide ; VII-X inclusive narrower than sixth ; VIII 

 distinctly shorter than either seventh or ninth; IX, X, and XI progressively 

 wider; IX and X subequal in length; XI slightly wider than sixth and as long 

 as ninth and tenth united, basally truncate and apically subacute. 



Pronotum with disc simple ; a large pubescent lateral subbasal fovea each 

 side, and a minute median nude, punctiform fovea nearer base. 



Scutellum acute — triangular, glabrous, distinct. 



Each elytron with three circular nude, basal foveae — a sutural fovea at 

 origin of entire sutural stria, a median, and a lateral at origin of a well- 

 formed, arcuate discal stria which extends from fovea to far beyond middle to 

 apical fifth. Wings well-developed. 



Abdomen with the usual large first tergite and strongly defined margins ; 

 first tergite with a pair of strong, slightly divergent, straight, basal carinae 

 one-third as long as segment, and separated by nearly one-half of segmental 

 width. Last sternite medianly flattened, the apical margin bisinuate and con- 

 sequently medianly slightly lobed, relatively long. 



Sternal foveae II, III, IV, and VI well-developed and pubescent. 



Metastemum laterally glabrous, medianly broadly concave and densely 

 pubescent. 



Femora moderately inflated, especially the intermediate and posterior 

 pair; intermediate coxae each bearing a thin, triangular laminoid spine at 

 mesial angle; this spine is indistinct due to the surrounding pubescence, but 

 is quite large when dissected out; intermediate tibiae subtruncate apically, this 

 truncature with a minute internal tooth ; posterior tibiae thickened for apical 

 half of length, the mesial face of the thickened area bearing a brush of short, 

 dense, stiff, equal setae. 



Allotype Female. As for holotype save that the antennae are simpler: 

 segment I elongate-cylindrical, dorsally concave; II narrower, ovate; III dis- 

 tinctly narrower and shorter than second, obconical; IV as wide as, and slightly 

 longer than third, subobconical; V and VII distinctly longer than VI and VIII, 

 these last four subequal in width, as wide as fourth; IX-XI progressively 

 wider and longer, forming the club. Secondly, the intermediate coxae are not 

 armed. Thirdly, the last sternite is very different from the male, being simple, 

 very transverse, relatively short, about as long as the two preceding sternites 

 united, with a simple, convex apical margin. 



Described on seven specimens collected by the author at light at night 

 (9:00-10:30 p.m.), on Barro Colorado Island, Gatun Lake, Panama Canal 

 Zone; holotype, allotype, and one paratype male July 7, 1936; one paratype 

 female July 17, 1936; two paratype females July 28, 1936 and one paratype 

 female July 29, 1936. 



This species is not closely related to any member of this group, but is more 

 allied with diversicornis (Sharp) from Guatemala than to the other species. 



biclavata (Reitter). 1882. Colombia. {Bryaxis) 



diversicornis (Sharp). 1887. Guatemala. (Bryaxis) 



