126 NEOTROPICAL PSELAPHIDAE 



Pronotum with lateral foveae lacking entirely, and the median 

 fovea may or may not be present, when present it is minute 

 and punctiform 27 



24 (23). Fourth (last) segment of maxillary palpi briefly and regularly 



ovoidal, very acuminate at apex 25 



Fourth (last) segment of maxillaiy palpi ovoidal, but distinctly 

 sinuate near apex on external face 26 



25 (24). Body short, subglobular with the habitus of Xybaris and 



Scalenarthrus ; each elytron with three basal foveae; ab- 

 domen with the lateral margin very narrow; known only 



from Brazil STROMBOPSIS 



Body elongate, subparallel and flattened; each elytron with 

 either two or three basal foveae; abdomen with the lateral 

 margins normally developed; known only from Chile and 

 Cuba ACHILLIA 



26 (24). Each elytron with two basal foveae RAXYBIS 



Each elytron with either three or four basal foveae 



BRYAXINA 



27 (23). Each elytron with either four minute basal foveae, or four re- 



placing points; median pronotal fovea may be absent or 



present XYBARIDA 



Each elytron with two basal foveae; median pronotal fovea 

 minute and punctiform but always present; habitus of 

 Bryaxina BRAXYDA 



BARADA (Raffray, 1891) 



The exceptionally small maxillary palpi, and absolutely contiguous pos- 

 terior coxae separate this genus from the rest of the tribe. The male sex has 

 sixth visible (seventh normal) stemite in the form of a small knob articulated 

 at the apical margin of the fifth visible sternite. A single species known, erected 

 on a single male (1.45 mm.), and to my knowledge the female has not been 

 discovered. 



mucronata Raffray. 1891. Venezuela. 



EUPSENIUS (LeConte, 1850) 



LeConte (1850, 1863) 



LeConte and Horn (1883) 



Reitter (1883) 



Brendel and Wickham (1890) 



Brendel (1893) 



SCHAUFUSS (1887) 



Raffray (1896, 1904, 1908, 1909, 1911) 



Leng (1920) 



Bowman (1934) 



