190 Trans. Acad. iSci. of St. Louis. 



the abdomen toward base still paler and rufo-testaceous ; head 

 orbicular, rather shining, finely, somewhat closely punctured, feebly, 

 impressed along the middle; antennae with the first three joints 

 elongate and subequal in length; prothorax as long as wide, not 

 quite as wide as the head, opaque, the punctures coarser than those 

 of the head and closely crowded; sides at apical third prominently 

 subangulate, thence moderately converging and feebly sinuate to the 

 broadly arcuate base; disk very feebly impressed along the median 

 line except toward apex; elytra large, wider than long, four-fifths 

 wider and nearly a third longer than the prothorax, highly polished, 

 submetallic in lustre, very minutely, evenly and not very closely 

 punctulate; abdomen finely, rather sparsely punctulate, coarsely 

 and densely punctured in the depressions, the surface posteriorly 

 more closely and somewhat more strongly punctulate; sixth ventral 

 feebly sinuato-truncate at tip in the male, rounded in the female. 

 Length 2.8 mm.; width 0.72 mm. South Africa (Wellington). 



capensis n. sp. 



The abdomen, though as highly polished as the elytra, is 

 less metallic in lustre ; it is less elongate and stouter than 

 in Tachyusa and only feebly narrowed toward base. The 

 pubescence throughout is very short and inconspicuous. 



Tracbyota n. gen. 



The type of this genus is a singularly isolated species 

 described by LeConte under the name Falagria cavipennis. 

 Its narrow head and prothorax, when contrasted with the 

 hind body, long antennae, wide but very short, concave 

 elytra, having peculiarly coarse rough punctures and ele- 

 vated side margins, with the unusually full abdomen, are 

 features imparting a facies wholly different from that of 

 any other genus of the Tachyusae. Besides this type a sec- 

 ond species was discovered several years ago by Mr. H. C. 

 Fall, which it gives pleasure to make known at the present 

 opportunity. The two species may be distinguished as 

 follows : — 



Form moderately slender, shining, subglabrous, the head and abdomen 

 black; prothorax blackish-piceous, the elytra paler, piceo-testaceous; 

 legs and antennae pale, the latter infuscate toward tip; head and 

 pronotum very finely, remotely and subasperately punctulate; 

 elytra coarsely, not densely, evenly punctured, the punctures very 

 strongly asperate; abdomen extremely finely and remotely punctu- 



