214 Trans. Acad. Sci. of St. Louis. 



this subtribe, and any statements concerning it are to be taken 

 in a comprehensive sense; it is more constant in relative 

 length and in the approximation of its tip to the apex of the 

 metasternal projection than it is in width, most of the species 

 having the tip acute, but in some, such as smilJii, gracillima, 

 facela and vespertina, of America, it becomes wider and 

 obtuse at tip, and, in the European ye?'ea?^s it is remarkably 

 wide for Tachyusa and obtuse at tip, though fully attaining 

 the metasternum without an intervening isthmus. 



Gnypetella n. gen. 



The very small frail species of this genus recall the more 

 elongate linear forms of Gnyjpeta in general form, but have 

 the middle coxae very approximate, with their acetabula open 

 behind and not closed by a fine beaded edge, the mesosternal 

 process finely acute, free and extending to the middle of the 

 acetabula, where it is separated from the obtuse apex of the 

 short metasternal projection by a very long, narrow, trans- 

 versely convex isthmus, which is not at all depressed but 

 separated from the metasternum by a subobliterated transverse 

 suture, distinguishable principally b}^ differences in sculpture, 

 the isthmus being wholly punctureless and highly polished. 

 The transverse, elevated, posteriorly rounded plate at the 

 anterior limit of the mesosternum, generally so conspicuous 

 in the Tachyusae and Falagriae, is rather less developed here 

 than usual. The eyes are unusually small, anterior and not 

 prominent, the neck less than half as wide as the head, the 

 elytra slightly angulate posteriorly at the sides and the hind 

 tarsi much shorter than the tibiae, though with the basal 

 joint unusually elongate and longer than the next two com- 

 bined. The only two species known thus far may be 

 described as follows : — 



Form slender, parallel, moderately convex, polished, pale brownish-testa- 

 ceous throughout, the abdomen blackish except toward base; punctures 

 of the head and pronotum extremely minute, rather sparse, broadly 

 wanting toward the middle of the former, the elytra more strongly, 

 asperately but not very densely punctured, the abdomen finely, moder- 

 ately sparsely, the basal impressions somewhat coarsely but not very 



