DYNASTIN.E 185 



more oval form, larger and more prominent eyes and less transverse 

 prothorax. There does not appear to be much doubt concerning 

 the status of our more northern species as defined in the table. 



Group II. 

 Subgenus Euligyrus nov. 



The species of this division have a distinctly different habitus from 

 those of the preceding subgenus, due to their more oval and rather 

 less convex form, notably large head, with widely separated clypeal 

 teeth, purely tridentate anterior tibiae, presence of an anterior 

 fovea and tubercle on the pronotum and finer elytral sculpture; 

 when, in addition, we consider the bidentate mandibles, which 

 however reappear in Euetheola and the subgenus Eugrylius of 

 Ligyrus, the taxonomic isolation of Euligyrus becomes still more 

 evident. The mentum is smooth, feebly convex, rather broadly 

 truncate at tip and has, along each side, a series of very stiff erect 

 setae. The under surface is completely glabrous and the meta- 

 sternum has only a few widely dispersed punctures toward the sides, 

 becoming closer anteriorly. One of the most radical peculiarities 

 of the subgenus is, however, the structure of the met-episterna, 

 almost the entire inner half being very smooth, sculptureless and 

 more internally sloping, a character not even suggested in Ligyrodes. 

 The apex of the post-coxal prosternal process is large, nearly flat 

 and glabrous, divided, as in Ligyrodes, into a posterior cilia-bearing 

 part and a larger, convex, nude anterior part. The type species 

 is the following: 



Form broadly oval, shining black, the elytra, under surface and legs with 

 more or less evident piceous tinge, glabrous throughout, excepting 

 the rows of setae on the abdomen and legs; head half as wide as the 

 prothorax, with fine separated wavy rugulosity, smooth at base, the 

 front concave medially, the transversely placed tubercles widely 

 separated, each gradually sloping externally; clypeus trapezoidal, 

 with straight and finely, evenly elevated sides, the apex truncate, 

 with rather rounded angles, each bearing an obtuse erect tooth, 

 and about half as wide as the base; eyes moderate, not prominent, 

 prothorax barely more than one-half wider than long, the sides evenly 

 but moderately converging and evenly, rather strongly arcuate 

 from the well rounded basal angles to the apex and rather finely 

 margined; base broadly sinuate at each side, immarginate through- 

 out; surface convex, more declivous laterally, sparsely, very minutely 

 punctate, less minutely toward the sides; scutellum moderate, 



