io6 MEMOIRS ON THE COLEOPTERA. 



latter short and strongly transverse, the suture only just visibly longer than 

 the prothorax, rather broadly impressed except apically; abdomen parallel 

 and straight at the sides, not narrowed apically, narrower than the elytra, 

 finely, somewhat closely punctulate almost throughout; basal joint of the hind 

 tarsi much shorter than the second. Length 1.9 mm.; width 0.55 mm. 

 Kansas (Onaga), Warren Knaus. 



Evidently congeneric with novella but differing in the much larger 

 head and prothorax, shorter elytra and still longer antennee; these 

 species must be at least subgenerically separated from Dimetrota at 

 some time in the future. 



Dalotia n. subgen. 



In this subgenus of Dimetrota, the hypomera are similarly hori- 

 zontal and warped and the middle coxse are rather widely separated, 

 the mesosternal process broad and circularly rounded at tip, ex- 

 tending nearly to apical third of the coxae and but slightly removed 

 from the unusually elongate and apically rounded metasternum. 

 The hind tarsi are rather slender, with the first four joints equal. 



Dimetrota (Dalotia) pectorina n. sp. Stout, subparallel, slightly convex, 

 somewhat shining, the micro-reticulation rather feeble, finely transverse 

 in wavy lines on the abdomen, the punctures minute, not close though close- 

 set and asperulate on the elytra; color piceous, the elytra but little paler, 

 the head and abdomen black; head small, orbicular, but little wider than 

 long, the eyes moderate, at nearly their own length from the base, the tempora 

 arcuately converging behind them, the base rounded, the neck slender, less 

 than a third as wide as the head, the carinse fine, not quite entire; antennae 

 rather short, very stout and somewhat strongly incrassate, the second joint 

 but little longer than the third, which is one-half longer than wide, evenly 

 and feebly obconic and not constricted at base, the outer joints rather strongly 

 transverse, compact, the last as long as the two preceding ; prothorax fully 

 one-half wider than long, nearly as wide as the elytra and very much wider 

 than the head, parallel, with somewhat strongly arcuate sides and truncate 

 apex, the median line rather broadly impressed, gradually more strongly 

 from before the middle to the base ; elytra moderately transverse, the suture 

 a third longer than the prothorax, the apices not sinuate; abdomen rather 

 short and broad but narrower than the elytra, parallel, with very feebly 

 arcuate sides, the first five tergites equal, the sixth (cf) truncate at tip, 

 with a small rounded flattened tooth at each side, separated from the broad 

 medial truncature by a small deep sinus and with a minute sinus at the middle 

 of the truncature, flanked at each side by a very minute obtuse^ tooth. 

 Length 1.9 mm.; width 0.5 mm. California (Sta. Cruz Mts.). 



Recognizable by the small and basally rounded head, rather short, 

 thick antenna? and unusually complex male sexual characters. 



