468 COLEOPTERA OF NORTH AMERICA. 



Presternum not emarginate beneath ; front coxae contiguous, 

 middle ones slightly separated, metasternuni short, side pieces 

 narrow, hind coxai rather large, oval, widely separated, extend- 

 ing to the elytral margin. Thighs stout, unarmed. Ventral seg- 

 ments unequal; third and fourth united equal to the second or 

 fifth; sutures straight, the first obliterated at the middle. 



The above characters are drawn from Emphyastes. The 

 Australian genus Aphela only differs by the legs being less stout; 

 the tibi^ less expanded or thickened towards the tip, and by the 

 beak not being grooved. 



Emphyastes fucicola is found on the Pacific sea-coast from 

 Alaska to San Diego. 



Tribe III.— HIXOBIIIVI. 



The mandibles in this tribe have two apical teeth, of which the 

 lower one is a little shorter; there is besides a cusp on the inner 

 edge, so that they become three-toothed. This normal form is 

 preserved through many of the following tribes, modified only by 

 the greater development of the inferior edge and cusp, which by 

 assuming more prominence gives finally an oblique form to the 

 mandible. The gular peduncle is longer than wide, a little wider 

 in front, truncate anteriorly; the mentum is transverse, not large, 

 and the palpi are rather more developed than in the following 

 tribes. The beak is rather long, not slender, except in Pissodes, 

 and the antenna! grooves do not extend to the tip. Eyes 

 transverse. The antennie are geniculate ; scape long, funiculus 

 7-jointed, club oval, pointed, annulated, entirely pubescent and 

 sensitive, except in Pissodes, where the first joint is smooth and 

 subglabrous. 



The front coxse are contiguous and the cavities confluent, except 

 in Pissodes, where they are slightly separated. The middle coxae 

 are not widely separated ; the side pieces of metasternuni diago- 

 nally divided, with the epimera triangular, not attaining largely 

 the base of the prothorax. Side pieces of metasternuni narrow, 

 slightly dilated in front. Hind coxce widely separated, attaining 

 the lateral margin, or nearly so. 



Ventral segments unequal, first, second, and fifth longer; 

 sutures straight and deeply impressed, except the first which is 

 finer and sometimes slightly sinuate. Pygidium covered by 

 elytra. 



