276 BKAGHELYTRA — STAPHYLINIDAE. 



impressions on thorax placed nearer to the anterior margin 

 than to the hinder pair. Rather common. 



0. punctipcnnis, Lac. 



b. Elytra distinctly shorter than thorax. 



I. Thorax reddish-yellow ; elytra yellow-brown. 



Head black ; abdomen pitch-black ; antennae and legs 

 reddish-yellow. Middle pair of impressions on thorax 

 placed nearer to the anterior margin than to the hinder 

 pair. Common. 0. mela7ioccphalus, Gr. 



II, Thorax pitch-black ; elytra dirty brown. 



Head and abdomen pitch-black, apex of latter dirty 

 brown ; antennae and legs yellow-brown. Middle pair of 

 impressions on thorax placed about as far from anterior 

 margin as from hinder pair. Common. 



0. myrmccoiihilus, Kies. 



rABnBBIDAE. 



A, Fourth joint of hinder tarsi simple. 



a. Second joint of hinder tarsi longer than first. 



I. Fifth joint of hinder tarsi not so long as the first 

 four together. 



Labrum short, bilobed ; maxillary palpi with third joint 

 rather longer than second, fourth small and narrow, gradu- 

 ally pointed ; ligula bilobed, paraglossae not much longer 

 than ligula; first joint of labial palpi reaching to about 

 base of ligula, second longer, cylindrical, third about as 

 long as first, much narrower than second. Legs short and 

 powerful ; anterior tarsi with first four joints forming an 

 almost roundish plate. Lathrolium, Gr. 



II. Fifth joint of hinder tarsi as long as the first 

 four together. 



Labrum rather narrow, bilobed ; maxillary palpi with 

 third joint rather longer than second, fourth not much 

 narrower at base than third, narrowed toward front, trun- 

 cate at apex ; ligula bilobed, paraglossae longer than ligula ; 

 labial palpi as in Latlirobmm. Achenium, Leach. 



h. First joint of hinder tarsi longer than second. 



I, Antennae elbowed. 



