THE CANADIAN ENTOMOLOGIST. 



215 



bb. 



Fig. 14. 



the thorax. They are found on the sea-coasts under debris of various 

 sorts, or inland about decaying animal and vegetable matter. A number 

 of the names on the Canadian lists do not appear in the synopsis, having 

 been reduced to synonymy as follows : the name Umhatus gives way to 

 lateralis, flavipes and nigricollis to melanocephalus, while centro- 

 maculatus becomes nigriceps. The figures of the metasternum are copied 

 from Dr. Horn, and illustrate the characters on which the table is based. 

 A. Mesosternal area median only (fig. 14, a). 



b. Thorax with incomplete basal line, elytra 

 with large piceous post-median sutural 



spot (.12 in.) unipunctatus, Linn. 



Thorax without basal line. 



c. Form oval, less convex, head oblique. 



d. Elytra with sharply limited yellowish apical space. 

 Apical spot extending along sides (.10-12 



in.) prcp.textattis, Say. 



Apical spot not extending along sides 



(.08 in.) ocellatus, Say. 



dd. Elytra indefinitely paler at apex. 



Elytra  rufocastaneous, tip paler (.10-. 12 



in.) lateralis, Marsh. 



Elytra piceous, paler at tip, eighth interval biseriately 



punctured (. 10-. 12 in.) ifidistinctus, Horn. 



Elytra piceous, tip paler, eighth interval uniseriately 



punctured (.08-10 in.) analis, Payk. 



Form very short and convex, head vertical. 



Surface opaque (.06 in. ) lugubris, Payk. 



Surface shining (.06 in.) navicularis, Zimm. 



AA. Metasternal area laterally extended (fig. 15, b). 

 e. Thorax entirely black ; no basal line, 

 f Elytra piceous with pale apex, vary- 

 ing to castaneous ; surface distinct- 

 »' — ly punctulate (.10 -.12 



Fig, 15. in.) hcemorrhoidalis, Fabr. 



flf. Elytra reddish, scutellar triangle and humeral stripe piceous. 



Palpi pale, epipleurse piceous (.08. -.10 

 in.) melanocephalus., Linn. 



Palpi with last joint piceous, epipleurae pale (05.-. 08 

 in.) .pygmceus, 111. 



cc. 



