June i 9 oo.] Casey: On North American Coleoptera. 81 



Telmatophilini. 



In this tribe the body is elongate-oval and convex, with slender an- 

 tennae, moderate in length and having a narrow loose 3 -jointed club, 

 with the ninth joint notably smaller than the tenth in Telmatophilus 

 and Loberus f and subequal to the latter in Tomarus. The basal seg- 

 ment of the abdomen is only moderately elongate, and the elytral 

 suture is margined. The pronotum has two small deep and widely 

 separated isolated foveas at the basal margin. The abdominal segments 

 are perfectly mobile as in Cryptophagini, and the fourth tarsal joint 

 is very small. The three genera differ considerably among themselves 

 in general habitus and may be defined as follows : — 



Elytra not margined at base, feebly margined along the suture, the surface pubescent 

 and closely and irregularly punctured ; prosternal process acute at tip ; eyes well 

 developed and coarsely faceted ; tarsi thick and strongly lobed and pubescent 

 beneath, the basal joint of the posterior not much longer than the second, the 

 claws thick and strongly arcuate but not obviously dentate ; abdominal sutures 

 flexed abruptly backward at the extreme sides, the first segment as long as the 

 next two combined or longer ; pronotum having a very fine excavated line along 

 the marginal basal bead throughout the width Telmatophilus 



Elytra with a thickened basal marginal bead, along which there are several small 

 deep foveas in Tomarus, the suture finely and more or less strongly margined 

 throughout ; prosternal process truncate at tip ; abdominal sutures straight 

 throughout, the basal segment shorter ; body sparsely and feebly pubescent to 

 glabrous 2 



2 — Pronotum broadly but feebly impressed at base between the foveas, the elytra 

 evenly striato-punctate ; eyes large, convex and very coarsely faceted ; tarsi 

 thicker, strongly lobed, the basal joint of the posterior but little longer than the 

 second, the claws dentate within at base ; first abdominal segment without diverg- 

 ing lines ; segments one to four decreasing gradually and but slightly in length. 



Loberus 



Pronotum not impressed at base, the elytral punctures sparse and irregular in dis- 

 tribution ; eyes rather small and not very coarsely faceted ; tarsi very slender, 

 feebly lobed and only on the third joint, the first joint of the posterior nearly as 

 long as the next three combined, the claws very slender, arcuate and perfectly 

 simple ; first abdominal segment with two very widely diverging arcuate lines, 

 homologous with the straight and less diverging lines of Biphyllini and Cryp- 

 tophilini Tomarus 



No representative has as yet been discovered in the Pacific coast 

 fauna, but the tribe is much better developed in America than in 

 Europe. Cryptophilus, which is placed near Telmatophilus by Reitter, 

 is entirely out of place, the completely closed anterior coxal cavities 

 betraying a greater affinity with Diploccelus. 



