BYRRHID/E 53 



considered. These genera, named Cyphonichus and Euthryptus, 

 both have fragile antennae of aberrant structure but do not seem 

 to have the transverse pronotal series of the first two genera, and 

 also lose most of the peculiar facies of the Limnichini. I am com- 

 pelled to pass over them at present, no examples being at hand. 



Limnichoderus Csy. 



Limnichus (subgen. Limnichodems Csy.), olim. 

 The diminutive species of this genus, together with Limnichus, 

 which is the principal European genus of the tribe and including 

 numerous species of slightly greater average size, form a very dis- 

 tinctly defined group of the Limnichini, distinguished by the struc- 

 ture of the sides and base of the head, coarse epistomal suture and 

 dual vestiture of very short dense appressed hairs, with longer sparse 

 erect hairs interspersed, as before noted. The scutellum is of 

 rather small size, generally slightly longer than wide and of tri- 

 angular form. The other characters, including the crural exca- 

 vations, are those of the tribe, without any striking modifications so 

 far as noticed. Our species, some eight in number, may be defined 

 as follows: 



Abdomen without trace of scattered punctures, finely, uniformly and 

 densely chagrined and dull in lustre. Form oval, convex, somewhat 

 rapidly and not very acutely acuminate behind, the minute punc- 

 tures bearing the very short hairs dense throughout, castaneous 

 in color, paler beneath, sometimes blackish above, the vestiture 

 pale brown, variegated slightly on the elytra with two or three 

 silvery spots, apparently caused to some degree by the different 

 angle of reflected light due to the changing direction of the hairs; 

 head convex, the lateral depression behind the antennae deep and 

 with longer whitish hair; prothorax very short, the converging sides 

 nearly straight, unimpressed, the sculpture not stronger laterally, 

 the basal lobe distinct; elytra about a fourth longer than wide, 

 widest near basal third, the sides rounded, converging gradually 

 behind, the apex narrowly, subacutely and feebly lobed, the surface 

 convex at base to the level of the pronotum, having, in addition 

 to the minute ground sculpture, a few scattered perforate punctures 

 of moderate size. Length 1.4-1.5 mm.; width 0.7-0.78 mm. Cen- 

 tral Texas to southern California. [Limnichus (Limnichoderus) 

 naviculatus Csy., Ann. N. Y. Acad., 1890, p. 156]. . .naviculatus Csy. 



Abdomen finely, densely and evenly sculptured and more or less dull, 

 but having in addition a few scattered perforate punctures of 

 moderate size 2 



Abdomen with minute dense sculpture and dull lustre as in the preceding, 



