64 CASEY 



granulate laterally, the margin not thickened; elytra subcostate, 

 the intervals coarsely punctured and with small, smooth and 

 rounded tubercles; inflexed sides densely and coarsely punctured. 

 Length 16.5 mm. ; width 10. o mm. Lower California. 



costatus Horn 



Costatns is unknown to me and the description here given is 

 essentially a copy of the original ; it occurs in the same locality 

 as erostis. The single male specimen representing the latter 

 species in my cabinet and described above has not been com- 

 pared with the original type, but appears to be an authentic 



example. 



Eusattodes n. gen. 



The chief distinctive character of this genus seems to be the 

 abruptly and basally dilated epipleurae, the latter at base extend- 

 ing laterally to the sides of the body, as in the preceding genera, 

 but here combined with rounded Etisatttis-X\\i^ sides of the elytra 

 in section, without trace of the acute margin there prevailing. 

 It also differs from all except Eusatttis seciitus in the completely 

 impunctate integuments and probably in several other charac- 

 ters, which must remain unknown to me for the present, in the 

 absence of typical examples. The t3^pe and only described 

 species is the following : — 



Body oval, convex, black, subopaque above and beneath, less rounded 

 in outline than in Discodemus, with the sides of the elytra almost 

 straight from the base to beyond the middle and nearly parallel ; 

 upper surface entirel}' without sculpture; elytra slightly inflated 

 posteriorly, impunctate, suddenly declivous at the sides; thoracic 

 angles posteriorly produced, the anterior tibiiE obliquely prolonged 

 at the outer angle, which is rounded at the tip. Length 14.0 mm. ; 

 width S.o mm. Lower California (Cape San Lucas). 



laevis Lee. 



According to Horn the prosternum is not margined in Icevis 

 and the tip of the process is rounded and smooth. 



Eusattus Lee. 



This is a large genus, embracing considerable variety in the 

 form and sculpture of the body, but the epipleurce throughout 

 are virtually constant in extent and configuration, this being one 

 of the strongest of the reasons inducing me to believe that these 

 radical epipleural modifications must be given full generic weight 



