56 CASEY 



2 — Epipleurae very wide, occupying the entire inflexed sides of the 



elytra ; intercoxal process of the abdomen acute ; antennae slender, 

 dilated moderately toward apex. Habitat insular. [Type Eu- 

 sattus robustus Lee] Nesostes ^? 



Epipleurae narrow, occupying much less than the entire inflexed sides 

 of the elytra, except sometimes at the immediate base 3 



3 — Epipleurae abruptly dilated at base to the lateral limits of the 



elytra ; intercoxal process of the abdomen acute ; body oblong or 



oblong-oval, moderately convex 4 



Epipleurae gradually becoming wider basally, sometimes extend- 

 ing to the sides of the elytra at base ; sides of the elytra always 

 obtusely rounded in section, never acutely margined ; antennae 

 slender, dilated apically, the joints loose and obtriangular to sub- 

 cylindric 7 



4 — Sides of the elytra acute and refiexed almost to the apex ; elytra 



conspicuously sculptured 5 



Sides obtusely rounded in section as in Eusattus 6 



5 — Antennae less slender, compressed, more glabrous and more com- 

 pact, gradually and more feebly enlarged distally, the joints ob- 

 trapezoidal, the subapical transverse, the eleventh narrower than 

 the tenth ; tarsi long and slender ; femora and propleurte gla- 

 brous. Habitat Sonoran of the Lower Rocky Mountains. [Type 

 Zophosis reticulata Say] Discodemus "y \ 



Antennae slender, the joints obtriangular, gradually wider distally, the 

 last joint as wide as the tenth and longer ; tarsi shorter and stout ; 

 femora and propleurae with bristling hairs. Habitat Lower Cali- 

 fornia. \yy^Q Eusattus erosus Horn] Megasattus '-'>' 



6 — Elytra without coarse sculpture or punctuation of any kind, sub- 

 opaque. Habitat Lower California. \^y-^t. Eusattus lcevis\-jQz.~\. 



Eusattodes 



7 — Intercoxal process of the abdomen acute, the coxae throughout nar- 

 rowly separated ; body oblong-oval to parallel, moderately convex ; 

 propleurae with or without bristling hairs. Habitat widely ex- 

 tended in the Sonoran and Pacific regions. [Type E. difficilis 

 Lee.]. = Cotiipiiius Lee Eusattus -f 



Intercoxal process obtuse, the coxae more widely separated throughout ; 

 body more broadly rounded, very convex, the sculpture more muri- 

 cate ; propleurae with more conspicuous bristling hairs. Habitat ^ 

 as in Eusattus. [Type Eusattus inuricatus Lee] ...Sphaeriontis 



8 — Scutellum well developed, triangular 9 



Scutellum subobsolete, very minute, triangular 12 



9 — Posterior angles of the prothorax strongly posteriorly produced, 

 as in the preceding group of genera; palpi more elongate than 

 usual ; last three joints of the antennic moderately dilated ; basal 

 joint of the anterior tarsi rather longer than the next two com- 



