Sept.-Dec., I9i8.] SCHAEFFER: OsTOMID^. 191 



than the tenth joint ; head subtriangularly flattened from a little 

 below occiput to apex and sometimes more or less distinctly ex- 

 cavated ; metasternum normally convex 5 



Elytra at base without deep subcircular subhumeral impression 6 



5. Last joint of labial palpi at apex narrower than the maximum thickness 



of the joint; last two ventral segments equal in length and much 

 shorter than the preceding segments ; punctuation of elytra serially 



arranged Corticotomus Sharp 



Last joint of labial palpi broad at apex, rectilinearly truncate and 

 about as wide as at the middle, rather rapidly narrowed basally ; 

 ventral segments one to three gradually and evenly decreasing in 

 length, the fourth subequal to the third, or even a little longer and 

 the fifth much the shortest of all ; elytral punctures irregularly ar- 

 ranged, not in series Parafilumis Casey 



6. Last joint of antennal club subquadrate and wider than the tenth joint; 



head convex, obliquely declivous just before the apex; metasternurn 

 relatively strongly convex at middle, sides somewhat compressed and 

 shallowly excavated for the reception of the middle femora. 



Stenodema Schaef. 



7. All the tibife with distinct spines externally ; antennae short, extending 



backwards a little below the anterior angles Airora Reit. 



Middle and hind tibiae not spinous externally ; antennae longer, ex- 

 tending backwards to about middle of prothorax 8 



8. Lateral margin of prothorax behind middle more or less angularly 



deflexed ; basal marginal head of elytra entire ; labium very deeply, 



triangularly emarginate Temnochila Westw. 



Lateral margin of prothorax straight, not angularly deflexed behind 

 middle ; basal marginal bead of elytra distinct near humeri but ob- 

 literated near scutellum ; labium feebly emarginate at apex. 



Tenebroides Pill. & M. 



Nemosoma schwarzi new species. 



Cylindrical, convex, black or piceous, antennae, palpi, legs and abdomen 

 paler, each elytron with a large, oblique yellowish basal spot not quite attain- 

 ing sides nor suture and a slightly smaller subsutural spot of the same color 

 behind middle. Head moderately coarsely punctate, punctures somewhat elon- 

 gate and more closely placed near apex. Antennae eleven-jointed. Prothorax 

 rather feebly narrowed posteriorly; lateral margin feebly deflexed in front' 

 apical angles obliterated, basal angles obtuse; surface moderately coarsely but 

 not closely punctate. Elytra convex ; sides parallel, surface confusedly punc- 

 tate, punctures moderate. Prosternum moderately coarsely punctate, punc- 

 tures more numerous and a little coarser at sides. Metasternum at sides 

 coarsely punctate, punctures smaller at middle. Ventral segments of abdomen 

 apparently impunctate. Length 3 mm. 



