63 



6. Antennae cylindrical Zoraida 



Antennae flat 7 



7. Scutellum without carinae Peggia* 



Scutellum with three carinae Peggiopsis 



8. Head as wide, or wider than, pronotuni 



Philadelphia, Fcscciniia ?* 



Head not as wide as pronotum 9 



9. Face centrally carinate Pauiaiuhnigo* 



Face not centrally carinate 10 



10. Head in i)rofile projecting angularly in front of eyes. . . . 



Jada*, Helcita?* 



Head in profile not projecting angularly in front of eyes. .11 



11. Clypeus rounded, carinae indistinct 12 



Carinae on clypeus very distinct 13 



12. Subcosta and radia forking at or beyond middle of teg- 



men Diostrombtis 



Subcosta and radia forking before middle of tegmen. . . . 

 Cavima* 



13. Face slightly widened apically (carinae diverging), teg- 



men truncate at apex Afaka* 



Face with carinae contiguous to apex, tegmen not truncate 

 at apex 14 



14. Face longer than clypeus ; five median sectors, first fur- 



cate Phcuicc* 



Clypeus longer than face 15 



15. Media with five or six unbranched sectors Prontista 



Media with six sectors, the third furcate Paraprontista 



Sikaiana Distant. 



A. M. N. H. (7) XIX p. 398. 



Mr. Distant suggests that this genus may be allied to Basilco- 

 cephalus, but apart from the tegmina, which places it in a dififerent 

 section of the Derbidae, the pronotum alone would separate it very 

 distinctly. Mniria and Lcomelicharia are very closely allied to it. 

 None of the species that I place in this genus have carinae on 

 the clypeus. 



(1) 5". fidva sp. nov. ( 5 ). 



Head, thorax and abdomen light stramineous fuscously mot- 

 tled, legs lighter; tegmina vitreous, iridescent, costa red, broken 

 up into minute spots by small patches of wax ; veins brown, red 

 towar-'s apex, a small brown streak across extreme base, another 

 across costa and radial cells a little higher up, a larger mark 

 through middle of costal and, radial, and apex of median, cells, 



