42 



keel, sides with broad keels beset with wax pits ; transverse keel 

 dividing face from vertex : face subparallel with large lateral 

 keels beset with wax pits on inner side ; clypeus broad at base, 

 tricarinate, lateral carinae very distinct, wider apart at base than 

 keels of face. Pronotum short, widely angularly emarginate be- 

 hind, shoulder keels very small ; scutellum as long as broad, lat- 

 eral angles about middle, distinctly tricarinate. Tegmina very 

 near to Thyrocephahis, the radial cross-vein very short, media 

 with two sectors, cubitus furcate. 



This genus is separated from Thyroccphalus by the rounded 

 profile of the head and the circular subantennal process. 



(1) C. auihoincnsc {$) sp. nov. 

 Pis. I fig. 25, II fig. 12. 



Shiny black, the tip of clypeus, labium and legs yellowish. 



Tegmina and wings black, a minute red spot at end of sub- 

 costal cell. 



Ventral edge of pygophor truncate, lateral edges sinuous, anal 

 segment about three times the length of the width of base, anus a 

 little beyond middle, in profile it is swollen, apex angularly 

 emarginate forming two downward-pointing points ; styles long, 

 narrow, subparallel sided, reaching to end of anal segment, dorsal 

 edge slightly curved, ventral edge with small rounded projection 

 about a third from apex, apex forming an inwardly turned point. 



Length 2.8 mm. ; tegmen 3.6 mm. 



Habitat : Amboina. 



GROUP II. 



1. Media not arising from radia, or arising before forking 



of subcosta and radia 2 



Media not separating from radia until after forking of 

 subcosta and radia 2?^ 



2. First median sector arising before apical third of tegmen . . 3 

 Median sectors confined to apical third or tegmen, first 



cubitus often joining second, enclosing second cubital 

 cellt ' ^ 22 



3. Forking of subcosta and radia at or before the middle of 



tegmen (subcostal cell long) 4 



Forking of subcosta and radia beyond the middle of teg- 

 men (subcostal cell short ) 19 



t In Rohigus the first median sector is before the apical third, but it comes into 

 this group. 



