151 



7a Frons with the lateral keels paler than the ground colour. 

 (II) 



8 Frons dull yellowish or testaceous (9) 



8a P>ons shining, fuscous or subsanguineous (lo) 



9 Hind margin of pronotuni w'dely angulately emarginate. 

 3 parysatis 



ga Hind margin truncate 2 ordovix 



10 Middle keel un face- especially on clypeus, paler than the 

 ground colour 9 hyas 



loa Middle keel concolorous with the disk lo disouymos 



11 Ground colour of frons pale yellow (12) 



iia Ground colour dark yellow (15) 



12 Tegmina blackish 8 mataiu'fn 



12a Tegmina yellowish hyaline (,13) 



13 Head dorsally longer than wide. 11 ochrias 



13a Head dorsally not longer than wide (14) 



14 Male: pygophor blackish 7 laciilis 



14a Male: pygophor yellowish 6 dryope 



15 Head distinctly produced in front of the eyes (16) 



15a Head not, or scarcely, produced in front of the eyes. . .(18) 



16 Tegmina dark fuscous, whitish opaque apically 



5 albotristnafiis 



16a Tegmina hyaline or cinereous or fuscous, immaculate.. (17) 



17 Frons long and narrow, lightly and gradually narrowing 

 basally; lateral keels of pronotuni not curved under the 

 eyes, but reaching posterior margin of pronotuni. 4 ostorius 



17a Lateral margins of frons slightly sinuate, a trifle broader 

 apically than basally; lateral keels of pronotuni curving 



outward- not reaching posterior margin of pronotuni 



I thycstcs 



18 Long-winged forms. (19) 



i8a ^hort-winged forms (20) 



19 Scutellum black 19 astyanax 



19a Scutellum with the hind angle white 18 puclla 



20 Apical margin of tegmen very narrowly white (21) 



20a Apical margin not continuously white 20 algebra 



20b Apical margin rather broadly white 17 astyanax 



21 Tegmina deep fuscous 21 dilpa 



2ia Tegmina pale, partlv smoky 18 puclla 



