ii6 



2a Frons not transversely impressed; more or less strongly 

 carinate medianly (3) 



3 Lateral keels of frons meeting at its base and forming an 

 angle there (4) 



3a Lateral keels of frons not meeting directly at its base, 

 which is more or less widely trnncate (or slightly produced 

 laterally ( 5 ) 



4 Vertex not longer than the eyes; genae foliaceous; eyes 

 not nearly touclrng the lateral margins 12 Majclla 



4a Vertex longer than the eyes, genae not foliaceous; eyes 

 practically touching lateral margins 11 Callichlamys 



5 Vertex longitudiiiallv impressed, with a further circular 

 impression in the middle 10 Francesco 



5a \"ertex often longitudinally impressed (entirely, or between 

 the keels) but not further impressed circularly '...(6) 



6 Two opaque white bands across the face (7) 



6a Face not banded (8) 



7 A'ertex not carinate medianly, very transverse, apical mar- 

 gin not nearly touching- apical margin of head dorsally 

 and not connected therewith bv keels 9 PyrrhylUs 



7a \^ertex carinate medianly, not transvere, apex touching 

 the apical margin of the head dorsally 8 Benella 



8 A'ertex transverse 7 Achihis 



8a A'ertex not transverse (9) 



9 3 to 4 middle apical cells of tegiuina distinctly longer than 

 wide (10") 



9a 3 to 4 middle apical cells of tegmina not (or scarcely) 

 longer than wide 6 Salcinina 



10 Frons basally slightly angularly produced laterally 



5 Argelcusa 



loa Frons basally truncate (or if very sh'ghtly produced angu- 

 lately at the sides, then also similarly in the middle). .(11) 



11 Vertex very lightly impressed longitudinally on each side 

 of the middle keel, which is strong (12) 



iia Vertex deeply impressed longitudinally, not (or feebly) 

 keeled 4 CaUincsia 



12 Lateral keels of vertex anterolaterallv obtuse angled 



3 Enrynomcns 



12a Lateral keels of vertex meeting anteriorh- acutely or 

 roundly-acutely (13) 



13 Apical cells of tegmina distinctl}- declivous, tegminal veins 

 granulate 2 Cythna 



