10 



i8 (19) Maxillary palpi five-jointed Guiiatopiis. 



19 (18) Maxillary palpi four-jointed Xcogoiiatopus. 



20 ( 17) Maxillary palpi two or three jointed. 



21 {22} Maxillary palpi three-jointed; head not distinctly 



concave above Pachygouatopiis. 



22 (21) Maxillary palpi two-jointed; head concave 



EpigoiiatopHS. 



2^ {2) ]\Iesonotiim wide, not forming a narrow stalk, species 

 winged or with rudimentary wings. 



24 (25) Front wings with a parastigma, radius complete, 



reaching the tip of the wing Lonchodryiniis. 



25 (24) Front wings without the above characters. 



26 {37) Posterior lateral angles of the pronotum not attaining 



the tegulae. 



27 (28) Alaxillary palpi very short, four-jointed; laliial palpi 



two-jointed; (parapsidal furrows distinct, but fine, 

 meeting posteriorly and enclosing a narrow triangular 

 area ) EclitJirodclphax. 



28 {2"/) Maxillar}- palpi long and conspicuous, often extending 



to or behind the posterior margin of the head beneath, 

 six-jointed ; the labial palpi three-jointed. 



29 (30) Postscutellum extremely short, transversely linear, 



vertex of head not convex, generally more or less con- 

 cave Ncodryiiiits ( ? — Dryiriiis) 



30 (29)' Postscutellum. well developed, usually about half as 



long as the scutellum. vertex of head convex. 



31 {32) Head posteriorly acutely wedge-shaped, its hind mar- 



gin well rounded, posterior ocelli placed far behind 

 the hind margins of the eyes Hcspcrodryinns. 



2,2 (31) Head posteriorly not acutely wedge-shaped, nor well- 

 rotuided behind, but straightly transversely margined 

 or nearly so ; posterior ocelli usually almost on a line 

 with the hind margins of the eyes (if placed behind 

 these the vertex is straightly margined posteriorly). 



Z2> (36) Chelae long, the chelar claw being well developed. 



34 (35) A'ertex distinctly margined posteriorly and the margin 



continued round the occiput Paradryinits. 



35 (34) A'ertex indistinctly margined, the margins failing to- 



wards the sides Cholorodryinus. 



36 (33) Chelae very short, the chelar claw simply a strong 



spine, with dilated base for articulation Pcrodryinus. 



37 (26) Lateral angles of pronotum attaining the tegulae. 



