154 Journal of the ]\Iitchell Society [^^ay 



45. Macropterous wiiigs with subcostal vein bianchiug to form a distinct post 



nodal cell or post nodal cells; no brachypterous forms 518 104 



Macropterous wings with subcostal vein not branching to form a distinct 

 post nodal cell; brachypterous forms common 509 46 



46. With a distinct cross vein from costal margin to apex of clavus dividing 



the fore wings into a distinct corium and membrane with many cross 



veins 505 subfamily tropiduchin^ 47 



"With no distinct cross vein from costal margin to apex of clavus 508 49 



SUBFAMILY TROPIDUCHIN.-E 



47. Frons with a median carina 180 48 



Frons without a median (jarina 178 Pe'litropis rotulata Van Duzee 



48. Costal cross veins present ; vertex as long as the mesonotum 506 



Neurotmeta sponsa Guerin 

 Costal cross veins absent; vertex shorter tlian the mesonotum 507 



Monopsis tahida Spinola 



49. Lateral margins of the pronotum equalling its median length; head nar- 



rower than the mesonotum 201 subfamily dictyopharin^ 50 



Lateral margins of the pronotum shorter than its median length; head 

 usually as broad as the mesonotum 215 subfamily issin^ 68 



SUBFAMILY DICTYOPHARIN.i: 



50. Vertex produced in front of the eyes; anterior femora simple 184 52 



Vertex transverse; anterior femora foliaceous 182, 530 



Genus Phyllescelis Germar 51 



PHYLLOSCELIS 



51. Fore wings pale, veins brown, dotted with white 8 P. pallescens Germar 



Fore wings black, veins uniform black or broadly pale yellow 6 



P. atra Germar 



52. Fore wings pale, transparent green, much longer than the abdomen; vertex 



not suddenly constricted in front of the eyes; cephalic process triangular 



204 Genus Dictyopham Germar 64 



Fore Avings coreaceous, equal to or slightly longer than the abdomen; vertex 

 suddenly constricted in front of the eyes; cephalic process very slender, 

 nearly parallel-sided 184 Genus Scolops Schaum 53 



SCOLOPS 



36. Fore wings densely and uniformly reticulated apically 52 54 



Fore wings with only a few irregular cross veins apically 53 55 



54. Reticulations of the fore wings small, the veins margined with darker; 



cephalic process rather slender 184 Scolops sulcipes Say 



Reticulations of the fore wings large, not margined; cephalic process 

 stouter 185 S. osborni Ball 



