158 Journal of the Mitchell Society [May 



HYSTEROPTERUM 



97. Color dark brown; the fore wings with numerous round points; anterior 



margin of the vertex broadly sinuate between the eyes 246 



Hysteropterum yunctifcrum Walker 

 Color ochraceous orange, the wings clouded with brown; anterior margin of 

 the vertex nearly straight between the eyes, indented medianly 247 



H. auroreum Uhler 



THIOXIA 



98. Vertex broader than long 250 99 



Vertex as long or longer than broad 25& 100 



99. Basal margins of the frons nearly straight between the eyes; fore wings 



unicolorous with dark veins 249 Thionia simplex Germar 



Basal margins of tlie frons broadly concave between the eyes; fore wings 

 variegated 251 T. eUiptica Germar 



100. Frons slightly arched with a bright yellow transverse band 



T. iransversalis Meliehar 

 Frons not arched, without a transverse band 101 



101. Vertex acutely produced anteriorly; cells of fore wings with minute dark 



points 252 T, producta Van Duzee 



Vertex rounded or only obtusely angulate anteriorly; fore wings variegated 

 256 " ." 10:2 



102. Vertex rounded anteriorly; fore wings with an ocellated spot near the 



apex 254 T. oceUata Meliehar 



Vertex angularly produced anteriorly; fore wings variegated 256 103 



103. Vertex strongly five-angled, the lateral margins flaring anteriorly 255 



T. quinquata Metcalf 

 Vertex obtusely jnoduced, not five-angled, lateral margins parallel 256 



T. luUata Say 



104. Fore wings overlapping at the apex 72 srBFAMii.Y achilix^ lO.l 



Fore wings not overlapping at the apex 124 



105. Pronotum short, collar-like; vertex not much produced, with median carina 



266 Genus Catonia Uhler 113 



Pronotum not collar-like; vertex jiroduced, with median sulcus 258 



Genus Epiptcra Metcalf 106 

 EPIPTERA 



106. General color blackish, nearly uniform 112 



General color brownish variegated with grayish 107 



107. Frons black with a broad band of white across the apex 49 Ill 



Frons not black, not banded with wliite 47 108 



108. Clypeus distinctly darker than tlic frons 47 109 



Ciypeus not distinctly darker tliaii the frons 48 110 



