2 JOHN B. .SMITH. 



secondaries somewhat produced at the apex and a little retracted 

 between veins 4 and (>. Front and palpi with short woolly ves- 

 titure, the latter hiding the obtuse little terminal joint of the palpus. 

 Thorax convex, with a sharp crest behind the collar and a trunca- 

 ted tuft posteriorly. Abdomen plump, in the male truncate at tip, 

 in the female pointed; without tufts or with only a few divergent 

 hairs on the first segment. Tongue spiral. Eyes naked. Antenna? 

 thick, in the male with brushdike cilise and either smooth or with 

 pyramidal teeth. Legs short and thick. Front without projections 

 or similar modifications. 



Strictly construed this definition excludes more than half of our 

 species, which are yet not referable to Gortyna because of the 

 unarmed front. 



The truth is, Mr. Grote realized that the were two divisions 

 without quite hitting the essential difference between them. 



What may be called. the first section contains species which agree 

 with the characters above given by Lederer and of which atlantim 

 and immanis of our fauna may he considered representatives. 



The second section, for which the term Papaipema is proposed, 

 consists of those species with broader primaries, the apex acute, the 

 outer margin a little excavated below it and then bulging out at the 

 middle. The male antenme are simple and the anterior thoracic 

 tuft is broad, transversely flattened, very prominent and usually a 

 little notched centrally. It resembles in appearance an adze set 

 up just behind the collar. Accompanying these points of difference 

 is a very decided peculiarity of the male gentalia, for, while in 

 Hydroeda proper there is nothing especially characteristic, nearly 

 all the species of Papaipema have the harpes more or less forked 

 and with a triangular patch of spinulated surface at the tip. The 

 clasper is in almost all cases a long, stout, curved hook ; but is 

 unique in having the outer curve strongly toothed. This character 

 is so unusual and so constant that it becomes important, especially 

 in combination with the superficial peculiarities already mentioned. 



The section Hydrxcia, as represented in our fauna, is not particu- 

 larly compact, and is easily divisible into sections containing from 



one to three specie-. 



Albilunata and v-album differ from all the other species by the 

 obtuse and rather short, broad primaries, which, as the species are 

 compactly built, give them a heavier appearance than usual. The 

 anterior thoracic tuft is somewhat loose and rather divided than 



