250 GEORGE D. HUIJ5T. 



t^ubftiinilies are very closely related, and the absence of the frenulum 

 merely marks the completion of a tendency shown very distinctly 

 in the nearly allied genera of the Hydriomin?e, such as on the one 

 hand Lobophora, Trlchopteryx, etc., and on the other Ahophila, 

 Paleacrita and Eudale. 



Dyspteridin^, 

 Synopsis of Genera. 



1. Antennse of % bipectinate. 1. D.yspteris. 



AiitenniP of % not bipectinate 2. 



2. Hind wino^s of 9 partly or not at all developed 3. 



Hind wings of 9 developed as in % 5. 



3. Hind wings of 9 obsolete 7. Rachela. 



Hind wings of 9 partly developed, about as long as thorax 4. 



4. Tongue present, though weak .5. Opheropt era . 



Tongue obsolete 6. Paraptera. 



.5. Fore wings with one accessory cell 2. Cyst«'opteryx. 



Fore wings with two accessory cells 6. 



6. Hind tibia; of % with hair pencil 3. Nyclobia. 



Hind tibise of % without pencil 4. C'ladara. 



1. DYSPTERIS Hiibn. 



Verz. 286, 1818. 



Type D. amain Cr. 



Palpi short; clypeus not tufted; antennte bij^ectinate in S , sim- 

 })le in 9 ; thorax and abdomen untufted ; hind tibiie with all spurs 

 in both sexes; fore wings broad, even, inner margin short, 12 veins, 

 11 on 10, with one accessory cell ; hind wings 8 not anastomosing 

 with cell, but joined in both sexes with it by a cross-vein beyond 

 middle; hind wings of % with vitreous spot along inner margin 

 near base ; frenulum wanting; venation of % very much distorted, 

 the cell being very much shortened and drawn in, and veins 1, 2 and 

 8 obsolete. In 9 2 and 3 are present, 4 widely separate from 5,' 6 

 and 7 stemmed. 



This genus has heretofore been catalogued with the "(ireens" so- 

 called, but beyond question it has no affinities with them. 

 Species. — D. ahortivaria H.-Sch. 



2. <"YSTEOPTERYX n. gen. 

 Ty]ie ririihita Grt. 



I'alpi sliort, porrect, quite heavily scaled ; front flattened ; antennje 

 ciliate in l)oth sexes; fore til)i{e iniarmed ; hind tibije with end })air 

 of spurs only, without hair pencil in % ; thorax and abdomen un- 

 tufted ; fore wings 12 veins, one accessory cell, 6 stemmed witli 7; 



