678 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 86 



10. Genus AROGA Busck 



Plate 61, Figubes 15-17 ; Pi-ate 68, Figures 50-52 



Aroga Busck, Proc. U. S. Nat. Mus., vol. 47, p. 13, 1914. (Genotype, Oelechia 

 parapluteUa Busck.) 



Second joint of labial palpus with slightly furrowed brush on un- 

 der side; terminal joint slender, acute, nearly as long as second. 



Fore wing with veins 2, 3, 4, and 5 nearly equidistant. Hind wing 

 with veins 3 and 4 closely approximate or connate, 6 and 7 separate, 

 5 cubital. 



Male genitalia with uncus a long, slightly bent, pointed hook; 

 gnathos absent; harpe single, long, slender, ending in a sharp point; 

 vinculum with two large, broad, hairy posterior processes.^ ^ Aedea- 

 gus straight or nearly so, with base not bulbous, entrance hole for 

 penis at the base, not lateral. Ventral sclerites of eighth abdominal 

 segment large, elaborately developed with lateral branches, discern- 

 ible without dissection on the dry pinned specimen. 



Female genitalia with signum a nearly square plate with strong, 

 pointed, sometimes serrate spines from the four corners. 



The genus was erected in an attempt to clarify Geleehia of authors 

 on venational characters, stress being laid on the separate veins 3 

 and 4 in the genotype; this character, however, is found to be not 

 dependable, even within the species, but the genitalia prove the genus 

 to be valid, embracing a natural group of species with very striking 

 genital characters in common. 



AMERICAN SPECIES OF AROGA 



para phi tclla (Busck). 

 pauIcUa (Busck). 

 IcncauieUa (Busck). 

 achaniaca (Meyrick). 

 chlorocrana (Meyrick). 

 h ipposaris ( Meyrick ) . 

 aristclla (Busck). 

 unifasciella (Busck). 

 campt ogrom ma ( Meyrick ) . 



morcneUa (Busck). 

 coloradcnuis (Busck). 

 aUcrirUa (Busck). 

 rigidac (Clarke). 

 criogouclla (Clarke) . 

 c! dorado (Keifor). 

 monumentella (Chambers). 

 trialbamaculella (Chambers) . 

 nym: epigaeella (Chambers). 



Syno- 



EUROPEAN SPECIES OF AROGA 



velocella (Duponchel). \ [Probably others.] 



All the above names with the exception of parapluiella (Busck) are new 

 transfers from Oelechia. 



!■' These processes could be regarded as the lower branches of the harpes, but from com- 

 parison with similar structures in other genera I consider them a part of the vinculum. 

 Compare with footnote uniler Frumenta (p. .^77). 



