ART. 19. MOTI-IS OF THE GENUS DIATKAEA DYAR AND HEINRICH 31 



Expanse. — 65 mm. 



Female genitalia figured. 



Type. — In National Collection. 



Type locality. — Volcan de Santa Maria, Guatemala. 



Genus SILVERIA Dyar 



SilveiHa Dyar, Ius. Ins. Mens., vol. IS, 1925, p. 10. 



Front gently convex, smooth. Ocelli present. Labial palpi long, 

 porrect, slender, extending over twice the length of the head. Maxil- 

 lary palpi triangularly dilated Avith narrow scales. Antennae of 

 male slightly thickened; of female filiform. Fore wing with vein 3 

 from before angle of cell ; 4 and 5 separate, from the angle ; 6 from 

 well below apex of cell ; 7 from apex ; 8 and 9 long stalked, from 

 before apex; 10 close to the stalk of 8-9; 11 anastomosing with 12. 

 Hind wing with 4 and 5 approximate, from angle of cell ; 6 from the 

 cross- vein below apex of cell; 7 from the apex, anastomosing with 8 

 for over half its length. 



Male genitalia with vinculum triangular. Harpe undivided; tri- 

 angular ; costa simple, rather Avealdy chitinized. Uncus and gnathos 

 hooklike; gnathos unspined. Anellus consisting of a detached juxta, 

 and a flattened plate hinged to bases of harpes and set at right angle 

 with aedoeagus, and with a pair of greatly produced slender arms 

 arising from the plate and lying along underside of aedoeagus. 

 Aedoeagus very long and flattened. 



Female genitalia with du'jtus bursae short and heavily chitinized. 

 Bursa copulatrix narrow and greatly elongated; without signum. 

 Ovipositor and supporting rods normal. 



Abdomen of male without tufts on second segment. 



The peculiarly developed aedoeagus and anellus are the distin- 

 guishing genitalic characters. They are approached in Chilo phrag- 

 mitellus Hiibner of Europe; but that is to be expected, for in ChUo 

 one finds nearly all the Crambid genitalia types reproduced. 



Genotype. — Silveria liexhex Dyar. 



KEY TO THE SPECIES OF SILVERIA 



1. Black irroratioDs of fore wing evenly seattererl. 



chiriquitensis (Zeller) (p. 31) 

 Black irrorations forming lines on the veins hexhex Dyar (p. 32) 



SILVERIA CHIRIQUITENSIS (Zeller) 

 Figures 43, 44 



Eromene chiriquitensis Zellek, Hor. Ent. Soc. Ross., vol. 13, 1877, p. 72. 

 Silveria adelphiJia Dyar, Ins. Ins. Mens., vol. 13, 1925, p. 11. 



This species is before us from Mexico and Guatemala. 

 Expanse. — Male, 11-12 mm.; female, 15-18 mm. 



