218 SYNXOMID^. 



Genus NYRIDELA. 



Type. 



Nyridela, Lucas, Sagra's Hist. Cuba, Ins. p. 663 (1857) chalciope. 



Mochloptera, Butl. Journ. Linu. Soc, Zool. xii. p. 386 (1876)... chalciope. 



Proboscis well developed ; palpi upturned, the 2nd joint reaching vertex of 

 head, the 3rd joint sliort and L-lunt ; antennte bipectinate, with short branches 

 dilated at extremity and ending in a bristle ; {\h\x with the spurs short ; 

 abdomen of male with ventral valve covering basal segments. Fore wing with 

 vein 2 from near angle of cell and downeurved ; 3, 4, 5 well separated at 

 origin; 6 from upper angle; 7,8,9, 10 stalked; 11 from cell. Hind wing 

 with the lower part of the cell very short, the discocellulars angled just above 

 median nervure ; veins 2 and 4 on a long stalk ; 3 and 5 absent; 6, 7 from 

 upper angle. 



A. Antennae wholly yellow xanthocera. 



B. Antennae black, the tips yellow chalciope. 



457. Nyridela xanthocera. 



Gymnelia xanthocera, Wlk. vii. 1603 (1856) ; Druce, Biol. Centr.-Am., 

 Het. i. p. 58 ; Kirby, Cat. Het. p. 140. 



<S . Head, thorax, and abdomen black ; antennae pale yellow ; 

 palpi, head, thorax above, and legs with patches of metallic blue ; 

 abdomen with slight metallic blue dorsal and lateral series of spots ; 

 the ventral valve edged with white and followed by two white 



Fig. 104. — Nyridela xanthocera, cf • !• 



spots and a sublateral pair ; wings hyaline, the veins and margins 

 rather broadly black. Fore wing with some blue at base ; an 

 oblique black band from costa across discocellulars to tornus : the 

 terminal band expanding slightly to apex. Hind wing with the 

 terminal band expanding below vein 2. 



5 . Abdomen with two pairs of sublateral white sjjots. 

 Hab. Mexico, Jalapa (Trujillo), Vera Cruz (//. B. S^nitJi) ; 

 Guatemala {Champion, Rodriguez); Cosxa Kica {Underwood); 

 Panama, Chiriqui, Godman-Salvin CoU. £'ay. 44 millim. Typet 

 in Mus. Oxon. 



458. Nyridela chalciope. 



Isanthrene chalciope, Hiibn. Zutr.Ex. Schmett. iii. p. 20, ff. 469, 470 (1827) ; 



Kirby, Cat. Het. p. 139. 

 Glaiicopis acro.vantha, Perty, Del. Anim. Art. p. 156, pi. 31. f. 4 (1834) ; 



Kirby, Cat. Het. p. 139. 



6 . Head, thorax, and abdomen black ; antennae yellow at tips ; 



