MORGAN HEBARD 5 I 



which portion of this margin is attached a less heavily chitinous plate, about twice 

 as long as wide, directed dorsad, with margin convex (the sinistral fused and special- 

 ized style), thickened along its internal margin, this thickened portion armed distad 

 on its external face with a single blunt tooth ; dextrad is attached a less heavily chiti- 

 nous triangular plate (the dextral fused and specialized style), its internal margin 

 thickened into an elongate irregularly cylindrical process, over twice as long and 

 bulky as the analogous sinistral development, bearing a small aciculate thorn at its 

 base, and with its twisted apex curving caudad with the ventro-caudal margin 

 microscopically but very sharply serrate, these serrations directed proximad. 



Allotype. — 9; same data as type hut taken May 6, 191 1. 

 [United States National Museum.] 



Agrees with male in ambisexual features, differing in the following respects. Size 

 and form similar. Supra-anal plate rather deeply rectangulate-emarginate distad, 

 the two apices thus formed rectangulate, sharply rounded. Subgenital plate very 

 feebly produced beyond cereal bases, short, scoop-shaped, entire. 



Coloration similar in the se.xes. Head chestnut; ocellar spots, a diffused medio- 

 longitudinal line in the inter-ocular-ocellar area and cheeks ochraceous-tawny. 

 Disk of pronotum rich chestnut, paling in a very small meso-caudal area to ochra- 

 ceous-tawny; lateral margins transparent, rich buff. Tegmina immaculate, trans- 

 lucent, chestnut when at rest, argus brown when spread; costal field transparent, 

 ochraceous-buff, this continued along the costal margin to near its apex. Wings 

 hea\ily washed with prout's brown in area of costal veins and in areas of rami of 

 ulnar and axillary \-eins, radiate field washed less heavily with this color, other por- 

 tions, including intercalated triangle, very weakly washed with prout's brown. 



Measurements {in millimeters) 



Length of Length of Width of Length of Width of 



O body pronotum pronotum tegmen tegmen 



Rio Trinidad, /_v/5e 9.5 2.8 3.7 10.8 3.4 



Tabernilla, />ara/>'/>e .... 10 2.8 3.8 11. 2 3.7 



Chorrerdi, paratype 10.5 2.9 3-65 il 3.8 



9 



Rio Trinidad, c//o/j/>e. . . 9.5 2.8 3.9 10.7 3.3 



Paraiso, paraiype 9 3 4 10.9 3-55 



Taboga Island, />ara/_v/>e. . 9 2.9 3-95 10.8 365 

 The width of the intercalated triangle of the wings ranges from 2.1 to 2.3 mm. 



In addition to the type and allotype, the following para types 

 are before us. 



Tabernilla, Canal Zone, Panama, V, 14, 1907, (Busck), i cf . 

 Paraiso, C. Z., Pan., I, 22, 191 1, (Schwarz), i 9. 

 Taboga Island, Pan., \'I, 9, 191 1, (Busck), i 9. 

 Chorrera, Pan., V, 14, 1912, (Busck), i <f. 



MEM. AM. ENT. SOC, 4. 



