MORGAN HEBARD 69 



the type found in rufa debilis Hebard.^^ Females are distinguished 

 by their general black coloration and decidedly smaller size than 

 those of the known species of the Morio Group. 



Type.— d"; Porto Bello, Panama. April 20, 1912. (A. Busck.) 

 [United States National Museum.] 



Size medium large; form moderately stout, slightly more slender than is normal in 

 mfa riifa. Interocular space rather narrow, about two-thirds as wide as that 

 between the ocelli, about one-third as wide as that between the antennal sockets. 

 Ocelli large and distinct, flattened surfaces of ocellar areas forming a rather sharp 

 angle with inter-ocular-ocellar area, in this respect agreeing more closely with /. morio 

 Burmeister. Maxillary palpi rather short; fourth joint slightly shorter than third 

 and but two-thirds as long as fifth (distal) joint, much as in morio. Latero-caudal 

 sulci of pronotal disk distinct. Tegmina and wings fully developed, much as in 

 rufa rufa, tegmina more slender, portion of dextral tegmen concealed when at rest, 

 not strikingly transparent. Wings suffused, with veins dark. Dorsal surface of 

 abdomen specialized as is characteristic for the genus. ''^ 



Supra-anal plate produced, with lateral margins moderately convergent to 

 median portion (over one-third of whole) where the greatest production occurs, 

 this portion not as broad as in rufa rufa, the margin there being convex and 

 supplied with long hairs, the entire surface subchitinous to and including the caudal 

 margin, thus forming a broad transverse oval. 



Concealed genitalia: titillator alone visible; elongate, with dextral margin straight, 

 sinistral margin convex, widening from narrow proximal portion and then tapering 

 to the straight acute apex, entire surface thickly covered with minute short teeth 

 directed distad. 



Subgenital plate strongly asymmetrical, surface convex except at produced 

 portion where it is moderately concave; produced portion semicircular; sinistral 

 style situated at sinistral base of produced portion, unspecialized, straight, elongate, 

 conical, about three times as long as width at its slightly enlarged base; dextral 

 style situated slightly sinistrad of mesal point on margin of produced portion, 

 directed rather strongly sinistrad in thick basal portion, mesad bent more strongly 

 sinistrad with distal portion conical and armed with a number of straight spiniform 

 teeth. 



Allotype.— 9 ; Tabernilla, Canal Zone, Panama. (A. Busck.) 

 [United States National Museum.] 



Agrees with male in ambisexual characters, differing in the following features. 

 Size slightly larger, form appreciably broader with pronotum more ample. Inter- 

 ocular space very slightly wider than that between the ocelli. Ocellar areas not 

 fully as sharply defined. Tegmina and wings proportionately fully as elongate as 

 in the male, well surpassing the cereal extremities. Supra-anal plate with margin 

 very feebly concave at cereal bases, between these triangularly produced with apex 



9» Figured, Trans. Am. Ent. Soc, xlii, pi. xvi, fig. 6, (1916). 



39 See Hebard, Mem. Am. Ent. Soc, 2, p. 62, (1917). 



MEM. AM. ENT. SOC, 4. 



