MORGAN HEBARD 139 



dextral style similar, but with externo-caudal i)roximal portion enlarged, forming a 

 considerable lobe, which is seen to be concave on its cephalic face; margin between 

 the styles brief, dextrad produced beneath the sinistral portion of the base of the 

 dextral style, in a small, subquadrate plate, which bears on its distal margin two 

 microscopic, decurved teeth. 



Allotype. — 9 ; Alhajuela, Panama. April 17, 191 1. (A. Busck.) 

 [United States National Museum.] 



Agrees closely with male. Form slightly broader, tegmina slightly shorter. 

 Interocular space wider, one and three-quarters times as broad as the occipital 

 ocular depth, about four-fifths as wide as space between antennal sockets. Dorsal 

 surface of abdomen unspecialized. Supra-anal plate triangularly produced, apex 

 moderately broadly cleft a distance twice the median width of this cleft,'"" lateral 

 portions thus formed sharply rounded, each about three times as wide as the cleft 

 at its median portion, surfaces convex. Subgenital plate scoop-shaped, with mar- 

 ginal convexity greatest latero-caudad, distal portion sharply reflexed, broad mesad 

 w^ith a medio-Iongitudinal cleft, this reflexed portion narrowing rather strongly 

 to opposite cereal bases where it disappears. 



Measurements {in millimeters) 



Length of Length of Width of Length of Width of 



CT body pronotum pronotum tegmen legmen 



Cabima, type 8 1.8 2.8 8 2.7 



Rio Trinidad, ^ara/>'/>e 7.4 1.8 2.8 8 2.6 



9 



Alhajuela, a//o/v/>f 7.1 2 2.8 7.8 2.6 



Porto Bello 7.2 1.9 2.8 7.6 2.5 



In the type the wing is 7.9 by 4.9; the intercalated triangle, 1.95 by 1.93 mm. 



Head with vertex dull ochraceous-orange. a rather broad cream colored band 

 between the eyes, below this with a very narrow band of blackish brown, below this 

 a band of cream color of double the width of the dorsal band of this color, which 

 laterad runs along the eyes to the ocellar areas, which are light ochraceous-buff; 

 below this band the face is blackish brown in a large subquadrate area, the remain- 

 ing portions light ochraceous-l)uff. X'entral surface ochraccous-tawny, shading to 

 ochraceous-buff on abdomen. Limbs ochraceous-buff tinged with ochraceous- 

 tawny. Pronotum with disk dull ochraceous-orange. with two large spots of light 

 ochraceous-buff meso-caudad, the margins of which are poorh- defined; pronotum 

 rather broadly margined for a brief distance meso-cephalad and along the entire 



'"" As the length of the supra-anal i)late shows differences of specific diagnostic value 

 in males of Chorisoneura, we believe that the degree of production of the female sub- 

 genital plate may prove to have some value as well. Slight differences in the character 

 of the apical cleft, however, such as shown between C. panamae, here described, and the 

 present species may be due to individual variation. We have already ascertained that, 

 in Ischnoptera, the form of the apex of the female supra-anal plate is subject to decided 

 variation in some of the species. In the present genus females hold the extruded ootheca 

 firmly with margins fitting into the distal clefts of the supra-anal and subgenital plates. 



MEM. AM. ENT. SOC, 4. 



