MORGAN HEBARD I3I 



orange. Limbs light ochraceous-buff, the spines and tarsal claws faintly tinged 

 with ochraceous-orange. 



In addition, two male paratypcs, taken on the Rio Trinidad, 

 Panama, by A. Busck, March 17 and June 3, 191 2, are before us. 

 Chorisoneura fuscipennis new species (Plate VI, figure 11.) 



The present species is closely related to C. flavipennis Saussure 

 and Zehntner,!"" with which it agrees in general size, reddish 

 general coloration and immaculate head. The present species is 

 distinguished by the color of the tegmina, which are less suffused 

 and not as tawny; dark wings, with area of clubbed portions of 

 costal veins buffy; male subgenital plate having the styles more 

 elongate and slender, and in the female by a slight, but distinctly 

 less, reduction in the organs of flight. 



These two species form a unit in the genus, which we would call 

 the Flavipennis Group. 



As \n flavipennis, examples showing intensive coloration have the 

 humeral trunk strongly darkened, but, unlike that species, the 

 pronotum then has the caudal margin very narrowly whitish. 



Type. — c? ; Porto Bello, Panama. February 24, 191 1. (A. 

 Busck.) [United States National Museum.] 



Size large for the small species of the genus; form depressed; surface glabrous. 

 Head with occiput largely exposed cephalad of pronotum; interocular space slightly 

 less than one and one-half times the occipital ocular depth, distinctly less than width 

 between antennal sockets. Ocelli obsolete. Ma.xillary palpi with fourth joint 

 three-fifths length of third, fifth (distal) joint slightly longer than fourth. 



Pronotum transverse, subelliptical, greatest width very slightly caudad of mesal 

 point; caudal margin transverse, very feebly convex, cephalic margin slightly more 

 convex. Tegmina surpassing abdomen by more than pronotal length, elongate 

 lanceolate; costal and sutural margins evenly and feebly convergent, straight from 

 proximal third to distal portion of tegmina, where they are convex convergent to 

 the moderately acute angulate, sharpK- rounded apex; marginal field narrow, reach- 

 ing only slightly distad of apex of anal field ; discoidal vein longitudinal, with (twelve 

 to fifteen) straight costal branches and with (one to two) branches at apex tow^ard 

 sutural margin; discoidal sectors (five) oblique. Wings with appendicular field 

 well developed, its length slightly less than width, basal outline forming very slightly 

 more than a right angle; (eight to nine) costal veins briefl}- and heavily clubbed dis. 

 tad, discoidal and median veins connected by (seven to nine, and one or two incom. 



""* Described from Atoyac, Vera Cruz, Mexico. \Vc have made the above comparisons 

 from two males and two females from (Guatemala and Costa Rica (three recorded by 

 Rehn from Turrialba, Costa Rica). 



MEM. AM. ENT. SOC, 4. 



