MORGAN HEBARD 87 



Size large for the genus; form elongate, graceful, as in grata. Head with eyes 

 widely separated, interocular width least dorsad, nearly twice that between anten- 

 nal sockets, ocellar spots very small. Maxillary palpi with third joint slightly 

 longer than fourth, fifth joint enlarged and about one and one-fifth times as long as 

 third joint. Antennae longer than body, heavily plumose in proximal two-fifths, 

 this heaviest in distal section of this portion. Pronotum rather elongate, decidedly 

 broader caudad than cephalad; cephalic margin truncate, caudal margin broadly 

 obtuse-angulate convex. Tegmina and wings elongate and slender. Tegmina with 

 numerous regular costal veins and (six) longitudinal discoidal sectors. Wings 

 with costal veins weakly thickened throughout almost their entire length; ulnar 

 vein with (two) complete branches which spring from the proximal half of the vein. 



Supra-anal plate triangularly produced, about half as long as basal width, sides 

 of produced portion feebly concave to broadly rounded apex. Cerci slender, flat- 

 tened dorsad, segments (thirteen) strongly convex ventrad with lateral margins 

 cingulate. Subgenital plate broad, transverse, evenly convex, free margin broadly 

 and evenly convex. Limbs elongate and slender. Ventro-cephalic margin of 

 cephalic femora armed with a few elongate heavy spines, succeeded by a row of 

 closely placed short but moderately stout spines, terminating in three heavy spines 

 elongate in increasing ratio distad. Four proximal tarsal joints each supjjlied 

 ventro-distad with a very small pulvillus. Tarsal claws simple, delicate. Mod- 

 erately well developed arolia present. 



Head, ventral surface and limbs shining black, except ocellar spots, brief suffu- 

 sions at bases of coxae and suffusion meso-proximad on abdomen which are pale 

 orange. Antennae black, except for a white annulus which includes the first seven 

 joints beyond the plumose portion. Pronotum shining orange-rufous e.xcept for the 

 produced caudal portion which is black, the cephalic margin of this area sharply 

 defined, transverse but somewhat undulating. Tegmina weakly translucent, black 

 except for a roughly triangular solid area of pale orange which occupies nearly half 

 the tegminal surface, its base the proximal three-quarters of the costal margin, its 

 apex broadly truncate, situated just beyond the angulation of the ulnar vein; the 

 concealed portion of the dextral tegmen when at rest broadly suffused with pale 

 orange medio-longitudinally, there transparent. Wings black at base and apex of 

 anterior field, area of costal veins pale orange, other portions transparent, pale 

 orange, the base and free margin of the radial field broadly tinged with black. 

 Remaining dorsal surface of insect shining black. Cerci black proximad with distal 

 three-fifths whitish. 



Length of body, 13; length of pronotum, 4.9; width of pronotum, 4.9; length of 

 tegmen, 14.5; width of tegmen, 3; length of wing, 13; width of wing, 5.6; length 

 of cercus, 3.3; length of caudal tibia, 6.1 millimeters. 



The type of this beautiful species is unique. 



ME^kl. AM. ENT. SOC, 4. 



