MORGAN HEBARD 59 



Wings delicate; proximal (six) costal veins briefly but heavily clubbed distad; ulnar 

 vein with (five*-) complete branches; intercalated triangle small. 



Supra-anal plate with proximal portion not broad, transversely conca\-e, small 

 meso-distal portion strongly deflexed with surface convex; lateral margins nearly 

 straight, almost transverse, weakly oblique to mesal third of area between cerci, 

 there concave, forming the lateral margins of the produced area, which is subrec- 

 tangulate, slightly wider than long, with disto-lateral angles broadly rounded and 

 distal portion sub-bilobate. 



Concealed genitalia: within the anal chamber and next to the subgenital plate 

 lies a very large, roughly circular, subchitinous mass, concealing the genital hook 

 and surrounding specialized plates; sinistrad above this is a smaller subchitinous 

 plate from which projects a delicate aciculate chitinous process which curves strongly 

 sinistrad ; dextrad above the same mass a very elongate, aciculate, feebly undulating 

 chitinous process is directed across the distal portion of the anal chamber, reaching 

 the base of the sinistral style; the paired plate beneath the supra-anal plate is large 

 and simple. 



Subgenital plate convex; free margin remarkably asymmetrical, truncate; free 

 margin sinistrad, beyond sinistral cercus, produced in a small, bulbous, acute-angulate 

 process, bearing distad a small cylindrical process, about twice as long as broad, 

 with apex rounded, supplied on its dextral (internal) face with minute, microscopic, 

 chitinous spinulae, from this process to the base of the cercus the free margin is 

 straight, weakly oblique, heavily supplied with larger, microscopic, chitinous 

 spinulae, there produced in a very slender, nearly straight process, about as long as 

 the cereal width, which lies dextrad along the free margin, from the dextral base of 

 this process the margin is continued, straight, weakly oblique, almost to the mesal 

 point, where a sudden and very deep emargination causes this portion to form a 

 large acute-angulate process with apex sharply rounded, directed dextrad, from the 

 base of this angulation the margin is weakly concave, very slightly oblique at the 

 slightly produced dextral extremity, before the dextral cercus, where an acute- 

 angulate projection with apex bluntly rounded and deflexed occurs, its latero-dex- 

 tral margin straight to base of subgenital plate. Limbs, armament of same, pul- 

 villi, tarsal claws and arolia as given for acanthastylata. 



Allotype. — 9; Alhajucla, Panama. May 3, 191 1. (A. Biisck.) 

 [United States National Museum.] 



Agrees closely with the allotypic female of panamae, diff'ering in the cross-vein- 

 lets of the tegmina, which are much less conspicuous and are confined to the distal 

 portions. Close resemblance to females of N. fratercula Hebard is also found, the 

 female of the present insect differing in its larger size and darkened distal veinlets 

 of the tegmina and wings. The great difficulty in separating females of the present 

 group of species is discussed under the allotypic description of the preceding species, 

 tanamae. 



*- Four in other specimens. 



MEM. AM. ENT. SOC, 4. 



