MORGAN HE BARD 57 



spots small. Inter-ocular-ocellar area dei^lanate, weakly defined. Maxillary palpi 

 very elongate; fourth joint about four-fifths as long as third, fifth about two-thirds 

 as long as fourth, shaped as in acanthastylata. Pronotuin as in acanthastylata. Teg- 

 mina delicate; with (eight .sinistral, eight dextral) longitudinal discoidal sectors; 

 cross-veinlets distinct throughout tegmen, even appearing in distal portion of anal 

 field. Wings delicate; proximal (seven) costal veins brief!}' but heavily clubbed 

 distad; ulnar vein with (four"'') complete branches; intercalated triangle small. 



Supra-anal plate simple, about one-quarter as long as basal width, free margin 

 broadly convex bfetween cerci with an indentation feebly indicated mesad. Con- 

 cealed genitalia: dorso-dextrad is a small chitinous lobe with distal surface covered 

 with minute knobs; beneath this is a very elongate slender process, its chitinous 

 apex straight, aciculate, and just before the apex is situated another straight chiti- 

 nous aciculate projection also directed caudad; beneath this but springing from the 

 sinistral portion of the anal chamber is a very small slender chitinous process with 

 aciculate apex curved dorsad and dorsal margin with two other sharp projections; 

 genital hook of the usual form found in the genus. 



Subgenital plate generally symmetrical; free margin on each side slightly thick- 

 ened and straight to median fourth, where a sudden brief declivity occurs on each 

 side, the remaining median portion of the plate weakly chitinous with margin 

 straight, transverse. The sudden brief declivent portion of the margin sinistrad is 

 occupied dorsad bya minute, simple, very feebly articulate style, which is cylindrical, 

 feebly curved sinistrad and feebly tapering to the rounded apex, with length not 

 three times its basal width; adjacent to this style and occupying the remaining 

 ventral portion of the sinistral declivent portion of the margin is another chitinous 

 projection of very little thickness, which curves dorso-caudad, tapering to its 

 acute apex which reaches exactly as far as the apex of the style, this process armed 

 at its base with one, and along its internal margin with a few (three to five in the 

 series) minute, short but heavy spines. Dextrad the same specialization is found, 

 these processes being, however, slightly smaller, the armed process having usually 

 one less spine. Limbs, armament of same, pulvilli, tarsal claws and arolia as given 

 for acanthastylata. 



Allotype. — 9; Porto Bello, Panama. February 15, 191 1. (A. 

 Busck.) [United States National Museum.] 



This sex ver>- closely resembles females of N. f rater cida Hebard, N. impar here 

 described and probably .V. acofithastylata here described. We would note that 

 apparently the features of difference, though admittedly not of the differential 

 value usually found, are the abundance of tegminal cross-veinlets, as in the male sex 

 of this species, and the interocular space, which is slightly less than that between 

 the antennal sockets, in this feature very slightly greater than in the females of the 



'^ In the paratypes, three to four. 



MEM. AM. ENT. SOC, 4. 



