148 PROCEEDINGS OF THE ACADEMY OF [May^ 



costal margin straight oblique proximad, very gently arcuate distad, 

 with a faint flattening at the middle of the arcuation: anterior field 

 very broad, broadly rounded distad; intercalated triangle distinct 

 but small: costal veins eleven in number, in general regularly oblique^ 

 simple and non-clavate; medio-discoidal area in general faintly wider 

 than the medio-ulnar area, divided into moderately regular, subquad- 

 rate areolse by thirteen cross-veins; median, vein simple, direct, un- 

 branched; medio-ulnar area with similar but less numerous and more 

 oblong areolae; ulnar vein with two complete and seven incomplete 

 rami; axillary vein with two rami. Sixth and seventh dorsal ab- 

 dominal segments with the structure characteristic of Ischnoptera:^ 

 supra-anal plate large, semi-ovate, very shallowly arcuato-emarginate 

 mesad; slightly sinuate near the cereal bases, peripheral margin and 

 its vicinity with scattered, erect hairs; ventral surface of the plate 

 with a long dextral, subchitinous tooth, which is directed meso- 

 ventrad: cerci moderately elongate, fusiform, depressed, apex nar- 

 rowly blunted; subgenital plate moderately asymmetrical, sinistral 

 portion of plate arcuate-emarginate ventrad of the cercus, mesal 

 portion of plate similar, the area between obliquely sinuato-truncate, 

 the sinistral style situated sinistrad on the same section, dextral side 

 of the plate deeply rectangulate-emarginate, the dextral style situated 

 on the apex of the rounded lobe between the median and dextral 

 emarginations ; styles short, thick, fusiform, unequal, with distal 

 extremity arcuate aciculate; margin of the plate closely haired, dorsal 

 surface of the subgenital plate having at the base of the dextral style 

 a lamellate, suberect, subchitinous process, the free margin of which is 

 unequally bilobate. Cephalic femora armed ventro-cephalad with a 

 typical Ischnoptera spine arrangement.'' 



General color blackish brown, the trochanters, ventral surface of 

 the femora, dorsal surface of the tibiae and flecks on the tarsi ochrace- 

 ous-buff. Head with the interocular region faintly reddish; eyes 

 black; ocelli naples yellow. Pronotum with the margins, except 

 for the median section of the caudal margin, narrowly ferruginous. 

 Tegmina with the marginal field and an evanescent edging of the 

 scapular field light ochraceous buff. Wings infumate. 



Length of body, 7.6 mm.; length of pronotum, 2.3; greatest width 

 of pronotum, 3; length of tegmen, 7.6; greatest width of tegmen, 2.4. 



The type is unique. 



6 See Hebard, Trans. Amer. Entom. Soc, XLII, p. 339 to 340, pis. XVI and 

 XVII, (1916). 



7 See Hebard, Trans. Amer. Entom. Soc, XIJI, p. .340, pi. XVII, fig. 1, (1916). 



