JAMES A. G. REHN 225 



This specimen differs from the original description of the species 

 in having the palpi entirely black, the femora blackish dorsad 

 and the cerci almost entirely black. Otherwise the present indi- 

 vidual is completely in accord with Walker's description. 



Ischnoptera amazonica new species (Plate XIV, figs. 4, o, 0, 7 and 8.) 



This species is related to I. ruhiginosa Walker, known from 

 Santarem, Brazil and British Guiana. From ruhiginosa the 

 present species differs in the somewhat larger size, more diffuse 

 and less contrasted color pattern, proportionately more elongate 

 tegmina and wings, narrower interspace between the eyes, less 

 transverse elliptical pronotum and very different male genitalia. 



Apparently there is some relationship to /. taczanowskii Bolivar, 

 from the western coast region of Peru, but a number of features 

 of differences can be noted in the description. 



Type. — 6^; Igarape-Assu, State of Para, Brazil. (H. S. Par- 

 ish.) [Acad. Nat. Sci. Phila., Type no. 5318.] 



Size medium: form elongate elliptical, depressed. Head projecting but 

 little cephalad of the pronotum: interspace between the eyes narrow, no greater 

 than that between the ocelli and twice as wide as the proximal antennal joint : 

 ocelli reniform: eyes large, their greatest depth cephalad distinctly less than 

 the interspace between them: palpi with third and fifth joint subequal in 

 length, the former relatively slender, subcylindrical; fourth joint faintly 

 shorter than the third joint, moderately conical; fifth joint relatively deep 

 proximad, tapering, subcompressed : antennae exceeding the body in length. 

 Pronotum broad elliptical, moderately transverse, the greatest length con- 

 tained one and one-third times in the greatest width of the same, greatest 

 width situated slightly f audad of the middle: cephalic margin arcuato-trun- 

 cate; latei'o-cephalic angles very slight and broadly rounded obtuse; lateral 

 margins strongly arcuate; latero-caudal angles obtuseh' rounded; caudal 

 margin gently obtuse arcuate: disk with paired distinct obliquely diverging 

 impressions: lateral portions of pronotum moderately deflected. Tegmina 

 surpassing the apex of the abdomen by nearly the length of the pronotum, 

 elongate, margins in large part subparallel, the greatest width at distal third: 

 costal margin moderately arcuate in proximal third, thence straight except 

 for a short distal arcuation to the apex, which is faintly nearer the costal than 

 the sutural margin; sutural margin straight exce])t in distal third, where it is 

 moderately arcuate to the apex: marginal field relatively short and narrow; 

 scapular field moderately broad, subetiual; anal field very elongate pyriform, 

 reaching to two-fifths the entire length of the sutural margin from the base: 

 costal veins eighteen to twenty in number, occasionally (particularly distad) 

 bifurcate; median vein bifurcate slightly proximad of the middle; ulnar vein 

 with four rami, all diverging mesad on the sutural side, all reaching the apical 

 margin, except a bifurcation of the proximal one, which reaches the sutural 

 margin slightly short of the apical margin. Wings reaching to (or faintly 



TRANS. AM. KNT. SOC, XLII. 



