1921] NATURAL SCIENCES OF PHILADELPHIA. 279 



tal margin. Pronotum Avith disk broadly and very weakly convex, 

 the comparatively narrow lateral portions weakly declivent; pro- 

 notum triangular in shape with angles broadly rounded; the lateral 

 margins diverging from the head to the latero-caudal angles, these 

 and the transverse caudal margin nearly straight, very feebly con- 

 vex; greatest width at latero-caudal angles. Tegmina and wings 

 fully developed, extending well beyond cereal apices, narrower but 

 showing similar venation to those of the species of Nyctihora. Dor- 

 sal surface of abdomen with median segment showing transverse 

 median depression, formed by the fusion of two circular tlepressions, 

 this depression partially filled with a pale substance which, in drying, 

 has become hard, like shellac. Fourth, sixth, and eighth tergites, with 

 latero-caudal angles alone produced and rounded. Supra-anal 

 plate bluntly triangularly produced, median portion depressed, 

 this area forming a distal longitudinal subchitinous area terminated 

 distad as the broadly convex apex of the plate, the chitinous portion 

 on each side terminating in a large, stout, straight, elongate spine, 

 directed caudad.^"* Subgenital plate deplanate, with lateral por- 

 tions narrowly bent dorsad as far as insertion of styles, the lateral 

 portions straight in ventral aspect and moderatelj^ convergent to 

 the broad and very weakly convex apex; sinistral style proximad, 

 springing from a point beneath base of sinistral cercus, straight, 

 cylindrical, tapering to its rounded apex and slightly over three 

 times as long as its basal width, lying along margin of plate; dextral 

 style springing from dextro-distal angle, similar, but only half as 

 large and only slightly over twice as long as its basal width, like- 

 wise lying along margin of plate. Cephalic femora armed in dis- 

 tal third of cephalic margin with (five to ten in the series) small, 

 stout spines, terminating in three large spines, more elongate in in- 

 creasing ratio distad ; ventro-caudal margin armed in corresponding 

 portion with (three or four) heavy, elongate spines. Ventro- 

 cephalic margins of other femora armed only distad with (one to 

 five in the series) small, stout, irregular spines; ventro-caudal mar- 

 gins well-supplied with stout and elongate spines. Caudal metatar- 

 sus unarmed; four proximal tarsal joints supplied with large pul- 

 villi. Large chitinous arolia present between the nearly symmetri- 

 cal, simple tarsal claws. Important features of coloration given 

 below. 



Allotype: 9 ; same data as type. [Paris Museum.] 

 Agrees closely with male except in the following characters. 

 Eyes smaller, but with interocular space no wider. Pronotum 

 broader, with lateral margins slightly more convex. Tegmina and 

 wings reduced, reaching meso-distal portion of abdomen. Abdo- 

 men with dorsal surface unspecialized. Supra-anal plate hairy, 

 half as long as width between cerci, produced between these, the 



^"^ These spines similar to those found in lineata, but with depressed and sub- 

 chitinous intervening area distinctive. 



