1869.] 331 [Scudder. 



pallid at the sides, above variegated witli pallid and dark fuscous, the 

 veins sometimes of one, sometimes of the other color; wings pellucid, 

 the costal border and spaces exposed in folding, discolored. Legs 

 pallid, blotched with dark fuscous; the hind femora very stout, the 

 hind tibiae abundantly armed with long spines. Anal cerci very 

 long, stout at base, rapidly tapering, dusky, furnished with long 

 hairs; ovipositor scarcely exserted. Length of body .44 in.; of an- 

 tenna 1.25 in.; of tegmina .34 in.; of wings .62 in.; of hind femora 

 .28 in.; of anal cerci .22 in. One ?. Napo or Maraiion. 



2. Platydactylus fasciatus nov. sp. 



Pale testaceous, the prothorax darker; head with a dusky line 

 bordering the antennas and the ey6s; first joint of antennjB testa- 

 ceous, beyond black ; eyes large, globose, pyriform. Tegmina longer 

 than body, testaceous with fuscous veins, the inner half with seven or 

 eight obscure, oblique, fuscous bauds nearly as broad as the spaces 

 between ; wings longer than tegmina, pellucid or slightly clouded, the 

 costal* edge fuscous, an obscure clouded longitudinal space at the 

 apex near the bottom of the median field. Abdomen blackish above ; 

 ovipositor reddish, black at tip and on the side along the median line ; 

 at base curved strongly upwards; beyond bowed slightly in a reverse 

 direction; anal cei'ci stout, j^ale, hairy. Length of body .85 in.; of 

 tegmina 1.05 in.; of wings 1.27 in.; of ovipositor .62 in. One ?. 

 From Napo or Mar anon. 



3. Trigonidium gracile nov. sp. 



Vertex of head fusco-luteous, front blackish, mouth part pale; 

 basal two joints of antennas blackish, beyond pale. Pronotum fusco-lu- 

 teous, marked with fuscous; abdomen blackish fuscous. Tegmina 

 dark luteous, nearly as long as the abdomen, wiuga blackish, with 

 luteous veins, reaching far beyond the tegmina. Legs very slender, 

 pale, the hind tibise with very long and slender spines on the apical 

 half. Ovipositor reddish brown, blackish along the middle, falciform, 

 slightly swollen at the middle, the tip upturned rather sharply and 

 terminating in a very fine point ; anal cerci very long and slender, 

 the basal third pale, beyond fuscous. Length of body .17 in.; of 

 wings .26in.; of hind tibias .16 in.; of anal cerci .055 in.; of ovipositor 

 .07 in. One ?. Napo River. 



LOCUSTARI^. 



4. Steirodon quadratum nov. sp. 



Head dark brown, sides of front paler; base of labruni black, lobe 

 whitish; mandibles whitish; vertex dark brown, a band above 



