16 



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

 veins sometimes of one, sometimes of the other color; %rings pellucid, 

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

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

 hind tibiua 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- 

 tennaa 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. Platydaetylus fasciatus nov. sp. 



Pale testaceous, the pro thorax darker; head with a dusky line 

 bordering the antennas and the eyes; first joint of antennae 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 bands 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 cerci stout, pale, hairy. Length of body .85 in.; of 

 tegmina 1.05 in.; of wings 1.27 in.; of ovipositor .G2 in. One 9. 

 From Napo or Maranon. 



3. Trigonidium gracile nov. sp. 



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

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

 teous, marked with fuscous; abdomen blackish fuscous. Tegmina 

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

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

 pale, the hind tibite Avith 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 .2Gin.; of hind tibiae .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 labrum black, lobe 

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



