366 Annals of the Carnegie Museum. 



lower edges. Antennae with joints one to six largely pallid. Anterior 

 tibiae strongly infuscated; knees and apex along with the tarsi of the 

 middle legs and knees and most of the tibiae of the hind legs also infus- 

 cated; posterior metatarsus and tibial claws pale testaceous, the 

 former elongate-elliptical, moderately heavy, and rather closely fringed 

 below with strong elongate hairs, nearly three-fourths the length of 

 the claws. Hind femora marked with a narrow longitudinal line on 

 the outer disc of each. Tegmina dimly banded with ferruginous 

 and fuscous. Wings with the apical portion black. Abdomen black, 

 the apices of the segments rather widely pallid; the apical segments 

 similar to those in triJobata, but a trifle more robust. 



Length of body, 9 (?). 9 mm.; including the wings, 11.5 mm. 



Habitat. — The only specimen at hand, the type, comes from Cuyaba, 

 Brazil, where it was taken by H. H. Smith, in February. In the 

 Carnegie Museum. 



The pallid portions of this insect, except where otherwise stated, 

 are ferrugineo-testaceous. 



21. Rhipipteryx rivularia Saussure. 



Rhipipteryx rivularia Saussure, Biol. Cent.-Amer., Orth., I (1896), p. 212, pi. 11, 

 fig. 20; KiRBY, Syn. Cat. Orth., II (1906), p. 12. 



Habitat. — While the collections now being studied do not contain 

 specimens of the above species, there are several examples of it in the 

 author's collection which were taken on the Island of Trinidad. This 

 record, therefore, establishes a wider distribution for the species. 

 Specimens have also been seen by me which were taken in British 

 Guiana. 



22. Rhipipteryx brullei Ser\ ille. 



Rhipipteryx brullei Serville, Ins. Orth. (1839), p. 318; Saussure, Miss. Mex., 

 Orth. (1874), p. 357; Biol. Cent.-Amer., Orth., I (1896), p. 211, PI. 11, fig. 21; 

 KiRBY, Syn. Cat. Orth., II (1906), p. 12. 



Rhipipteryx mar ginatus Brulle, Hist. Nat. Ins., IX (1835), P- 198 {non Newman). 



Tridactylus marginnlus Percheron, Gen. Ins. Orth. (1834), PI. i. 



Xya nolala Burmeister, Handb. Ent., II (1838), p. 742. 



Habitat. — The collection contains a large series of this species, which 

 were taken during June by H. H. Smith. They come from Chapada, 

 near Cuyaba, Matto Grosso, Brazil. 



The variation in both size and color is \ery little, e\en less than is 

 usually to be observed in other species which arc known to adhere 

 'closely to the type-form. 



