398 Annals of the Carnegie Museum. 



These insects are very small, averaging lo mm. to the tips of the 

 wings, which are no longer than the narrow tegmina. Basal antennal 

 joints as described in the synoptical key. 



65. (Ecanthus argentinus Saussure. 



CEcanthiis argentinus Saussure, Miss. Mex., Orth. (1874), p. 460; Biol. Cent.-Amer., 

 Orth., I (1897), p. 253; Kirby, Syn. Cat. Orth., II (1906), p. 74. 



Habitat. — While the collections now at hand do not contain speci- 

 mens which can be referred to this species, it is quite certain that the 

 species belongs to tropical and subtropical America. It may be 

 recognized by the form of the dusky antennal markings of the basal 

 antennal joints, i. e., the line and dot on the first and the dot on 

 the second. 



66. CEcanthus lineolatus Saussure. • 



CEcanlhus lineolatus Saussure, Biol. Cent.-Amer., Orth., I (1897), p. 254; Kirby, 

 Syn. Cat. Orth., II (1906), p. 75. 



Habitat. — A single male specimen from Chapada, Brazil, is placed 

 under this name. It was taken in May, presumably by H. H. Smith. 



67. CEcanthus tenuis Walker. 



(Ecanthus tenuis Walker, Cat. Derm. Salt. B. M., I (1869), p. 95; Saussure, Miss. 

 Mex., Orth. (1874); p. 461; Kirby, Syn. Cat. Orth., II (1906), p. 75. 



Under this name I am including several specimens, which vary 

 considerably among themselves in size, comparative length of thorax, 

 etc. They all agree, however, in having the two basal joints of their 

 antennae provided below with a slender median longitudinal line of 

 black. Possibly Walker's three so-called species varicornis, tenuis, 

 and peruviamis would be included. This can only be decided by a 

 careful study of his types together with a large series of specimens of 

 both sexes from various South American localities. 



Habitat. — The material just referred to is represented as follows: 



Three females and one male, Chapada, taken during the months of 



April and May; a single female from Rio de Janeiro, October (H. H. 



Smith); a female bearing the label "Rio Bermejo, Prov. of Salta, 



Argentina, 400 M. Steinbach," May, 1914, Carnegie ]\Ius. Ace. 5229. 



68. CEcanthus sp.? 



In addition to the above there is before me and apparently belonging 

 to the same collection a single male without locality label, but with 



