124 
BRAZILIAN ORTHOPTERA 
The species is now known to range as far south as Las Palmas, 
Chaco, Argentina and t''anta Cruz de la Sierra and Puerto Suarez, 
Bolivia, west to the Rio Pacaya, Peru, east to Piauhy, Brazil and 
north to Colomliia and Venezuela, and through the West Indies, 
occurring also in eastern Georgia. 
Tridactylus apicialis Say 
1825. T[ridactylus] apicialis Say, Journ. Acad. Nat. Sci. Phila., iv, p. 310. 
[“St. John’s River, in east Florida and on the Missouri, as far as Council 
Bluff.’’] 
Igarape-assii, Para. (H. S. Parish.) One female. 
Rio Madeira, five hundred miles from mouth. (Mann and 
Heath.) Twelve males, ten females, seven immature males, one 
immature female. 
These specimens have been the object of a considerable amount 
of comparison and tabulation, with consideration from different 
view-points of the problems they present. The conclusions 
reached are best presented serially. The first important point 
is that the Igarape-assu female is absolutely indistinguishable 
from average North American specimens of that sex. The next 
is that the Rio Madeira series, which has been dried from alcohol 
and consequently has its coloration affected and doubtless has 
shrivelled to a certain degree, as a whole is appreciably smaller 
than North American specimens of the species. The third is 
that the metatarsi of the caudal limbs average longer, in propor- 
tion to the principal spurs, in the Rio Madeira individuals than 
in North American specimens. The fourth, instability in genital 
features, generally used diagnostically, is proven by the series 
now available for study. 
We will discuss the last three of these conclusions as briefly 
as possible. Relative to size, it is evident from the examination 
of series from North American localities that size variation is 
decided. It is known to be individual and probably is, to a cer- 
tain degree, geographic. The present Rio Madeira series was 
doubtless taken in a circumscribed area and the individuals were 
in all probability subject to identical control influences. These 
specimens have also been dried from alcohol, a process almost in- 
variably productive of some shrinkage. The Igarape-assu female 
is of similar size to the average of North American material. 
