130 Annals of the Carnegie Museum. 



Length of body, a 71 , 24 mm., 9 , 29-30 mm.; of pronotum, cf , 5.75 

 mm., 9, 7.35 mm., of tegmina, o 71 . 19 mm., 9, 25 mm.; of hind 

 femora, o 71 , 13.5 mm., 9 , 18 mm. 



Habitat. — Southern portion of the province of Santa Fe, northern 

 Buenos Aires, Entre Rios, etc., in Argentina. 



Whether or not this form is sufficiently distinct to warrant the 

 making of a separate species, I cannot say. Some of the differences 

 mentioned in the description are quite important, but others are not. 

 The larger size and more robust build of the temperate region form is 

 an extraordinary feature, as compared with the smaller and less robust 

 stature of the tropical form. 



Genus Dichroplus Stal. 

 Dichroplus Stal, Recens. Orthopt., I, p. 78 (1873). 



"Many of the insects which comprise this extensive genus are very 

 closely related to one another in their general appearance, and the 

 comparatively few forms, which have thus far been noted by entomolo- 

 gists, have been so briefly described, that it is a little doubtful as to 

 the identity of all of them. This is especially true when the student 

 is limited in the material that is accessible for study. With com- 

 paratively few exceptions, the members of the genus are confined to 

 regions south of the equator in South America, with Paraguay and 

 northern Argentina as the center of their distribution. This being 

 true, most of the species may be expected to occur in the country now 

 under consideration. Specimens of at least seven distinct species 

 are at hand. 



180. Dichroplus fuscus (Thunberg). 



Gryllus fuscus Thunberg, Mem. Acad. Petersb., V, p. 235 (1815). 

 Pezotettix (Trigonophymus) fuscus Stal, Recens. Orthopt., I, p. 78 (1873). 

 Dichroplus fuscus Giglio-Tos, Boll. Mus. Zool. Anat. Torino, IX, no. 184, p. 21 



(1894). 



Habitat. — There are several specimens at hand, including both 

 sexes. They were collected at Chapada, Brazil, during the months of 

 May and July by H. H. Smith. 



181. Dichroplus gracilis sp. no v. 

 Of about the size and general appearance of D. punctulatus Thun- 

 berg, but very distinct from that species in a number of its structural 

 features. Sides of pronotum without the usual dusky bar, hind 

 femora beneath and internally bright blood-red, fuscous bands reduced 



