20 Annals of the Carnegie Museum 



varied with Hecks and bands of pale testaceous on face, occiput, sides 

 of pronotum, and pleura in the usual patterns common to representa- 

 tives of this and related genera. The tegmina also bear traces of 

 pale and dark flecks along the disk. The lower outer carina of femora 

 is also alternately pallid and infuscated; the tibiae are pale cinereous 

 and more or less flecked with brown. Very likely this species, like 

 many of its congeners, will be found to vary greatly in color. 



Genus Linoceratium Bruner. 



Linoceratium Bruner, Biol. Cent. Amer,, Orthopt., II, pp. 31, 84 (1902, 1904). 



A tropical American genus of Locusts related to Orphulella, only- 

 two species of which are known. 



23. Linoceratium australe sp. nov. 



Very similar in size and appearance to L. boucardi Bruner, but 

 differing from that insect in the form of the lateral carinae of the 

 pronotum, the more equal size of the sexes, and in the present species 

 lacking the infuscation on the genicular region of the hind femora 

 and tibiae, which is so marked in boucardi. 



Length of body, cf, 13.5 mm., 9, 17 mm.; of pronotum, o 71 , 2.5 

 mm., 9 , 3 mm.; of tegmina, cf, 13 mm., 9,15 mm.; of hind femora, 

 cT , 8.77 mm., 9 , 10 mm. 



Habitat. — Corumba, Brazil, March to May, several specimens of 

 both sexes bearing the number 2120 (H. H. Smith). The types are 

 in the collection of the Carnegie Museum. 



The two species of the genus Linoceratium thus far known may 

 be separated as follows: The first is the type of the genus. 



A. Lateral carinae of the pronotum in advance of the principal sulcus, gently 

 arcuate. Genicular area of the hind femora infuscated. [U. S. of Colombia 



and Central America.] boucardi Bruner. 



A A. Lateral carinas of the pronotum in advance of the principal sulcus straight, 

 gently convergent posteriorly. Genicular area of hind femora without 

 infuscation. [Corumba, Brazil.] attstrale sp. nov. 



Genus Orphulina Giglio-Tos. 

 Orphulina Giglio-Tos, Boll. Mus. Zool. Anat. Torino, IX, No. 184, pp. 8, 9 (1894). 



This is another of the tropical American truxaline genera of locusts, 

 which occurs in the region covered by the present paper. 



