NO. U6\. TJST OF PA AM G UA YA N LOCUSTS— BR UNER. 681 



cc. Color dark olive brown in male. Hind tibiae 11-12 spined in outer row. 



Mexico auriventris Bruner 



aa. Median carina of vertex less prominent. Last transver.«e sulcus of pronotum 

 situated about the middle. 

 //. Hind tibije provided with 15-19 spines in outer row. 



r. Rather robust. Color variable. Costa Riean costaricensis Bruner 



cc. More slender. The color more uniform. Mexico southerly. 



(/. Anterior portion of disk of pronotum narrower than the hind portion; 

 lateral carin;e in males concolorous; disk and sides not decidedly infus- 



cated mystica Saussure 



dd. Anterior portion of disk of pronotum about equal to the width of hind por- 

 tion; lateral carinse in males pale, the disk and sides infuscated. 



ingenita Bruner 



bb. Hind tibipe provided with but 14 spines in outer row. Eastern United States 



southward occidentalis Saussure 



AMBLYTROPIDIA FERRUGINOSA StSl. 



Amblytropidia Jerruginosu StAl, Recens. Orthoj)!., I, 187H, ]i. 107. — Bruner, 

 Biol. Cent. Amer., Orthopt., II, 1904, p. 63. 



Habitat. — ^According- to Giglio-Tos« this .species occurs in Paraguay 

 at various localities. The collections do not contain specimens of it. 



AMBLYTROPIDIA AUSTRALIS Bruner. 



Amhlytropidia auslralis Bruner, Biol. Cent. Amer., Orthopt., II, 1904, pp. 62,64. 

 Amblytropidia ferruginosa, Gic;lio-Tos. , Boll. Mus. Zool. Anat. Torino, IX, 1894, 

 No. 184, p. 13; XII, 1897, No. 302, p. 25. 



Habitat. — Specimens of this insect are at hand from Asuncion 

 (Bruner) and Sapuca}^ (Foster). It is more common southward in 

 Argentina and Uruguay. 



AMBLYTROPIDIA VITTATA Giglio-Tos. 



Amblytropidia vittata Giglio-Tos, Boll. Mus. Zool. Anat. Torino, IX, 1894, No. 

 184, p. 13. 

 Habitat. — Luque, Paraguay (Giglio-Tos); specimens are at hand 

 from Sao Paulo, Brazil. 



AMBLYTROPIDIA ROBUSTA, new species. 



A variable in.sect as to general color, in which the two sexes differ 

 greatly in size and comparative robustness. Male slender, ruf o-testa- 

 ceous, with fuscous knees; female robu.st, varying from pale testa- 

 ceous to dark brown, the dorsum sometimes uniformly green, the knees 

 concolorous. 



Head of moderate size, about as wide as front edge of the pronotum, 

 the occiput and vertex somewhat rugose, the latter short and provided 

 with a well-defined longitudinal carina; frontal costa prominent and 

 unusually broad, slightly expanding below and continuous to the 

 clypeus, in the male punctate and decidedly sulcate, in the female 

 smooth and faintly sulcate. Antennae filiform, not quite as long 



«Boll. Mus. Zool. Anat. Torino. 



