Bruner : South American Locusts. 429 



14. Paurotarsus amazonus Hancock. 

 autosomes Hancock, Psyche, IX, pp. 42—43, figs, la-id (1910); In., 

 ra tns., Fasc. 48, p. 71, fig. 26 (1906). 



Habitat.— The only specimen at hand, a female, was collected by 

 J. D. Haseman. It bears the label "Rio Machupo, n<'ar Rio Guapore, 

 Bolivia," and was taken August 29, 1909. 



Family KIM ASTACID/E. 

 Genus Scirtomastax Saussure. 



Scirtomastax Savsscrk, Rev. Suisse de Zool., XI, p. 97 (1903); Birr, M., Genera 

 Ins., fasc. 15, p. 16 (1903). 



This tropical American genus of locusts was erected by Dr. Henri 

 de Saussure for the reception of an apterous Eumastacid coming 

 from Ecuador. Later Dr. Malcolm Burr referred two others there, 

 viz. Eumastax surinama and E. rosenbergi. Now a single female 

 representative of what would seem to be a fourth species is at hand 

 from eastern Brazil. These insects may be separated by the annexed 

 table. 



Synopsis of tii 1; Simcciks ok Scirtomastax. 

 A. Entirely apterous. 



b. Brownish or testaceous. Antennae black; sides of head black with post- 

 ocular yellow band Cordillera Saussure. 



bb. Olivaceous. Antennae pallid; sides of head concolorous and without the 



yellow band back of eyes brasiliensis sp. nov. 



A A. Tegmina present but rudimentary. Wings wanting. 



b. Color entirely fuscous. Pronotum behind gently triangulately emarginate, 



the median carina present surinama Burr. 



bb. Color fuscous, but with the pronotum ferruginous. The latter behind 

 roundly emarginate, its median carina absent rosenbergi Burr. 



15. Scirtomastax brasiliensis sp. nov. 



Entirely apterous. Most nearly related to S. cordillerce Saussure, 

 but differing from that insect slightly in dimensions and quite markedly 

 in color. 



Insect fairly slender. Head large; vertex subangulate, a little 

 ad winced beyond the upper extremity of the eyes; frontal costa 

 sulcate throughout, of about equal width at upper and lower ex- 

 tremities and at the ocellus, but narrowed between, the lateral walls 

 of equal prominence throughout. Antennae robust, clavate, a little 

 shorter than the anterior femora, pallid throughout as compared to 



