658 PROCEEDINGS OF THE NATIONAL MUSEUM. voi„ xxx. 



robust and l)elonging to North America, and represented ))y L. inargln i- 

 eoUl.s; the other more slender and belonging to South America, with 

 L. JilifoTmis as a t^'pe. There are at least four readily separable 

 forms of the latter group before me as I write. They may be sepa- 

 rated by the accompanying kej^: 



TABLE FOR DETERMINATION OF SPECIES. 



a. Apex of male abdomen simple, acuminate. Hind tibia' with numerous (11 to 17) 

 );ipines in outer row. Sides of head, pronotum, and pleura with a decided nar- 

 row ferruginous or piceous band. 

 h. Larger (male 27 mm. long). Hind tibifc 17-spined. [Central Argentina.] 



argentina, new species 

 bh. Smaller (male 25, female 30-.S2 mm. long). Hind tibise 11-spined. [Sao 



Paulo, Brazil. ] gracilis, new species 



act. Apex of male abdomen complex, provided with two rather widely separated, 

 backward projecting, slender fingers, l)etween and above which there is a 

 large contorted process. Hind tibi<e with 7 to 11 spines in outer row. Sides 

 of head, pronotum, and pleura less <lecidedly piceous-banded. 



h. Smaller and slenderer (male 30, female 83-37 mm. long) Jilifarmis (Serville) 



hl>. Larger and more robust (male 33, female 40-43 mm. long) . .obscunt (Thunberg) 



LEPTYSMA FILIFORMIS (Serville)? 



There are 4 males and 4 females before me from Sao Paulo, Brazil, 

 which are placed here. I am not quite sure, however, of the deter- 

 mination, although the measurement agrees with that given by Ser- 

 ville in his description of the species. This insect is credited to 

 Paragua}' by Giglio-Tos, and to Argentina by Stal. 



LEPTYSMA OBSCURA (Thunberg)? 



There are a number of specimens (4 males and Id females) in the 

 National collection from Sapucay, Paragua}^ These were collected 

 by W. T, Foster. The writer also collected in Paraguay, when several 

 specimens of both sexes were taken at San Bernardino. All of these 

 are larger and somewhat more robust than those referred to above as 

 possibly being L. Jjl'iforinis Serville. They have accordingly been 

 placed under Thunberg"'s ohf<eura. 



LEPTYSMINA Giglio-Tos. 

 LEPTYSMINA PALLIDA Giglio-Tos 



Plate XXXVni, fig. 1. 



Leptjismina pallida Giglio-Tos, Boll. ^lus. Zool. Anat. Torino, IX, 1S94, No. 1S4, 

 p. .35. 



TIahltat. — Although this insect is not represented in tiie collections 

 at hand, nt)r seems to have been reported from Paraguayan territorj-, 

 it was originally described from Kesistencia. Argentina, almost on the 

 l)orders of Paraguay. It is (juite sure to be taken later. The writer 

 has a specimen, presumably of this species, taken by himself at Vic- 

 toria. Brazil. 



I 



