NO. 1461. - LIST OF PARAGUAYAN LOCUSTS— BRUNER. 617 



backward to the knees, antero-lateral margin behind the frontal spine 

 very shallowly convexly excavate on each side, anterior carina behind the 

 front margin distinctly conv^ergent backward, in length not quite equal 

 to that of the eyes, median carina percurrent, substraight, little com- 

 presso-elevated, behind the spine anteriorlj- as far backward as the 

 sulci distinctly compressed, and barely elevato- arcuate forward. Elytra 

 elongate, acuminate forward, widest near the apex, and presenting a large 

 oval pale macula, occupying about a third of the elytral area posteri- 

 orly (probably smaller in the female); wings undeveloped. Femoral 

 margins entire, posterior femora stout, the superior margin arcuate, 

 the antegenicular denticle acute; posterior tibia? plurispinose, the 

 canthi minutely serrulate and little expanded toward the apex; the 

 first article of the posterior tarsi with the third pulvilli barely longer 

 than the first and second and straight below. 



Total length of body, 9 mm. ; pronotum, G.5 mm. ; posterior femora, 

 5 mm. 



Type.—C2it. No. 9755, U.S.N.M. 



Habitat. — Sapucay, Paraguay. W. T. Foster, collector. 



No specimens of this group are at hand, but the following-named 

 genera and species are known to occur in the region covered l)y the 

 present paper: 



TABLE FOR DETERMINATION OF GENERA. 



a. Fastigium of the vertex very narrow, scarcely or not at all projecting in advance 



of the eyes Eumasta.v Burr 



aa. Fastigium of the vertex wider and more or less projecting in advance of the 

 eyes Masyntes Karsch 



EUMASTAX Burr. 



This generic name has recently been suggested by Malcolm Burr " 

 in place of JIasta.e Perty, which had been used several years before 

 in Coleoptera. This being the typical genus of the subfamily necessi- 

 tated the changing of that name also. 



TABLE FOR DETERMINATION OF SPECIES. 



a. Apex of the vertex above the eyes, when viewed from the side, not visible. 

 Tegmina and wings fully developed. Posterior femora "irregularly black 

 spotted pardalina Burr 



aa. Apex of the vertex above the eyes when viewed from the side plainly visible. 

 Deflexed lobes of the protonum with the anterior angle obtuse. . versicolor Burr 



EUMASTAX PARDALINA Burr. 



Eumastax pardalina^ Burr, Essai sur les Eumastacides, p. 51. 

 This insect was described as coming from Paraguay. 



«Anales de la Sociedad Espaiiola de Historia Natural, XXVIII, 1899. 



