NO. 1461. LIST OF PARA a UA YAN LOCUSTS— BR UNER. 621 



The insects belonging to this subfamily are much more numerous 

 than are those of any of the preceding subfamilies; and, in some 

 instances, become sufficiently numerous to be classed as destructive. 

 The genera named in the following table are known to occur in Para- 

 guay. Two of these genera are herewith described for the first time, 

 while a few of the species are also made known to science in this paper. 



TABLE FOR DETP^RMINATION OF GENERA. 



a. Foveolse of vertex below or absent. Face usually very oblique. 

 6. Antenna? with the joints depressed, more or less ensiform. 

 c. Wings of male more or less broadly fenestrate. 

 d. Sides of the fastigiiuii strongly rounded, the apex not acuminate. Tegmina 

 acuminate or decidedly obliquely truncate. Posterior femora with the 

 apical angles horizontally produced, acuminate. 

 e. Head conical, face moderately oblique. Foveote of the vertex indistinct, 

 triagonal. 

 /. Vertex longer than the eyes. Tegmina of male broader than the length 

 of the pronotum. Wings of male very broadly fenestrate. 



Hyulopteryx Charpenlier 

 ff. Vertex shorter than the eyes. Tegmina of male narrower than the 

 length of pronotum. Wings of male less broadly fenestrate. 

 g. Tegmina obliquely truncate at apex; wings hyaline and more or less 

 infuscated. Pronotum with the lateral carinse continuous uninter- 

 rupted. 



h. Larger, general color green Tnixalis Linna?us 



hh. Smaller, general color testaceous or ferruginous Orphula Stal 



gg. Tegmina acuminate, wings tinted with dilute red. Pronotum with 



the lateral carin;^ interrupted Euh-yralis Bruner 



dd. Sides of the fastigium straight or but gently rounded, the apex more or 

 less acuminate. Tegmina broadly rounded or somewhat truncate. Pos- 

 terior femora with their apical angles roundly deflexed. 

 e. Fastigium of the vertex above depressed; without a longitudinal carina. 

 /. Lateral carinse of pronotum more or less converging near the middle. 

 The sides of pronotum compressed; tegmina and wings fully de- 

 veloped. 

 g. Wings tinted with yellowish-brown; the tegmina rather broad, their 



apex somewhat ol)li(juely truncate Parorphida Bruner 



gg. Wings transparent or infuscated, the tegmina narrower, their apex 



rounded. 



h. Interspace between the mesosternal lobes distinctly longer than 



wide. Head and pronotum subequal in length. Frontal costa 



distinctly sulcate throughout. Front greatly oblique. Lateral 



cariufe of pronotum subparallel in advance of the posterior 



sulcus OrphuUna Giglio-Tos 



hh. Interspace between the mesosternal lobes about as wide as long. 

 Head shorter than the pronotum. Front less strongly oblique. 

 Frontal costa scarcely sulcate below the ocellus. Lateral 

 carinpe of the pronotum divergent or arculate in advance of 



the hind sulcus Orphulella Giglio-Tos 



ff. Lateral carinae of pronotum not converging near the middle. The 

 sides of pronotum not compressed. Tegmina and wings usually 

 more or less abbreviated Dichromorpha Morse 



