Bruner: Tropical American Tettkionoidea. 387 



the species as regards the structure of the ovipositor as well as the 

 fastigium of the vertex, as may be noticed in the synoptical key which 

 is subjoined. About a dozen species have been recognized, one of 

 them being here described as new. 



Synopsis of the Species of Eriolus. 

 A. Mesosternal lobes on both sides in front produced into an erect spine. Ovi- 

 positor with the apex obtuse spiniger Redtenbacher. 



A A. Mesosternal lobes smooth, not provided in front with erect spines. Ovi- 

 positor variable. 

 b. Fastigium of the vertex plain, or flattened above, its apex rounded. Pro- 



notum produced behind [Costa Rica] longipennis Redtenbacher. 



bb. Fastigium of the vertex rounded above, the apex more or less acuminate. 

 Pronotum not produced behind. 

 c. Genicular lobes of the posterior femora acutely produced. The tegmina 

 longer (23-37 mm.). 

 d. Ovipositor with the apex not acute, the apex either rounded or 

 obliquely truncated. 

 e. Ovipositor with the apex of the upper valve rounded. Tegmina 

 longer (34-37 mm.) [Island of Jamaica]. . .jamaicensis sp. nov. 

 ce. Ovipositor with the apex of the upper valve obliquely truncated. 

 /. Tegmina shorter (9,25 mm.) [S. America ?]. 



frater Redtenbacher. 



ff. Tegmina longer ( 9 . 28-31 mm.) [Central America and Mexico]. 



g. Fastigium of the vertex acute. Anterior femora in front 



four-spined [Mexico] mexicanus Saussure. 



gg. Fastigium of the vertex blunt. Anterior femora six-spined . 

 [Guatemala, Panama]. . . . consobrinus Saussure & Pictet. 

 dd. Ovipositor with its apex acute. 

 e. Front unicolorous, pallid. 



/. Ovipositor longer (10.5 mm.), somewhat dilated back of its 



middle [Cuba] caraibens Bolivar. 



ff. Ovipositor shorter (5.5-6.5 mm.), not dilated back of its middle. 

 g. Anterior femora below unarmed. Tegmina very slender, 

 tapering to the apex [Panama]. 



aciUipennis Saussure & Pictet. 

 gg. Anterior femora below four-spined. Tegmina graceful, 

 but not remarkably slender [Guatemala]. 



falcatus Saussure & Pictet. 



ee. Front with a large black maculation [Brazil]. . .nigrifrons Karny. 



cc. Genicular lobes of the posterior femora but little produced, not slenderly 



acute. 



b. Tegmina a little surpassing the tip of the abdomen, narrowed 



towards their apex [Guatemala] brevipennis Redtenbacher. 



bb. Tegmina not surpassing the tip of the abdomen, the apex rounded. 

 [Espirito Santo, Brazil] tninimus Karny. 



