622 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxx. 



(f. Fstigium of the vertex above rounded, provided with a logitudinal 

 carina. 

 /'. Wings with tht> anterior ulnar vein branched at h>ase. Antenme long, 



clavate in the male. Wings red and black Toxopterus Bolivar 



jf'. Wings with the anterior ulnar vein not branched at base. Antennse 

 long, not clavate in male. Wings hyaline, more or less tinted with 



carmine at base Fenestra Brunner 



cc. Wings of male not fenestrate, the radial veins not incrassate and constricted 

 on apical third. Pronotum with lateral carinse gently diverging posteri- 

 orily; and with a pair of supplemental carinje on disk. Antennse sub- 



ensiform. Front strongly oblique Sinipta Stal 



/'//. Antennae filiform. Lateral carina? of pronotum parallel; supplemental carinie 



absent Amblytropidia Stal 



aa. FoveoljB of vertex visible from above, always present. Face usually more 

 nearly vertical than in the alternate category. 

 //. Inner apical spurs of hind tibiae subequal in length. Antennje, at least of male, 

 nearly or quite as long as hind femora. 

 c. Wings colored. Basal joints of antennae depressed. Lateral carinae of pro- 

 notum converging toward the middle. Tegmina without trace of intercalary 



vein Dich roatettix Bruner 



cc. Wings transparent. Basal joints of antennse not depressed. Lateral carinie 

 of pronotum nearly parallel. Tegmina with the intercalary vein more 

 or less plainly developed. 

 d. Pronotum provided with lateral carinte, which are interrupted in the mid- 

 dle. Valves of the ovipositor of normal type Staurorhectus Giglio-Tos 



dd. Pronotum entirely without lateral carinae. Valves of the ovipositor very 



blunt Amblyscapheus, new genus 



fill. Inner apical spurs very unequal in length. Antennfe of neither sex anywhere 



near as long as hind feihora. 



c". Lateral foveol;e of the vertex well develojied, once and a half to twice as long 



as broad. 



d. Lateral carina' interru[)ted in the middle, strongly divergent both in front 



and behind. The inner claws of hind tibia' fully twice the length of the 



outer one. Wings of female fully developed Stirapleura Scudder 



dd. Lateral carinpe of the pronotum not interrupted, but gently divergent in 

 front and behind. Inner claws of hind tibia? less than twice the length 

 of outer. Tegmina and wings of the female abbreviated. 



Melosci)iui<, new genus 

 cc. Lateral foveoUe of vertex o))scure, linear. Lateral lobes of pronotum with- 

 out raised line or carina. 

 d. Larger. Lateral carini« i>f pronotum more or less interrupted between 

 anterior and j)osterior sulci; diverging strongly anteriorly and poste- 



riorily Plectrotetti.r ^McNeill 



dd. Smaller. Lateral carinse of pronotum but little or not at all interrupted: 

 divergent but little Euplectrotettix Bruner 



HYALOPTERYX Charpentier. 



The geniLs ILyaloptcryj' of which 1[. i-ujipvtmixi Charpentier its the 

 type, occurs in the southern part of tropical South America, where it 

 is represented )>v several species. 



The material collected by W. T. Foster, at Sapucay, contains 5 males 

 and 10 females of this genus. Instead of agreeing with H. rnjipennis 

 the}' differ from Charpentier's description and figures in a number of 



