294 OKTHOPTEKA. 



3. Schcenobates saltator, sp. n. (Tab. XIV. fig. 16.) 



F lavo-testaceus, supra fusco-tessellatus, vel castaneus, flavo-punctatus efc maculosus. Caput ab antico visum 

 angustulum, ocello flavo distineto notatum. Yertex inter antennas compressus, cum cranio polito 

 carinulatus. Pronotum postice truncatum, margine posteriore supra vix arcuato, disco flavo-maculoso ; 

 lobi laterales antice valde rotundati. Pedes fusco-marmorati. Tibiae posticae supra spinis 7 : 9. Lamina 

 infra-genitalis £ acute trigonalis. Ovipositor basi latus, in medio coarctatus, dehinc paulum dilatatus. 



2 . Long. 20 ; pronot. 5 ; femor. post. 16 ; ovipos. 10 millim. 



Eab. Costa Eica, Volcan de Irazu 6000 feet (Sogers). 



[PHERTERUS, Brunn. 



Pherterus, Brunner v. Wattenwyl, Monogr. der Stenopelm. und Gryllacr. p. 38 (1888) . 



The genera Pherterus and Glaphyrosoma are closely allied and have not been 



sufficiently well defined by Brunner von Wattenwyl. It is principally in the form of 



the anal pieces that the true distinctive characters are to be found ; we therefore give a 



fresh diagnosis of each of them *. 



Corpus compressum, nitidissimum. Lobi laterales pronoti margine infero arcuato. Tibiae anticse supra 

 utrinque spinosae. Tibiae posticae subtus margine externo spinis minoribus 2-3 instructae (anne in 

 omnibus speciebus incertum est) ; eorum calcaria intermedia utrinque longissima, quam superiora duplo 

 longiora ; calcar supero-externum a secundo valde remotum, in margine externo tibiae exsertum. Lobi 

 mesosternales trigonales. Lamina supra-analis brevissima, complete transversa, incisa, in medio complete 

 divisa. 



$ 2 • Lamina infra-genitalis rotundata. Ovipositor longe falcatus, valde compressus, acutus. 



cj <$ . Ultimum segmentum dorsale (9 m ) margine postico transverse recto. Lamina supra-analis ilium breviter 

 superans, transversa, latissima (segmentum abdominis imitans), margine postico profunde inciso. Lamina 

 infra-genitalis quadrata, convexiuscula, margine postico inter stylos sinuato, biangulato; stylis 

 cylindricis longiusculis. Appendices anales laterales nulli. Apertura apicis abdominis per lamellas 2 

 simul sumptas angulum recedentem formantes, clausa. Lamella supera rotundato-triangularis, perpendi- 

 cularis ejusque angulus superior in incisura laminae supra-analis aptatus. Lamina inferior subhorizontalis, 

 rotundata ; basi aream trigonalem subelevatam praebens, impressione elongato-punctiformi notata ; 

 margine postico stylis 2 corneis titillatoribus invicem remotis, basi dilatatis, apice arcuatis, simul sumptis 

 forcipem imitantibus, armato. 



The anal pieces in the males of the Locustidse are very complicated in structure and 

 require a long study before they can be compared and homologized in the various 

 species. The enclosing piece here described must be considered as the penis. Its 

 inferior part is very distinct as such in Glaphyrosoma, in which it is elongate, thick, 

 and rounded. In Pherterus this part appears to be lamellar and chitinized (the real 

 structure, however, can only be made out when fresh specimens are available for 



* They may be distinguished as follows : — 



Pherterus. — Inferior margin of the lateral lobes of the pronotum arcuate. Infra-genital plate of the 

 females rounded. Supra-anal plate of the males (10th abdominal tergite) very short, notched. Anal 

 appendages ( 3 ) not apparent. 



Glaphyrosoma. — Inferior margin of the lateral lobes of the pronotum straight. Infra-genital plate of the 

 females triangular, acute. Supra-anal plate of the males concealed under the 9th abdominal tergite. Anal 

 appendages large. 



