178 ORTHOPTERA. 



minus fusco-fasciati. Coxae retro basin prothoracis haud attingentes, basi et apiee infuscatae, extus 

 granulatae, lobo apicali marginis superi trigonali, margine superiore tenuiter dense denticulato, in parte 

 apicali vix dilatato, ante illam ultra medium leviter sinuato. Tibiae rectae, spinis elongatis. Lamina 

 supra-analis elongata, lanceolata, infra-genitalem superans. 

 Long. 50 ; pronot. 16*2, femor. ant. 10*5, lam. supra-anal. 2*8 millim. 



Hab. Honduras, Ruatan I. (Gaumer). 



A very distinct species, differing from 8. Ucornis (Sss.) in the more slender form, 

 the much wider head (resembling in this respect the genus Oligonyx), the much larger 

 eyes (convex up to the top), and the more slender and much more finely denticulate 

 collar ; the spines of the anterior tibiae are also much longer, and the anterior coxae do 

 not reach to the base of the prothorax. 



THRINACONYX *, Sauss. 



Thrinaconyx, Saussure, Societas Entomologica, 1892, p. 122. 



Corpus breve ac gracile. Caput transversum ; fronte tuberculata ; vertiee compresso, transverso. Prothorax 

 breviuscnlus, gracilis ; ampliatione latiuscula ; parte postica quam collum haud latiore. Elytra area 

 costali lata, venis obliquis irregulariter reticulatis, area mediastino-discoidali angusta, quadrato-reticulata ; 

 vena mediastina elongata, campum marginalem per totam longitudinem dividente. Pedes antici gracillimi ; 

 coxis tamen basi incrassatis. Femora gracillima, ultra medium linearia ; margine interno spinis circ. 7 ; 

 basi spinis discoidalibus 4, tertia majuscula ; apice spinula utrinque perspicua. Tibiae gracillimae, longi- 

 usculae, teretes, subdecurvce, ungue subrecto, minuto, apice fasciculato-spinosse, scilicet spinis apicalibus 

 dorsalibus arcuatis 2 instructae, necnon intus spinis 2, extusque 1-2 insuper armatis. Lamina supra- 

 analis trigonalis haud retro prominula. Cerci acuti. 



Peminae ignotae (anne alatae?). 



J S • Elytra et alae ampla, abdomen superantia. (Elytra alis breviora.) Alarum vena ulnaris furcata. 



This is a well-marked genus, characterized by its short form, large wings, and very 

 slender legs ; and, principally, by the anterior tibiae being curved upwards, their 

 armature resembling that of Thesprotia and Spanionyx (comp. Tab. X. fig. 2). The 

 terminal claw of the anterior tibiae is small, straight, and spine-like. The inner margin 

 (Tab. X. fig. 8) bears two spines beyond the middle, as long as the claw, and two 

 of the other spines are transferred from the margin on to the dorsal face of the 

 tibia and are scarcely less apical than the claw (the inner one shorter than the outer, 

 this last corresponding to the dorsal spine of Thesprotia i). Altogether, there are 

 five or six spines — five if there is only one, six if there are two, on the outer margin. 

 In addition, the inner margin before the spines is finely crenulated and bears two or 

 three small obsolete denticulations. 



* OpivaZ,, fork : oruij, claw. (The anterior tibiae with two spines or claws at the apex above.) 

 t The two dorsal spines are difficult to distinguish. They are best seen when the tibia is examined from 

 above ; in profile, only one is visible (the inner) — it looks like the claw, being as large and slightly more 

 apical than the claw itself. The true claw, placed under the two dorsal spines, appears as a third spine 

 of the inner margin. 



