174 OKTHOPTERA. 



Hah. Guatemala, San Geronimo, Duenas {Champion). 



In this species the wings are narrow, and the costa of the fore pair is but very little 

 bent at the tip, and, consequently, the longitudinal veins are nearly straight, sub- 

 parallel, and not so distant from each other as in 0. tessellatus and 0. punctulatus. 



4. Oligonyx punctulatus, sp. n. (Tab. IX. figg. 23-25.) 



S . 0. striolato affinissimus ac gracilior, pronoto et pedibus paulo angustioribus, laevigatis, baud granulans. 

 Fnlvescens, pedibus brunneo-punctatis. Prothorax marginibus luteis, integris, in collo remote fusco- 

 dentioulatis, anterius granulia raris notatus. Elytra et alae nebulosa, paulo latiora, apice obtusius 

 rotundata, venis longitudinalibus interrupte fuscis, scilicet maculis elongatis fuscis, venulis transversis ad 

 exsertionem haud infuscatis, in elytro decoloribus. Coxae anticae retro prothoracem superantes, margine 

 anteriore integro, superiore vix crenulato. Pemora margine inferiore interno longius inermi, vix crenulato. 

 Tibiarum spinas breviusculae, externa haud arcuata ; margine interno basi dentulis 1-2. Lamina supra- 

 analis brevior, quando deplicata trigonalis, aequaliter lata ac longa, apice haud hebetato, a stylis 

 superata. 



Long. 28-5 ; pronot. 5*5, femor. ant. 5-2, elytr. 17*75, lat. elytr. 4-75 millim. 



Had. Mexico, Dos Arroyos in Guerrero 1000 feet (H. H. Smith). 



The veins of the elytra and of the apex of the hind wings are alternately brown and 

 hyaline, that is to say, with short, brown spaces interrupted by hyaline segments ; 

 towards the tip the veins are dotted with brown. The wings of this species are shorter 

 than in 0. striolatus and 0. tessellatus ; the nervures are less arcuated than in 0. tessel- 

 latus, but more than in 0. striolatus. 



5. Oligonyx tessellatus, sp. n. (Tab. IX. figg. 26-31.) 



3 . Pulvescens, 0. striolato simillimus ; pronoto tamen breviore. Caput minus latum. Prothorax brevis, fere 

 rhomboidalis ; ejus pars postica quam pars antica vix longior, haud vel vix granulata ; pars antica 

 subgranulata, trigonalis, scilicet marginibus totis convergentibus, collo breviusculo, haud parallelo ; 

 marginibus vix denticulatis. Elytra et alae grandia, abdomen superantia, nebulosa, fusco-punctulata, 

 margine anteriore apice valde areuato, venis discoidalibus itaque apice curvatis (plus quam in 0. punc- 

 tulato). Elytrorum venae campi discoidalis elongato-fusco-tessellatae, ut in specie laudata, et ad venas 

 griseo-maculosae ; inter illas, saltern in dimidia parte apicali, griseo-punctulata ; venulis transversis insuper 

 ad exsertiones fuscis ; venis media et ulnari magis obliquis ; areis longitudinalibus disei propter hoc 

 latioribus. Alarum pars apicalis fere eodem modo quam elytra tessellata. Pedes antici fusco-faseiati, 

 paulo minus graciles ac breviores. Coxae retro prothoracem superantes, margine antico remote denticulato, 

 superiore subtilissime serrulate Pemora margine infero-interno basi tantum in tertia parte inermi, vix 

 crenulato. Tibiae spina exteriore subrecta, margine interno prope basin denticulis 2. Lamina supra- 

 analis trigonalis, apice hebetata, a stylis superata. 



Long. 24-5; pronot. 4*5, femor. ant. 4-8, elytr. 21-4, latit. elytr. 5-2 millim. 



Hah. Mexico, Omilteme in Guerrero 8000 feet (H. II. Smith). 



A remarkable species on account of the short prothorax and the large elytra and 

 wings, the latter with more arcuated nervures than in the other representatives of the 

 genus. The ulnar veins of trie anterior wings are also more oblique, not reaching so 

 far as in the allied species, and more distant from one another. 



