„KHICNODA. 69 



Abdomen punctatum, segmentorum margine eodem modo granuloso-tuberculoso ut in thorace, angulis 

 retro produetis. Lamina supra-analis trigonalis, carinata, marginibus renexis, apice trigonali-incisa, bilo- 

 bata. Cerci brevissimi. 

 Long. 21-8 ; pronot. 6-4, latit. pronot. 10*5, mesonoti 13 millim. 



Hab. Nicaeagua, Chontales (Janson). 



This insect may prove to be a larval form, although no lateral sulci are indicated on 

 the meso- and metanotum. 



[2. Ehicnoda laminata, Bmnner de w. 



Homalopteryx laminata, Brunn. de W. P. Z. S. 1892, p. 204, t. 15. fig. 4 ( 6 2 )• 

 Hab. Antilles, St. Vincent.] 



Tribus PERIPLANETIN^l. 

 Periplanetida, Brunner de W. Syst. Blatt. p. 202. 

 Periplanetiens, Saussure, Melang. Orth. i. 2 e fasc. p. 75. 

 Periplanetites, Saussure, Miss. Scient. Mex., Orthopt. p. 70. 



Abdominis 4 m segmentum dorsale margine postico transverso, recto (in G. deropelti, $ , undato). 



Synopsis generwm *. 



1. Cerci laminam supra-analem superautes. Tibiae supra triseriatim spinosse. Lamina supra- 

 analis $ trigonalis, incisa vel truncata ; vel rotundata, bilobata ; £ variabilis, frequenter 

 transverse quadrata, late obtusangulatim subincisa. Elytra in utroque sexu completa vel 

 abbreviata, squamiformia vel nulla. — (Stirps Periplaneta.) 

 2. Tarsi postici crassiusculi, parum elongati, plantis magnis, saltern in articulis 2°-4°. Meta- 

 tarsus articulis 3 sequentibus computatis tequilongus vel parum longior. Arolia inter 

 ungues majuscula. Oculi invieem valde remoti, in vertice quam scrobse antennarum 

 magis vel sequaliter distantes. Elytra abbreviata, vel squamiformia vel nulla. 

 3. Cerci breves, laminam supra-analem vix superantes. Elytra cornea, valde abbreviata 

 vel squamiformia. Alse squamiformes vel nullse. — Eurycotis, Stal. 

 33. Cerci elongati, laminam supra-analem sensim superantes. Elytra et alse abdomen baud 

 superantia. Elytra coriacea ; alarum campus posticus ramoso-venosus, in requiet? 

 baud plicatus. — Pelmatosilpha, Dohrn. 

 22. Tarsi postici graciles, elongati, plantis minutis ; ilia 2 s articuli dimidiam partem basalem 

 marginis inferi liberans. Metatarsus reliquis articulis computatis sequilongus vel longior, 

 compressus, subtus valde spinulosus. Arolia inter*ungues parva. Cerci longi. 

 3. Oculi invieem remoti. 



4. Planta articuli 2 1 tarsorum posticorum partem dimidiam articuli occupans. Abdomen 

 serratum, angulis segmentorum retro acutis. Elytra abbreviata vel squamiformia. 

 — Doryl/Ea, St. 



* The genus Platyzosteria, Brunn. de W., is an Australian and Indian type, and has for synonym tho 

 genus Melanozosteria, Stal, which name must be suppressed. 



