46 OBTHOPTERA. 



16. Blatta chichimeca, sp. n. (Tab. IV. fig. 22.) 



(? . Testacea. Caput subtus punctis 4 brunneis. Oculi in vertice sat remoti, a supero fere paralleli, ab antico 

 in medio leviter produeti, rotundati. Pronotum ellipticum, margine posteriore leviter arcuato, in medio 

 haud producto; discus flavidus, remote brunneo-punetatus. Elytra abdomen superantia. Alae vitreae, 

 venis brunneis ; venis eostalibus parum numerosis, longe levissime incrassatis. Vena ulnaris 4-5-ramosa. 

 Venulse transversa? area? ulnaris antiee et postice incomplete, inter ramos completae sed parum numerosse ; 

 prima? invicem remote. Yena axillaris posterius biramosa (anterius nonnunquam ramum incompletum 

 ad venam dividentem emittens), subtus marginibus plus minusve brunneis. Tibiae ad exsertionem spinarum 

 brunneo-punctataa. Abdomen infuscatum vel fusco-marmoratum, marginibus testaceis ; segmenta 

 ultima pallidiora vel testacea. Lamina supra-analis transversa, inter cercos leviter producta, obtusangu- 

 lata (angulo apicali frequenter deflexo). Cerci testacei, modice longi, articulis basalibus transversis, 

 articulis ultimis tribus paulo longioribus, haud moniliformibus, marginibus potius serratis. Lamina infra- 

 genitalis supra-analem superans in medio inter stylos rotundato producta ; styli bini invicem minus remoti 

 quam a cercis. 



Long. 13-5 ; elytr. 15, latit. elytr. 4-8, pronot. 3-5, latit. pronot. 5*25, long, cercorum 2-6 millim. 



Hab. Mexico (Saussure), Mexico city (Forrer ), Cuernavaca in Morelos (H. H. Smith). 



This insect much resembles B. nahua, Sauss. It is a little smaller ; the wings are 

 not so regularly reticulated ; the eyes are more distant, not convergent above ; and the 

 cerci are shorter (not moniliform, as in B. nahua, 6 ). The lamina supra-analis and 

 the lamina infra-genitalis are very differently formed in the two species. B. chichimeca 

 may prove to be the male of B. zapoteca, Sauss. (*?) ; but it does not possess the same 

 brown picturing of the body, and the elytra are less fulvous, more transparent. 



17. Blatta mexicana, Sauss. 



Blatta mexicana, Sauss. Rev. et Mag. de Zool. 1864, p. 311. 14; Miss. Scient. Mex., Orthopt. 

 p. 28. 3. 



Hab. Mexico (Mus. Parisiense). 



PSEUDOPHYLLODEOMIA, Brunn. 

 Pseudophyllodromia, Brunner de W. Syst. Blatt. p. Ill (1865). 

 Ellipsidion, Saussure, Rev. et Mag. de Zool. 1864, p. 312 (ex parte). 



Synopsis specierum. 

 1. Femora anteriora subtus in marginis anterioris dimidia parte apicali spinulis minimis pili- 

 formibus instructa (ad typum Platamodem (antea, p. 30) pertinentia) . Elytra angusta, 

 margine costali subsinuato, venis discoidalibus 2-3. Alee parum venosse, vena ulnari 2-3- 

 ramosa. — Pseudophyllodromia, Br.* 



Bufo-castanea, abdomine rufo-flavo ; pronoti disco nigro, luteo-lineolato. — 1. venosa, Sss. 

 11. Femora anteriora margine anteriore spinis numerosis et ad apicem armata. Elytra latiora, 

 margine costali arcuato, multivenosa. Alarum campus anterior latus, multivenosus, poste- 

 rior reticulatus. — Macrophyllodromiaj-, nob. 



Valida, rufescens; pronotum flavidum, nigro-bivittatum. — 2. mawimiliani, Sss. 



* The ventilation of the elytra much resembles that of Thyrsocera. 



f The venulation of the elytra and wings is very different from that of PhyUodromia, Thyrsocera, and allied 

 genera ; it is more like that of Nyctohora. 



