NYCTOBOBA. 55 



furcatis ; campo marginali plus minus lato, in elytris venis valde obliquis subarcuatis, in alis venis longi- 

 tudinalibus ramosis obsito. Eemorum anteriorum spina genicularis in margine apicali anteriore exserta* 

 Cerci longi. 



This Tribe forms a sort of transition from the Blattinae to the Periplanetinse on 

 account of the shape of the anal plate and the long cerci. The elytra and wings have 

 quite the neuration of the Periplanetinse ; but the last ventral segment is flat as in 

 Blattinse, not compressed and sulcate as in Periplanetinse. The presence of narrow, 

 tongue-like appendices on the margins of the meso- and metanotum shows a further 

 affinity with the PeriplanetinEe. The Tribe Nyctoborinse is peculiar to the hot parts 

 of America. It includes only two genera: Nyctobora, in which the claws are 

 furnished with an arolium, and Megalobatta, which is destitute of an arolium between 

 the claws. 



NYCTOBORA, Burm. 



Nyctibora, Burmeister, Handbuch, ii. p. 501 ; Bruimer de W. Syst. Blatt. p. 142. 

 Nyctobora, Saussure, Mem. Mex., Blatt. p. 65. 



Statura majuscula vel mediocris. Oculi valde approximati. Pronotum corneum, subeonvexum, antice quam 

 postice magis arcuatum ; in maribus parvum. Elytra et alse, quando condite explicafca, longa ac lata, 

 campo marginali latiusculo. Pedes spinosissimi. Femora 2 a , 3 a spinis longis remotis in utroque margine ; 

 anteriora in margine antico spinis minoribus numerosis confertis, in margine postico spinis paucis remotis, 

 armata. Femora insuper omnia spinis apicalibus 1: 1, in anterioribus 2:1, instructa. Tarsi inter ungues 

 aroliis magnis instructi. Abdominis segmenta ultima utrinque trigonali-producta. Lamina supra-analis $ 

 leviter prominula, trigonali-rotundata, S trapezina. Cerei sat longi. Pronotum et elytra griseo-sericea. 



Synopsis specierum. 



1. Elytra et alse $ <$ condite explicata. — Nyctobora, Burm. 

 a. Oculi J contigui. — 1. mewicana, Sss. 

 aa. Oculi $ haud contigui, vel subcontigui. 



b. Omnino fuscae ; elytrorum campo marginali angustiore. 

 c. Minor, oculis $ paulo propioribus. — 2. azteca, sp. n. 

 cc. Major, oculis $ paulo magis remotis. — [intermedia, Sss.] 

 bb. Pronoto utrinque flavo-limbato. — [sericea, Burm.] 

 11. Elytra et alse $ $ truncata, cornea. — Heminyctobora, nob. 

 Nigra ; alis minutis rufis. — 3. truncata, sp. n. 



l. Nyctobora mexicana, Sauss. 



Nyctobora mexicana, Sauss. Mem. Mex., Blatt. p. 66. 12; Brunn. de W. Syst. Blatt. p. 147. 5; 

 Sauss. Miss. Scient. Mex., Orthopt. p. 68. 1, t. 2. figg. 38, 38 b. 



Media ; castanea ; elytris eastaneo-rufescentibus. Elytra et alse in utroque sexu complete explicata? : pronotum 



itaque in utroque sexu elliptico ; in maribus quam in N. azteca minor, 

 c? . Long. 25-27 ; elytr. 32-5, latit. elytr. 11-75, pronot. 7, latit. pronot. 9*8 millim. 

 2 . Long. — ?; elytr. 28*5, latit. elytr. 11-5, pronot. 7'6, latit. pronot. 12 millim. 



Sab. Mexico (Saussure) ; Guatemala, San Juan in Vera Paz (Champion). 



