30 ORTHOPTERA. 



Species incerta. 

 [Anaplecta lateralis, Burm. 



Anaplecta lateralis, Burm. Handb. ii. p. 494 ; Brunn. de W. Syst. Blatt. p. 65. 5, fig. 2 ($). 



Alae sordide hyalinae, macula fusca ad marginem anteriorem ; campo apicali elongato-trigonali, subopaco, $> 

 triente parte longitudinis alae aequali, apiee subacuminafco. (Gomp. figuram laudatam.) A. fallaci 

 (no. 9) pictura simillima. 



Hab. Colombia.] 



Tribus BLATTINtE. 



Phyllodromida, Brunner de W. Syst. Blatt. p. 74. 

 Blatlites, Saussure, Miss. Scient. Mex., Orthopt. p. 20. 



The species of this Tribe present two different types in the armature of their anterior 

 femora. The anterior inferior edge of these femora always bears two long apical spines ; 

 but the edge itself is armed as follows : — 



Type 1 (Tab. VI. fig. 17). The basal half with 3-6 long spines distant from each 

 other, and the apical part with numerous very small setiform spinulse (type Platamodes, 

 Scudd., Stal). 



Type 2. The entire edge armed with distinct spines, which are smaller in the apical 

 half than the basal spines, and decrease in length towards the end. 



Scudder has proposed the genus Platamodes for a species of Ischnoptera belonging 

 to the first type ; and Stal has divided nearly the whole Tribe into two genera based 

 upon the two types here indicated. This system of classification cannot, however, be 

 maintained, the two types reappearing in most of the natural genera; so that if it was 

 adopted we should have to make twice as many genera. 



Stal has also proposed a genus Liosilpha to receive the species of the second type which 

 have the supra-anal plate (?) a little emarginated (comp. Tab. IV. fig. 21) ; but this 

 character is also found in a number of species of the first type, so that if we follow 

 him we should have to still further subdivide the genera. Neither Scudder nor Stal 

 would have taken the above-mentioned characters as generic if they had examined a 

 greater number of species. Thus, we have preserved the excellent classification given 

 by Brunner de Wattenwyl in his * Systeme des Blattaires,' to the exclusion of the 

 divisions proposed by Stal, utilizing the characters of the two types only to form 

 sections of the genera. 



Synopsis generum. 

 1. Elytra perfecte explicata. 



2. Elytra membranacea vel parum coriacea, in utroque sexu perfecte explicata, rare in 

 feminis abbreviata. 

 3. Antennae incrassatae, piloso-plumosae. 



4. Pronotum posterius arcuato-productum vel snbangulatum ; venae ulnares elytrorum 

 pone campum analem fractae, omnes indivisae. — Thyrsocera, Burm. 



