5i6 Records oj the Indian Museum. [Vol. XXII, 



interm. fern. 6 mm. ; interm. tib. 6 mm. ; post. fem. 13 mm. ; 

 post. tib. I2'5 ram. ; post, tarsi 5 mm. ; post, metat. 2"5 mm. 



This species is described after a single immature male : from 

 uhat I know of these cavernicolous Orthoptera the mature speci- 

 m.ens must present almost exactly the same characters and their 

 size must be about 25 mm. It is closely allied to R. midmeincnsis. 

 Chop., having like the latter species very short legs but the ros- 

 trum of the vertex is more acute and the coloration shows a very 

 decided contrast between the rufous ground-colour and the blackish 

 markings of the bodj' and legs. 



Gen. Diestrammena, Brunner. 



Diestrammena. Brunner, 1888. Verb. zool. hot. Ges. IVieii, .W.WIII 



p. 298. 

 Paradieitrammena, Chopard, icig. Mem. As. Soc. Beiig., \ I. p. 375. 



When I described the genus Paradiestrammena , I explained 

 that its creation seemed necessary to me on account of the spe- 

 citic identitj' of Diestrauiiiicna iiiariuorata, Haan and Tachycines 

 asynamorus, Adel. Since then, Dr. H. Karnj' had the opportunity 

 of esam.ining the types of Haan in the Leyden Museum and he 

 wrote to me that D. inarinoi-ata was quite a diilerent species of 

 the Tachycines found in the hot-houses of Vienna and several 

 other towns of Central Europe. A little later Pr. R. Ebner had the 

 kindness to send me all the specimens of Diestrammena and 

 Tachycines of the Brunner collection and I could ascertain that 

 both species are very different from one another. D. marmomia, 

 Haan, is a large species of the longipes group, known only from 

 Haan's type and 6 specimens (4 of which are very young) in the 

 Brunner collection. 



The genotype of Diestraiiiinena , Br., is therefore D. maritwrata , 

 Haan, and the description I gave for Paradiestrammena can be 

 applied exacth' to this genus. 



The cavernicolous species of Diesiramuicna are much smaller 

 than the typical species and form a pretty well-defined group. 

 .Several forms having i)een described and a few modifications 

 made since I published a key for this genus {Bull Soc. cnt. Fr. 

 [1916], pp. 154-159) I think it necessarj^ to give a new synopsis 

 of its known species. 



Kej^ to the species of Diestrammena, Br. 



1. .\nturior and intermediate tibiae armed 

 with 2 apical inferior spurs without n^edian spine 

 between them . .., ...2. 



— .Anterior and intermediate tibiae armed with 

 3 .ind 4 apical spurs with a small median spine 

 between the inferior spurs ,v 



2. Small size (to nim.i, slender; anterior 

 tibiae bearing i single spine beneath, intermediate 

 tibiae without spine : posterior tibiae unarmed be- 

 neath ; 6 subgenital plate very large, widely 

 rounded, epiphallus very small, conical ; 9 sub- 



