1921.J L. Chopard : Cavernicoloiis Orthoptera. 513 



posterior margin a little sinuated, the angles prominent, provided 

 with a bristle. Inferior part of the thorax whitish with a short 

 rufous pubescence. 



Abdomen rather narrow, depressed, yellow above, whitish 

 beneath, glabrous, with a bristle at the posterior angle of each 

 tergite. First tergite very short, the following regular, their 

 posterior margin straight, to the 6th ; 7th, 8th and 9th very short, 

 loth forming a small triangular supraanal plate, with sinuated 

 margins and rounded apex. Sternites with their posterior margin 

 a little concave, the 9th forming a short (incompletely developed) 

 subgenital plate with posterior margin convex ; style very short, 

 bearing a few bristles. Cerci rather long, slender, composed of 

 8 joints, the first 3 of which are broader than long, the 4th almost 

 square, 5th and following ones longer and longer, 8th slender, 

 almost cylindrical ; pubescence rather scarce, composed of long 

 bristles. 



Legs of the same colour as the body, with a short and scarce 

 pubescence. Front femora compressed, armed beneath, at the 

 external margin with a single apical spine, the internal margin bear- 

 ing, near the base, 4 rather strong spines, then a series of about 

 10 spinuliform hairs, i strong enough spine and the apical one 

 rather long ; above this is a long, curved spur, inserted almost in 

 the middle of the apical margin. Tibiae almost as long as the 

 femora, cylindrical, with scarce pubescence, armed with 5 apical 

 spurs, I external inferior and 3 superior spines (3 int. , i ext.). Tarsi 

 rather long, the ist joint longer than the three following united, 

 these equaling together the 5th ; pubescence scarce, almost spinuli- 

 form. No arolia between the claws. Intermediate femora com- 

 pressed, armed with a long, curved, apical spine on the superior 

 external margin ; inferior internal margin bearing 4 small spines, 

 external margin with 4 or 5 weak spines separated by spinuliform 

 hairs, one of which is apical. Tibiae rather long and strong, 

 armed with 5 apical spurs, 7 superior (2 int., 2 med., 3 sup.) and 

 4 inferior spines (3 ext., I int.). Tarsi rather short, the metatarsus 

 equaling the other joints together. Posterior legs similar to the 

 intermediate ones ; femora armed with a long, superior, internal 

 apical spine, their inferior margins bearing 4 to 5 weak, irregular 

 spines and i apical, a httle stronger one. Tibiae armed with 5 

 apical spurs, 12 superior (5 int., 3 med., 4 ext.) and 8 inferior 

 spines (4 int., 4 ext.), the external longer than the internal ones. 

 Tarsi similar to the intermediate ones. 



Length of body 11-5 mm., length of pronot. 2*6 mm., width 

 of pronot. 3-5 mm. ; ant. fern. i'9 mm. ; ant. tib. i'5 mm. ; 

 interm. fem. 2'4 mm. ; interm. tib 2-3 mm. ; post. fern. 3 mm. ; 

 post. tib. 3-5 mm. ; post, tarsi 3"6 mm. ; cerci 3 mm. 



Although represented by a single immature specimen, this 

 species is very distinct from all the known cavernicolous Blattids 

 and I do not hesitate to describe it. A careful examination of 

 the genitalia allows me to suppose that this insect had two moults 

 to make before being adult ; very likely the imaginal stage would 



