THE FAUNA OF A DESERT TRACT IN SOUTHERN INDIA. 



209 



X. Demodocus capensis (Thunb.). 



Only one specimen taken. It is considerably smaller and paler in colour than indivi- 

 duals in the Museum from Calcutta. Probably both it and the examples of the prece- 

 ding species may be taken to represent dry-season forms. 



XI. ACANTHODIS ULULINA, Guer. 



A specimen was brought me at Ramanad clinging to a stick. Its attitude was 

 exactly that of Sathrophyllia rugosa as figured by Willey in Spolia Zcylanica, Vol. II. This 

 attitude is one maintained during rest by many of those Pseudophyllides which resemble 

 the bark of trees {e.g. Acanthodis imperealis). Leaf-like species frequently also adopt it, 

 especially during early life before the wings and tegmina are fully developed. In the 

 latter case the position chosen is the midrib or stalk of a green leaf, in the former a tree 

 trunk or withered twig. It is less easy to startle Acanthodis ululina from this admirably 

 adaptive attitude than is usually the case with the bark-like or stick-like Phasmides, 

 which frequently assume a very similar one, while the species which live among grass or 

 canes often spread out their limbs in an irregular formation. 



XII. Gryllotalpa africana, Pal. de B. 



This appears to be the common peninsular species, while G. vulgaris is more abun- 

 dant on the North -West Frontier. A specimen, of rather small size, of G. africana was 

 brought to me at Ramanad. 



XIII. COPHOGRYLLUS ARENICOLA, Sp. nOV. 



9 Body cylindrical, stout ; head large, globular, with broad inter-antennal space ; 



pronotum large, much broader than long, simple ; tegmina persisting as minute vestiges, 



cerci long, provided with long, fine hairs to the tips, ovipositor not more than half the 



length of the abdomen, barely longer than the cerci, feebly expanded at the tip. Colour 



varying with the state of preservation ; in life pale testaceous, clouded with brown on 



the outer surface of the posterior femora, with brown markings at the lower extremity of 



all the femora, and sometimes with a row of dark spots across the head between the eyes. 



Surface smooth, with fine scattered hairs, irregularly shaped tracts of grey pubescence on 



the lateral lobes of the pronotum. 



mm. 



Total length ... ... ... ••• ... 27-5 



Breadth of pronotum ... ... ... ... 6 



Length ... ... ... ... ••• 4-5 



Length of cerci ... ... ••• ... 7 



Length of ovipositor ... .... ... ... 8 



This species is not uncommon under stones on the sandy wastes at Mandapam, but 

 only females were seen. Each had formed round itself an oval wall of sand grains, which 

 were loosely fastened together. Above, this wall was fastened to the base of the stones ; 



