232 Dr. W. Kae Sherriffs on 



28. Tetragnatha sp. ? 



The commonest Tetragnathid I have discovered is one from 

 Madras Beach. It greatly resembles T. geniculate but the 

 jaws differ. Each mandible has at its junction with the fang 

 a large spine projecting straight in front. 



The webs of Tetragnatha never have a stabilimentum. 



Eucta (Sim.), 1881. 

 29. Eucta sp. ? 



Associated with the Tetragnathids from the Madras Beach 

 are found specimens of a Eucta, which builds its big orb-web 

 at sundown also. It is easily recognized not by its shape 

 and coloration, but by the slightly upturned long tip of the 

 abdomen. This species is probably Eucta caudicula (Karsch) 

 reported from India by Simon, who, however, also records 

 E. isidis which is common to Egypt as well as to India. 



The web of Eucta has no stabilimentum. 



Oksinome (Thor.), 1890. 

 30. Orsinome marmorea (Poc). 



This spider I have met only once on the hills, where I 

 was lucky enough to secure both sexes together. Simon 

 (i. p. 733) remarks that he has no notes regarding its habits. 

 The spiders are big (15 mm. ? , 10 mm. <$) and were found 

 with their large orb-webs slung between bushes horizontally 

 over swiftly running water. Each spider was at the centre 

 of the web hanging inverted and almost touching the quickly 

 flowing current. There is no stabilimentum on the web, 

 which is almost a yard wide. Both sexes were thus found 

 at noon on a dull misty day. Gravely has found them on 

 the Cochin Ghauts at 1500 feet. At the same spot I found 

 closely associated Tetragnatha geniculata, Araneus mitratus, 

 one Argiope, and Cyclosa sp. The big webs of Orsinome 

 and of Tetragnatha geniculata were spun horizontally over 

 the water a distance of one yard. Orsinome hung lowest 

 next the stream, then T. geniculata. Above were the ver- 

 tically placed webs of A. mitrahis with the characteristic 

 white stabilimentum, above these again the vertical webs of 

 the Argiope, with those of Cyclosa at the top. All the webs 

 depended from bushes growing at the. water side. 



In appearance the sexes of Orsinome greatly resemble each 

 other in colour, the colours being much duller than in 

 Leucavge. The <$ Orsinome is almost as big as the ? . 



Locality. Pykara Falls, Nilgiris (6000 ft.). 



