400 



Records of the Indian Museum. 



[Vol. XXII, 



A large and obese spider of a dark greenish black hue, becom- 

 ing paler and browner in spirit. It forms somewhat short broad 

 burrows lined with closely adherent silk and closed by a strong 

 and closely fitting trap-door (pi. xvii, figs. 4-6; pi. xviii, fig. 9), to 

 which the spider clings vigorously when any attempt to open it 

 is made, retreating as a rule only when it has been forced open. 

 These burrows are commonly found in soil that has accumulated 

 among adventitious Ficns roots, where these anastomose over the 

 surface of the trunk. They are also found in termite mounds. 

 They are usually more or less horizontal, the trap-door, which is 

 very firm and strong, being hinged on or towards the upper margin. 

 Males were obtained in August, but not later. 



O Qi 



Text-fig. 



a. Acanthodon constrtictoy 2, eyes. 



b. ,, barkiidensis 2, eyes. 



c. ,, 

 d. 

 e. ,, „ 



f. Damarchiis excavatus 

 from below; hairs omitted. 



S , palpal organ. 



f? , eyes. 



S , end of tibia of first leg with apophysis. 



■? . junction of tibia and tarsus of right first leg 



9 . Total length up to about 23 mm. exclusive of chelicerae 

 and spinnerettes. Length of carapace 10 mm., breadth 9 mm. 



The coxa of the 4th leg is without spinules below and the 

 tibia of the 3rd leg is slightly longer than wide. In this respect 

 the species resembles A . crassus and A . opijex, but it differs from 

 both in having the anterior median eyes only about half a 

 diameter apart. They are about twice as large as the posterior 

 medians which are situated about as far behind them as the 

 anterior medians are from each other. The posterior medians 

 are separated by a space equal to nearly three of their own dia- 



