XXX. ON SOIME NEW OR LlTTlvE-KNOWN 

 MYGALOMORPH SPIDERS FROM THE 

 ORIENTAL REGION AND AUS- 

 TRALASIA. 



By Stanley Hirst. 



[Published by permission of the Trustees of the British Museum.'] 



The following note contains the descriptions of a new genus 

 and six new species of mygalomorph spiders, and also notes on some 

 incompletel}^ known species. The forms dealt with are nearly all from 

 the Oriental region and are preserved in the collections of the British 

 Museum (Nat. Hist.) or of the Indian Museum (Calcutta). The 

 new genus diffe s from all other Oriental mygalomorph spiders in 

 having a sound-producing organ between the mandibles. 



Damarchus assamensis , sp. nov. 



Colour a more yellowish brown than D. oatesii, Thorell. 



Carapace considerably shorter than patella and tibia of first or 

 fourth legs or than metatarsus of fourth. Anterior row of eyes 

 more strongly procurved than in D. oatesii. 



Palp. Spine of palpal organ longer, as compared with the 

 bulb, than is the case in D. oatesii (plate xxiv, fig. 8). 



Legs. Patella and tibia of first leg a little shorter than those 

 of the fourth ; metatarsus of first armed below towards the posterior 

 side with i.i spines and with a pair of apical spines; its anterior 

 surface unarmed. Metatarsus of the second leg armed in the same 

 way as that of the first, but an additional anterior spine is present 

 below and an antero-dorsal spine also. Tibia of first leg with its 

 armature resembling that of the metatarsus of the second but with 

 I.I upper anterior spines; the large inner apical spine with its 

 curvature less pronounced than that of D. oatesii (fig. 7). 



Tibia of second leg lacking the inner ventral spine. Tibise and 

 metatarsi of posterior legs armed below with a number of spines. 

 Patella of third leg with two or three anterior spines. Tarsi of all 

 four pairs of legs scopulate, the metatarsi of the anterior legs also 

 scopulate apicalh'. 



Measurements in nun. Total length 14, length of carapace 

 7-25, of first leg 24, of second leg 22-5, of third leg 21, of fourth 

 leg 28. 



Material. A single adult male from Sibsagar, Assam, collected 

 by Mr. Peal. (Indian Museum collection.) A number of females 



