Stridulating-organ in Mijgalomorph Spiders. 40J 



examine a single specimen (the typical male) of M. auro- 

 nitens, Keyserling. There is no trace of this structure in 

 the typical specimen (a female) ol M. panther ina, Keyserling , 

 which is supposed by Pocock to be the female of M. auro- 

 nitens. It is possible, however, that this organ is condned 

 to the one sex. 



EUPHEICTUS, gen. nov. 

 Anterior row of eyes slightly procuived, the posterior row 

 almost straight. Cephalothoracic fovea minute and pro- 

 curved. Labium armed with many spinules (the spinules are 

 more numerous than is represented in fig. 4), the maxilliB 



Fii?. 1. 



Mandible of Selenogyrus aureus, Pocock, from the inner side. 

 Fiff. 2. 



Mandible oi Euphricttis spinosus, sp. u., from the inner side. 



also spitiulose. Posterior sigillae of sternum of small size, 

 widely separated from one another and separated by about 

 twice tlieir length from the margin of the sternum. Inner 

 surfaces of the mandibles furnished with a stridulating-organ 



* T. c. V. 18. 



