184 



TIIEEAPHOSIDjE. 



4th leg. Legs short, without spines, except two at the tip of each- 

 of the posterior protarsi below. 



cf. Carapaces little shorter than patella and tibia of 1st, a 

 little longer than those of 4th leg. Palpal organ with spine very 

 long and almost semicircularly curved. 



Measurements in mm. $ . Total length 18'5, carapace 7, 1st 

 leg and 4th leg 18. rf . Total length 15, carapace 7, 1st leg 21-5, 

 4th 19. 



Loc. Burma: Mooleyit in Tenasserim and Yado in Karennee 



169. Isclmocolus ornatus, Thorell, Ann. Mm. Genova, xxxvii 

 p. 173, 1897. 



$ . Colour much as in the preceding species, but the abdomen 

 ornamented above with small, sub-oblique pale spots, arranged in 

 two longitudinal rows. Carapace with straight thoracic fovea, 

 longer than patella and tibia of 1st and of 4th legs. Patella and 

 tibia of 1st leg a little longer than those of 4th ; anterior legs with 

 a single inferior apical protarsal spine ; tibiae and protarsi of 3rd 

 and 4th legs spined. 



Measurements in mm. Total length 12, carapace 6, 1st leg 14, 

 4th 15-5. 



Loc. Burma : Prome (Fea). 



Subfamily THRIGMOPCEIN^E, nov. 



A stridulating-organ present between the mandible and the 

 basal segment of the palp (maxilla). On the mandible some of 

 the hairs which form the posterior portion of the oral fringe are 



Fig. 58. External surface of 

 mandible of Thrigmvpxus 

 insignia. a. Cluster of 

 bristles. 



Fig. 59. Inner surface of 

 maxilla of Thrigmopceus 

 insignis. a. Crest bearing 

 spinules. 



modified to form a small cluster of vibratile bristles (fig. 58, a),, 

 and on the adjacent surface of the maxilla there are regularly or 

 irregularly arranged stiff aciculate bristles (fig. 59, a) which scrape 

 against those on the mandible when the maxilla is moved up and- 

 down. 



Distribution. S. India. 



