84 



transverse rows; between these two tlie genital aperture is I'oiind together willi a 

 complicated system of chitinous bars. 



Palps. — The palps are perhaps slenderer, especially the hand, which is not 

 .twice the breadth ol' the tibia and which has the anterior margin less suddenly 

 and less strongly convex ; the fingers are comparatively longer. 



Coxae. — The fourth pair of the coxae are comparatively shorter and 

 broader than in the female. 



Measurement. — Specimen from Koh Chang. Céphalothorax 0-532 (()336-- 

 0-520); Abdomen 1-260 (0-616) mm. 



Specimen from Klong Salakpet. Palps: trochanter 0252 (0140); femur 0-700 

 (0-178); tibia 0504 (0170); hand 0550 (0.280); finger 0-670 mm. 



Leg I: femur I 0360 (0072-0090); femur II 0-180(0081); tibia 220(0060); 

 tarsus I 0-173 (0050); tarsus II 0228 (0036) mm. 



Leg IV: femur 0522(0-207), Irocliantin 0-260; tibia 0-360(0-097); tarsus I 0189 

 (0-065); tarsus II 0-323 (0048) mm. 



Material. — Dr. Th. Mortensen has taken one female and two males from 

 under stones in the month of January at Koh Chang; Ihe female had the abdomen 

 stronglj' dilated with eggs; he collected besides two males in the wood at Klong 

 Salakpet in the month of March. 



Remarks. — Thi.s species is in several respects similar to I. laminatus n. sp., 

 but is easily distinguished from the latter by the shape of antennae, palps and 

 legs f. inst. I have in the above description of the female given the detailed 

 description of the antennae, labrum, maxillae and legs of the male, as the scanty 

 material did not permit a more thorough investigation of these organs in the 

 female; I thought this arrangement more practical, as sexual differences are 

 scarcely found in these organs. 



2. Ideoronciis lamiiudus n. sp. 

 (PI. I, figs. 5 a— c). 



One pair of eyes; distance from front margin grealer than their diameter. 

 Cephulotiiorax distinctlij longer than broad behind with median prolongation of front 

 margin pointed. Abdominal tergites longitudinally divided. Inner margin of the 

 immovable finger nnlh several small teeth ; flagelhim consisting of four spasely toothed 

 hairs; a lamina exterior present; galea long moderately curved. Femur of the palps 

 almost four times as long as broad, a trifle narrower than the tibia, but a little longer. 

 The hand is almost twice as broad as tibia and shorter than the fingers. The four 

 dorsal tactile hairs of the hand of the palps are placed in a square. The coxae are 

 placed on a level with the ma.villae ; the tibia of the first pair of legs ilistinctly longer 

 than second tarsal joint : terminal lateral hair three-divided. 



Ç. Céphalothorax. — There is one pair of strongly arched eyes, placed on 

 the lateral margin, removed from the front margin to a distance, a trifle longer 

 than their diameter. The céphalothorax is distinctly longer than bi-oad behind 



