HIRST— ARANEjE, OPILIONES AND PSEUDOSCORPIONES 391 



the legs, and also in the armature of the dorsal surface, but the last-mentioned character 

 is subject to considerable variation in the species of Ibalonius and must be used with 

 caution. 



4. Ibalonius lomani, n. sp. 



Colour dark brown, the tarsi pale yellowish. 



Scutum strongly convex, and with its surface roughened throughout by minute 

 granules ; the grooves ill-defined. Four pairs of long thorns are present, besides the long 

 median anterior thorn ; the first pair is situated in the hinder part of the cephalothoracic 

 area, a little in front of the slight groove which indicates the boundary between cephalo- 

 thorax and abdomen ; the remaining pairs occur on the second, third and fifth abdominal 

 segments respectively. The thorns of the first and third pairs are very long, those of the 

 third pair being slightly the longest, and much further apart from one another than is the 

 case with the others. 



Ventral surface. Coxse more closely granular than is the case in /. inscriptus ; the 

 sternites are also granular. 



Palp slightly shorter than the body ; its armature is exactly similar to that of 

 /. Jlavopictus, n. sp. 



Legs of moderate length. Femur of first furnished with a row of tubercles and spines 

 both above and below. Number of tarsal segments 3, 8, 5, 5. 



Measurements in mm. Length of body 3'25, of palp 3. 



Material. A single specimen of the male sex from Silhouette. 



Remarks. This species is closely allied to /. inscriptus, Lorn., chiefly differing in that 

 the surface of the scutum is closely granular ; the spinal armature of the scutum is also 

 different. 



Genus Sitalces, Sim. 



Scutum convex, the cephalothoracic area being a little more elevated than the rest of 

 the scutum and separated from it by a well-marked groove. Ocular tubercle high and 

 conical and armed with two or three conspicuous prominences, which are arranged in 

 a longitudinal series ; eyes situated at the base of the tubercle. 



Palp rather weak and armed with spines, which, with the exception of the two 

 strong basal spines of the femur, are not borne on processes. 



Legs. Femur of first leg pectinate. 



6. Sitalces gardiueri, n. sp. (Fig. 9). 



Colour pale yellowish brown. Scutum faintly marked with an irregular fuscous 

 pattern : the posterior plates of the ventral surface (and the last abdominal plate) are also 

 fuscous. 



Scutum. Grooves rather indistinct, with the exception of tli.it which forms the 



50—2 



