new Oriental Opiliones. 289 



character, however, the genus may be distinguished from 

 Siro by having the tarsi composed of a single segment, 

 whereas in Siro the proximal end of the tarsus is, according 

 to Simon (' Arachnides de France,' vii. p. 144^ pi. xxii. 

 figs. 10-13), separated off. Also in Siro the eyes appear to 

 be marginal as in Siylocellus, whereas in Pettalus the two 

 tubercles are nearly as far from the margins as they are from 

 each other. Miopsah's, Thor. (Ann.Mus. Genov. xxx. p. 381, 

 1890), will probably prove synonymous with Pettalus. 



Some facts connected with the structure of the stomotheca 

 and sternal surface o£ the carapace are perliaps worth re- 

 cording. The mawillce lie vertically between the coxfe of 

 the first pair of legs, their lip-like apices just appearing at 

 the hinder end of the stomotheca ; these lips, which are 

 defined by a suture, are the maxillary lobes. The posterior 

 ends of the first cox£e close the stomotheca behind, since they 

 just meet in tlie middle line ; and lying alongside of their inner 

 edges is a narrow sclerite, ending below in a lip-like piece, 

 which appears to represent the maxillary lobe of this coxa. 

 The coxce of the second pair end in long processes, which 

 meet in the middle line behind those of the first and separate 

 them from a large pentagonal plate lying between the coxse 

 of the third and fourth appendages. This plate is furnished 

 with a pair of conical elevations, and in the middle line behind 

 them there is a small crescentic genital aperture. 



Pettalus h-evicauda^ sp. n. 



Colour (in alcohol) a uniform yellowish brown. 



Body oval, short, not much longer than broad, broadest at 

 the posterior border of the carapace, covered above and below 

 with somewhat coarse granulation. 



Carapace with its posterior border mesially convex above, 

 lightly concave at the side ; ocular tubercles conical, broad 

 and circular at the base ; the margin just above the base of 

 the mandibles prominent. Upper surface of abdomen com- 

 posed of eight distinct plates, separated by grooves, the 

 grooves scarcely granular, the granules along the anterior and 

 posterior edge of the plates coarser than the rest ; the last 

 segment much smoother, marked with a deep longitudinal 

 groove and a deep posterior notch ; beneath the bilobcd plate, 

 and separating it from the circular anal plate, there is a 

 crescentic tergite, the sternite of which is a narrow plate 

 immediately in front of the anal sclerite. liim of stigmata 

 forming nearly a complete circle. 



Appendofjes. — Mandihles with basal segment cylindrical, 

 Ann.& Mag. Is. Bist. Ser. 6. FoZ. xix. 21 



