BRITISH SPECIES OF PHALANGIDEA OR HAREEST MEN. 171 



segments traceable, if at all, only by impressed lines or slight 

 furrjws. Anal plate without accessary lateral portions ; lateral 

 pores on the caput present and conspicuous. Epistoma tri- 

 angular, 



SUB-FAMILY i. SCLEROSOMATIN.E. 



In this sub-family there is only one genus as yet known in 

 Britain Sclerosoma Luc. 



GEN : SCLEROSOMA (Lucas). 

 HOMALENOTUS (C. Koch and Meade). 



Epidermis hard and coriaceous ; the division of the cephalothorax 

 and abdomen being distinctly marked by a deep transverse 

 indentation. Cephalothorax pointed before, sides parallel behind, 

 and ending with a strong, vertical, or oblique corneous point or 

 spike. Falces very small, upper surface flattened, that of the 

 abdomen slightly convex along the middle, of a somewhat oblong 

 oval form roundly truncated behind and armed with spines or 

 pointed tubercles. Eye-eminence small and armed with spines 

 or points, palpi short. Legs short, moderately strong. 2nd pair 

 longest, but least strong. Metatarsi undivided. Tarsi, 1 and 4, 

 11 -jointed; 2, 18-jointed; 3, 10-jointed. 



SCLEROSOMA QUADRIDENTATUM (Cuvier). 



Homalenotus guadridentatus (Meade). 

 PI. B, fig. 4. 



Length from If to 2 lines, its surface covered slightly and 

 roughened with yellowish scales. The colour of this species 

 is yellowish brown ; it is often of a deeper and more suffused hue, 

 owing probably to its having been for a longer time in contact 

 with the soil. On the upper side of the abdomen are four rows 

 of black spots, each containing a strong tubercle surmounted by a 

 short pale bluntish tubercular spine. These thus form two nearly 

 parallel, longitudinal, central rows of four each and a sub-marginal 

 row on each side of the same number, but less strong, besides a 

 posterior transverse marginal row of four more almost equally 



