410 Mr. K. H. Meade on the British species 0/ Phalangiidse. 



name however in consequence of its having been applied by 

 Dr. Leach to the species histrix, which may be considered as the 

 typical one; and also because the i\t\Q Acantholophus^ is not 

 characteristic of the genus, the ocular crest being only furnished 

 in most species with short spines, and not by any means con- 

 spicuous. 



3. Opilio agrestisj n. s. 



Corpore raurino, fusco et albo variegato ; vitta dorsali indistincta : 

 dentibus frontalibus brevibus et crassis : eminentia oculifera 

 fere Isevi : pedibus fusco annulatis. 



Long. 2 lin. 



This species closely resembles Opilio ephippiatus in general 

 form ; it is however rather smaller, and has three much shorter 

 and thicker teeth on the front of the cephalothorax, the middle 

 one of which is longer than the others. The lateral margins are 

 free from crenulations, but each has two short stout teeth, one 

 placed between the first and second, and the other between the 

 second and third pairs of legs. The eye-eminence is almost 

 devoid of tubercles or teeth on the crest. 



The colour of this species is darker than that of O. ephippiatus; 

 the dorsal band is distinctly marked on the cephalothorax, but 

 becomes indistinct upon the abdomen, which is marked by trans- 

 verse rows of dark brown stripes intermingled with white spots. 

 The legs are short and feeble^ and annulated with blackish-brown 

 marks. 



The male is similar to the female, but has the body smaller 

 and darker, and the legs longer. 



This is a very common species, and is met with in the same 

 localities as the preceding. 



4. Opilio terricola, Koch. 



Corpore luteo, rubro alboque punctato; vitta dorsali tenuiter 

 notata ; eminentia oculifera dentibus longis cristata ; palpo- 

 rum articulis tertiis quartisque digitatis. 



Long. 1| lin. 



Opilio terricola, Koch, Die Arach. B. iii. p. 48. t. 90. f. 204. 



Body rather short ; cephalothorax equal in width with the 

 abdomen, the back of which is a little elevated ; front margin of 

 cephalothorax straight and rather wide ; three long and slender 

 teeth project forwards and a little upwards from its centre, the 

 middle tooth being considerably longer than the others ; the 

 external angles, where the spiracles are seated, are also furnished 



* From oKavda, a thorn, and X6(f)0Sf a crest 



