LICHOMOLGUS. 41 



1. LICHOMOLGUS FUCICOLUS, Brady. PI. LXXXV, figs. 



111. 



Macrocheiron fucicolum, Brady. Nat. Hist. Trans. Northumber- 

 land and Durham, vol. iv, p. 434, 

 pi. xviii, figs. 918 (1872). 



Lichomolgus fucicolus, Brady & Robertson. Ann. and Mag. Nat. 

 Hist., ser. 4, vol. xii, p. 140 (1873). 



Body elongated, first segment equal to more than 

 half the length of the cephalothorax, which tapers 

 gradually to its last joint ; the abdomen in both sexes 

 is composed of five joints (figs. 1, 10), but in the male 

 the first joint has its lower angles produced into two 

 short sharp spines, and is much enlarged both in 

 length and breadth, being as long as the rest of 

 the abdomen, including the caudal segments ; in 

 the female the first abdominal segment is formed 

 by the union, often imperfect, of the first and second 

 somites (the line of separation between the two being 

 quite visible in immature specimens), and, like that of 

 the male, is about equal in length to the remaining 

 half of the abdomen, the angles of the true first somite 

 at the line of junction being, however, smoothly 

 rounded off. Rostrum short and sharp ; anterior 

 antenna (fig. 2) slender, 7-jointed, nearly as long as 

 the first body segment, second, fourth, and fifth joints 

 longer than the rest, third joint shortest; the whole 

 limb beset at the apex and on the outer margin with 

 rather short slender hairs. Posterior antenna (fig. 3) 



