428 bulletin: museum of comparative zoology. 



Anal pores present, small. 



Anal legs in male strongly crassate; densely clothed with fine, short 

 and straight hairs; ending in a small short claw (Plate 2, fig. 2). 



Pairs of legs (male) 67. 



Length 41 mm.; greatest width 1.4 mm.; length antennae 2 mm. 



Localities. — Watervalley, Miss. ; Lula, Bremen, and Tallulah 

 Falls, Ga. ; Raleigh, Saluda, Linville Falls, and Brown's Summit, N. C. ; 

 Altapass, Russellville, and Johnson City (also reported as L. ruber 

 from Mossy Creek, and Beaver Creek by Bollman), Tenn.; Lynch- 

 burg, Va.; Lexington, Ky. 



The description above is of a male from Lexington. 



I am unable to find grounds for regarding the specimens here listed 

 as bidens as constituting more than one species, although there is 

 considerable variation in some features. By far the majority of 

 females have 71 or 73 pairs of legs; but others have 75, 77, 79 and one 

 has 81 pairs of legs and all without showing any structural differences 

 of importance. The males have mostly either 67 or 69 pairs of legs. 



Agathothus Bollman. 



Bull. 46, U. S. N. M., 1893, p. 166. 



Frontal plate present. Basal plate wide. Prebasal plate in type 

 species absent. Antennae filiform. Dorsal plates not bisulcate. 



Labrum free; tripartite, with the middle piece very large, bowed 

 outward, and fringed with spines along its free margin ; lateral pieces 

 with margin smooth or weakly crenate, not armed, overlapped at 

 mesial ends by the middle piece. 



Outer process of first maxillae biarticulate, without lappets, apical 

 joint somewhat membranous distad; inner process not separated, 

 coxae not separated by median suture. Coxae of second maxillae 

 completely fused; palpus ending in a small, simple claw. 



Prosternum without chitinous lines; anteriorly medianly emargi- 

 nate. Claw of prehensors wholly unarmed, constricted at base and 

 excavated above, being thin dorso-ventrally at proximal end (Plate 

 2, fig. 11). 



Ventral pores in a transverse band in front of caudal margin. 



Last ventral plate very wide. Coxopleurae with a number of 

 moderately large pores. 



Anal pores in type species concealed. 



Anal legs composed of six joints, terminating in a claw. 



