16 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



cordate; slightly longer than wide. Body slender; near 8.25 times 

 longer than width of tenth plate; sides but slightly converging cepha- 

 lad. Antennae short; the body 2.5 times longer; articles 28, with 

 third and fourth, seventh and eighth, tenth and eleventh, thirteenth 

 and fourteenth, and sixteenth and seventeenth reduced. Prosternal 

 teeth 3-}-3, of usual relative size and form. None of dorsal plates 

 with posterior angles produced (for precise form see Plate 2, fig. 4). 

 Coxal pores 2, 2, 2, 2 to 3, 3, 3, 3. Anal legs longer than in related 

 species and much more so than in fulmcornis; body but about 2.35 

 times longer; tibia about 5.3 times longer than thick; first tarsal joint 

 8 times as long as thick. Claw of female gonopods nearly straight 

 in adults, less curved than in the other species; outer spine robust, 

 with the inner considerably smaller. Length 7-9 mm. 



DESCRIPTION. Dorsum dark brown, with the caudal plates and 

 sometimes the first one darker; plates often darkened along middle 

 and edges. Head darker, brown to reddish brown; darker on sides 

 about and in front of ocelli. Antennae reddish yellow to yellowish 

 red, the first two to four articles often distinctly less red than the 

 others. Ventral plates dusky yellowish brown to brownish yellow, 

 the caudal ones of reddish tinge. Legs similar in color to venter, uni- 

 form. 



Slender; only very slightly narrowed cephalad from eighth plate; 

 body nearly 8.25 or 8.3 times longer than width of eight and tenth 

 plates, which are of same width. 



Head subcordate; very slightly longer than wide. A shallow longi- 

 tudinal furrow extending caudad between antennae; on posterior 

 portion of plate two longitudinal sulci diverging cephalad and on each 

 side of these chiefly two others which are shorter and extend meso- 

 cephalad; two weak transverse sulci a little in front of caudal margin; 

 lateral borders often set off by weak, fine furrows parallel with margins. 



Prosternum and prosternal teeth as in the preceding species or very 

 nearly so; that is, both scarcely differing from that of the type species, 

 L. fulmcornis, which see. 



Antennae short; about 3.8 times longer than head; body about 2.5 

 times longer than antennae. Articles nearly always 28; of these the 

 third and fourth (or fourth alone), seventh and eighth, tenth and 

 eleventh, thirteenth and fourteenth, and sixteenth and seventeenth 

 are typically more shortened than the others, though in a minor num- 

 ber the two latter are not different in length from the adjacent ones. 



Dorsal plates with caudal and lateral furrows setting off a wide low 

 border as in the other species. Elevated median portion with a 



