162 Annals Entomological Society of America [Vol. V, 
or carina. Each segment from the fourth to the antepenult with four 
carine, one far dorsad on each side consisting of a hemispherical swelling 
chiefly on portion cephalad of suture and bearing the pore, the other 
close to the mesal line and also more thickened cephalad than caudad, 
low, rounded. All segments constricted dorsad and cephalad from the 
transverse suture. (See Pl. X, fig. 6). 
Anal scutum long, widely rounded caudally; a rather weak median 
longitudinal sulcus on anterior portion; a bristle borne each side of mesal 
line near middle of length, and a second pair borne on caudal margin. 
Anal valves long, about equalling the anal scutum; smooth; margins 
elevated; bearing two pairs of bristles close to mesal margin, one pair 
caudal and the other submedian in position. 
Anal scale short and broad, transversely narrowly elliptical. A 
pair of bristles borne on caudal margin, one each side of mesal line. 
Legs rather sparsely provided with short spinscent bristles. 
First legs of male reduced, six jointed. 
Gonopods of male reduced and nearly wholly concealed. 
Segments ad forty-two. 
Length about 16 mm.; greatest width 1 mm. 
Locality: Oroville, Cal. (April, 1911; author coll.). 
Two specimens were secured. 
Family NEMASOMID. 
Genus Nemasoma. 
Nemasoma uta, sp. nov. 
Dorsum dark brown, the color nearly solid in band on caudal por- 
tion of each segment and in some in a narrower stripe adjacent to anter- 
ior margin, the color over remaining portion of segment mostly in a 
network or areolation over a light background, the light spots often 
confluent dorsally into transverse band. Sides light brown, the light 
area extending farthest dorsad at middle of segment, the light area of 
sides limited on all sides by border of dark brown. Each segment 
with whitish spot on median dorsal line. Vertex of head areolated with 
lines of dark brown over a light background, the frons between bases of 
antenne and the eyes dark brown, the area enclosing a pair of lighter spots 
each side of the median line and ventrad of these a second pair of spots 
between bases of antennez at lower portion of the area. Clypeal 
region paler from presence of numerous lighter spots, ventrad and 
laterally yellow, as is also the lateral portion of head. Stipes of mand- 
ibles laterally covered with network of dark brown lines over light 
background. Eyes deep black. Antenne brown, each segment 
whitish proximally and the second article almost wholly so. Legs 
brown, more or less broken with whitish, paler proximally. Ventral 
surface light brown. Anal’scutum very dark, the anterior portion with 
numerous light dots. Anal valves pale along mesal border, elsewhere 
brown. 
Body very slender, attenuated cephalad, narrowest immediately 
caudad of head. 
