NO. 1169. THE FAMILY STBIABIIDJE— COOK. 671 



Anal segment without carinse, broadly trilobed. Under tlie apex 

 witli two papilla'. 



Tliird pair of legs of males with the coxa- ])roduced medianly into 

 long, Ha.sk like proces.ses whose apices are accommodated by an exca- 

 vation in the posterior face of the coxa' and second joint of tlie second 

 pair of legs. 



Ill males both pairs of legs of the eighth segment are modified into 

 a complex copulatory apparatus, partially concealed and normally not 

 projecting l>elow the sides of the body. 



Number of segments of adult, 30; younger stages unknown. 



JDixtribution. — Temperate North America. 



Genus STRIARIA Bollman, 

 Slriaria I'.oi.lman, Ann. N. V. Acad. .Sci., 1888, IV, p. 108. 



Body small, about nine times as long as broad, cyliiidric subfusiform, 

 narrowed [posteriorly and behind the first segment. Head somewhat 

 narrowed at the ant(Mina'. 



Vertex granular roughened, with evident longitudinal and transverse 

 sulci. 



Labrum in males jnoduced at each end into a long decurved spine. 



Eyes x>oorly developed, of few ocelli (."> to 9) differing in size and with- 

 out regular arrangement. 



AntenuiL' geniculate, of moderate length, joint longest, the others in 

 order of length. 



Mandibles with 10 pectinate lamella-. 



Cardo of gnathochilarium beset with spines. 



Promentum small, triangular, slightly longer than broad. 



First segment more than twice as long as the second, semielliptic, 

 decurved at the sides, hood-like, concealing the head, strongly tuber- 

 culate, medianly and posteriorly with 10 longitudinal carina-; median 

 carina; short, the others gradually longer; anterior and lateral margins 

 raised. 



Subse<|uent segments with 12 dorsal and lateral and 2 ventral (-arinaj, 

 the latter separated from the others by a considerable ecarinate space. 

 Surface not occupied by the carina; rough with coarse, scattered, spinose 

 tubercles. 



Supi)lementary margin regularly pectinate with short, broad teeth. 



Last segment projecting beyond the valves, ecarinate, very strongly 

 tuberculate. posteriorly tridentate; the teeth broad and blunt, the inci- 

 sions narrow, moderately deei); two long-conic, translucent pajtilla- at 

 the base of the projecting apex. 



Anal valves much flattened, strongly tuberculate, with 3 bristles. 



Preanal scale semicircular, rough, with 2 bristles. 



Pedigerous lamina' broadly shield-shaped, inflated in front at apex 

 and strongly tuberculate. 



