52 DIPLOPODA. 
CLEIDOGONA. 
Cryptotrichus, Packard, Proc. Am. Phil. Soc. xxi. p. 189 (1883) (nomen przocc.) (type C. cesio- 
annulatus, Wood). 
Cleidogona, Cook and Collins, Ann. New York Acad. Sci. ix. p. 41 (1895). 
Eyes well developed, forming a triangular patch on each side of the head. Antenne very long; third segment 
longest. Mandible with 12 pectinate lamella. Gnathochilarium with triangular promentum; segments 
without keels ; setiferous tubercles relatively small. Eighth legs of male consisting of two pairs of processes, 
the posterior articulated to the base of the anterior. Ninth legs of male 5-jointed, the two basal 
segments large, the three distal segments small, armed with a claw and forming a hook. Tenth and 
eleventh legs of male with coxal pouches ; coxa of eleventh with conical processes. Segments 30. 
Distribution. Eastern United States ; Central America. 
1. Cleidogona godmani, sp.n. (Tab. V. figg. 7, 7 a-e.) 
Colour: segments brown, mottled with pale spots, which are sometimes restricted to the area round the 
setiferous tubercles ; median dorsal line also pale; posterior border of segments and also the overlapped 
anterior border pale bluish-grey ; head and antenne infuscate; legs pale, distally infuscate. 
Head hairy ; eyes composed of about 26 ocelli. Segments smooth and shining, but very finely coriaceous, with 
an obliquely longitudinal crest above the infero-lateral angle ; lateral setiferous tubercles larger than the 
rest, except at the posterior end of the body, where the three are subequal. Sterna with vertical anterior 
crest terminating in a downwardly directed spike. Anal tergite with lightly emarginate posterior border 
bearing a pair of long setiferous papille ; two tubercles near the middle of its dorsal surface; anal valves 
with three marginal sete in their upper half. Anal sternite semicircular, with two long sete. 
Leg of ninth pair in male with the basal segment long and divided into two subequal sclerites by a distinct 
joint, which appears to be absent in the other known species of the genus; its inferior edge lightly 
convex, with a basal triangular enlargement; its dorsal edge correspondingly concave, with an anguli- 
form process near the proximal end; second segment fusiform, its upper edge lightly, its inferior edge 
more strongly convex, especially in its distal half; terminal finger-like process consisting of three 
segments, whereof the distal is much the longest. Leg of eighth pair stout basally, with two strong, 
posteriorly directed, subconical prominences; the terminal portion slender, of nearly even width 
throughout, recurved at an obtuse angle of about 100°, and abruptly narrowed and subhamate at the 
apex ; its posterior aspect furnished with a distinct hyaline membranous fringe with frayed edges. 
Length about 20 millim. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (/. H. Smith). 
2. Cleidogona stolli, sp.n. (Tab. V. figg. 8, 8 a-c.) 
Very nearly allied to the foregoing species, which it resembles in colour, but smaller, and differing essentially 
in the secondary sexual characters of the male. Leg of ninth pair in male with basal segment much 
shorter than in C. godmani and undivided, with a larger, more quadrate, inferior basal prominence, a 
more strongly convex inferior edge, and a somewhat sharp constriction near its middle. Eighth leg with 
its basal half relatively much thinner than in C. godmani, and without the large prominences, its terminal 
portion more nearly the same width as the basal, narrowed and pointed apically when seen from below - 
and recurved at a right angle, the hyaline membrane bordering its posterior side not fimbriated. 
Length about 15 millim. 
Hab. GuateMaLa, Volcan de Agua (Sto/¢). 
