116 DIPLOPODA. 
1. Oncodesmus granosus. 
Polydesmus granosus, Gervais & Goudot, Ann. Soc. Ent. Fr. sér. 2, il. p. xxvii (1844) *. 
Cyrtodesmus granosus, Gervais, Ins. Apt. iv. p. 93 (1847) ®. 
Oncodesmus granosus, Cook, Brandtia, 1896, p. 28°; Pr. U.S. Nat. Mus. xxi. p. 458 (1898) *; 
Silvestri, Boll. Mus. Torino, xi. p. 6 (1896) ’. 
Colour very dark brown, tubercles clearer pale brown; cylindrical portion of segments white in front and 
below, but the posterior portion dark and pigmented, with three pale patches, one median and one on 
each side; legs and anal valves white; keels quite vertical ; body compressed. © 
Length about 16 millim., width 4. 
Hab. Panama °.—Cotomsia!? (Mus. Brit.). 
The only example of this form that I have seen is the dried type in the collection 
of the British Museum. It is partially coiled and therefore cannot be critically 
examined. The specimen from Panama referred by Silvestri to O. granosus may belong 
to a different species. 
CRYPTURODESMUS. 
Crypturodesmus, Silvestri, Boll. Mus. Torino, xii. no. 277, p. 1 (1897) ; Brdlemann, Ann. Soc. 
Ent. Fr. xvii. p. 276 (1898). 
Katantodesmus, Attems, Denk. Akad. Wien, lIxviii. p. 885 (1900). 
Segments coarsely granular or tubercular above; keels, except of the second and (?) nineteenth segments, 
strongly shouldered at the base of their anterior border, but without any deep notch close to the base of 
their posterior border. Pores sometimes, at all events, present upon the dorsal area of the keels. 
Median tergal area and keels of the nineteenth segment coalesced to form a rounded shield-like sclerite, 
which completely covers the twentieth; tergal plate of the latter narrow and posteriorly pointed. 
Distribution. Mexico and tropical parts of South America. 
There appears to me to be no doubt that Attems was correct in his surmise that his 
genus Katantodesmus is identical with the earlier described Crypturodesmus. Attems 
refers Crypturodesmus (Katantodesmus) to the Oniscodesminz and not to the Cyrto- 
desminz, apparently because the caudal process is narrow and pointed, as it also is in 
the species of Oniscodesmine known to him. But the width of the tail in Ligiodesmus 
above described, a genus apparently resembling Oniscodesmus in other particulars, 
shows that the character has not the value assigned to it by Cook and Attems. 
Crypturodesmus is unknown to me except from descriptions and figures; but its 
affinities appear to me to be rather with the Cyrtodesmine than with the 
Oniscodesmine. 
It may be added that neither Attems nor Silvestri could detect the pores in 
the species available for examination, but that Brdlemann discerned them in his 
C. verrucosus from Venezuela. Possibly this species should form the type of a special 
genus. It may be added that Brdélemann, in defiance of laws of nomenclature, made 
