MILLIPEDS OF PANAMA—LOOMIS OI] 
Genus Detodesmus Cook 
Detodesmus Cook, Brandtia, fase. 5, p. 28, 1896. 
Nores: On the basis of differences in the gonopods shown in il- 
lustrations by both Cook (Proc. U.S. Nat. Mus., vol. 21, pl. 30, figs. 
la-c, 1898) and Brolemann (Ann. Soc. Ent. France, vol. 67, pl. 26, 
figs. 127-141, 1898), Professor Chamberlin (1941) pomted out the mis- 
identification of a Venezuelan milliped, which Brolemann reported 
as Detodesmus (Oniscodesmus) aurantiacus (Porat) Cook, and_ pro- 
vided it with a new specific name, Detodesmus brolemanni, a step 
obviously needed. Professor Chamberlin, however, hardly went far 
enough for the first of Brolemann’s figures shows an animal with 
areate posterior border on segment 2, a condition specifically denied 
by Cook for the genus Detodesmus and sustained by his illustration 
(pl. 30, fig. 1c), of the genotype species. Prof. Chamberlin recog- 
nized the nonareate condition of segment 2 in Detodesmus, for he used 
the areations of Mesesmus as a separating character, but he seems to 
have overlooked the implication of Brolemann’s figure. Thus the 
species to which the new name brolemanni was given was incorrectly 
assigned to Detodesmus, and it is now proposed to return it, for the 
time being, to the genus where Brolemann originally placed it, as 
Oniscodesmus brolemanni. Cook neither described nor illustrated 
the gonopods of the supposed type of Oniscodesmus oniscinus (Gervais 
and Goudot), the genotype, which he saw in the British Museum, 
but illustrated those of a species he described as Oniscodesmus mi- 
crurus. Certainly micrurus and brolemanni are not congeneric, but 
it cannot be determined which, if either, is congeneric with O. onis- 
cinus until its type specimen is examined, when the position of these 
two species may be evaluated. 
Chamberlin (in Univ. Utah Biol. Ser., vol, 11, No. 5, p. 46, fig. 
80, 1950) described Detodesmus tingonus as a new species from Peru, 
but the illustration of the gonopod (fig. 80) precludes the generic 
assignment. Instead, the species is believed to typify a new genus, 
to which the name Huanucodesmus may be applied. Also in the 
above paper, Detodesmus aurantiacus is credited to Colombia, where- 
as I believe it has been reported only from Venezuela. 
Family Peridontodesmidae 
Genus Peridontodesmus Silvestri 
Peridontodesmus Silvestri, Ann. Mus. Civ. Stor. Nat. Genova, vol. 36, p. 197, 1896. 
Peridontodesmus species 
A 19-segmented male, Cerro Campana, Panama, March 16, 1958, 
G. B. Fairchild and H. F. Loomis, is the first record of this genus in 
Panama. 
