20 
HERCODESMIDAl. 
Family HBRCODESMID^, nov. 
These agree with the West Indian forms in that the basal joint of 
the copulatory leg is inflated to contain and conceal the apical struct- 
ures, but differ in the presence of dorsal processes or crests, in the loca- 
tion of the pore at the posterior corner of the carina on a special lobe 
or tubercle, and in having the last segment greatly reduced and con- 
cealed in the penultimate. The dorsal surface, and especially the 
carinae, show in the American genera radiating lines and areas which 
in the Hercodesmidse have disappeared, except a slight trace on the 
carinae. The West Indian forms discussed above it is proposed to 
arrange in a separate family accompanied, how^ever, by a single 
African genus, Choridesmus Ck., known only from Liberia. 
Family CHYTODESMID^, ?iov. 
In all these genera the pore is located at the base of the posterior 
lobe or area of the carina ; the pore is thus remote from the margin, 
in the middle or somewdiat toward the posterior corner of the carina. 
The antennae, while distinctly clavate, are long and slender in com- 
parison with those of the Pterodesmidae. In all Chytodesmidae there 
is a more or less defined median depression or sulcus which does not 
appear in the Pterodesmidae. The type of the new genus Chytodes- 
mus is Ch. laqueatus (Ksh.), a Cuban species in the Berlin Museum. 
The dorsum is strongly and evenly convex, the carinae being narrow 
and depressed in the direction of the dorsal arch. Segments ornament- 
ed with three transverse rows of convex, smooth and shining areas 
which are rounded cr polygonal in shape, only those of the carinae 
showing the radial form. Pores large and distinct ; all poriferous 
carinae have four marginal areas, the others three. 
Genus Stictodesmus, nov. 
The type is St. creper, sp. n., from Bogota, in the Berlin Museum ; 
it is the smallest of the three “ types ” of Cry ptodesmus alatus (Ptrs). 
Much smaller and less convex than Chytodesmus, and with the dorsal 
ornamentation consisting of a few poorly defined large areas. The 
head is not entirely concealed by the first segment. Pores with a 
rather large orifice opening laterad just in front of the last marginal 
sulcus of the carina ; all poriferous carinae with four lobes, the others 
with three ; the first notch or sinus of the posterior margin on each 
side is very deep. Length 4.2 mm. ; width about .8 mm. 
Genus Docodksmus Cook, 1896. 
Brandtia, p. 5. 
Type D. vincentii (Poc.), from St. Vincent, West Indies, in the 
British Museum. The form of the segments and great width of the 
