Packard,] 190 [June 16, 
In describing S. cwsoannulatus, forming the type of the genus, Dr. 
Wood, in his ‘‘Myriopoda of North America,’’ p. 194, remarks: ‘ This 
species ought, perhaps, to be the type of a new genus ; but, asI am unable 
to make out the generic characters in this family, it seems preferable to 
retain it in this for the present.’’ 
The genus may be recognized by its slender antenns, its smooth scuta, 
and three transverse rows of setiferous pale dots; in these respects differ- 
ing from Lysiopetalum and Pseudotremia, 
CRYPTOTRICHUS CAJSLOANNULATUS (Wood). 
Spirostrephon cusioannulatus Wood, Myr. N. Amer,, 194, Pl. ii, Fig. 14, 
1865. 
Pseudotremia vudit Cope, Proc. Amer. Phil. Soc., xi, No. 82, 180, 1869. 
Two 2. Hyes equilaterally triangular, convex, prominent, black. Body 
horn-brown in color, stained and spotted with darker brown. Head and 
antenne concolorous, being dark purplish-brown ; antennex pale at the 
articulations of the joints. Feet slightly paler than the antennx, whitish 
at the articulations. Segments (scuta) dark brown on the posterior edge, 
with three pale rounded distinct spots on each side, and a fourth spot be- 
low, or eight in all; from the centre of these three upper spots, on each 
side, arise short microscopic sets, A median pale dorsal impressed line 
along the whole body, which dilates on the anterior part of each segment 
into a short, broad diamond-shaped area, The extreme hinder edge is 
smooth and pale, giving a transversely-banded appearance to the body. 
In one of the two specimens the lower white dots are, towards the head, 
more or less confluent, forming an irregular lunate spot. Length 15™™, 
Two 2 specimens were kindly collected for me by Mr. C. L. Herrick, 
either at Culmana, Ala,, or at Ocean Springs, Miss., the bottle containing 
Myriopods from both those localities. Dr. Wood’s specimens were from 
Allegheny county, Penna. ; and Prof. Cope’s examples were from Penn- 
sylvania. 
This isa rather characteristic form, owing to the transverse series of 
light dots, and the linear pale transverse line on the hinder edge of each 
segment, so that the specific name is well chosen. What Dr. Wood is 
disposed to regard as ‘‘ pores,’’ appear to be slight tubercles, bearing sete 
on the posterior half of the body. Ihave been thus far unable, with a 
half-inch objective to detect any repugnatorial pores in this genus or any 
except Lysiopetalum, but am not disposed to deny their existence. The 
hairs are minute and mostly rubbed off in alcoholie specimens which have 
been transported far. My specimens agree so well with Prof. Cope’s de- 
scription that I do not doubt but that his Pseudotremia vudii is this species. 
There seem to be no difference of importance. The dorsal impressed line 
in my specimens is a faint crease, being neither a ‘‘keel’’ or ‘ groove.’’ 
Cope rem irks that it has twenty-nine segments ; his specimen was eleven 
lines in length. 
sini — 
{4~o 
