140 
BRAZILIAN ORTHOPTERA 
are the same in the whole series, except for the presence of five 
spines on the dorsal internal margin in one paratype, but the 
intercalated spiniilations range from 2, 2, 1, 0 to 3, 3, 1, 0 on 
the externa! margin; 3, 2, 1-3, 3, 0-3, 3, 2-2, 2, 1-3, 1, 0, 1 on 
the internal margin. It is evident from these figures how rela- 
tively valueless the spinulation count is as a diagnostic feature. 
We take pleasure in dedicating this species to Mr. W. M. Mann, 
to whose energy the extent of the Stanford Brazilian Expedition 
insect collection is due. 
Amblyrhethus natalensis new species (Plate IV, figs. 33, 34, 35, 36 and 37.) 
This species has the cephalic tibiae supplied with foramina on 
both faces, as is the case with ca'pitatus and the above described 
manni, but the form of the apex of the ovipositor is more like, 
yet distinct from, that found in A. hrevipes and depressus (Saus- 
sure). The present species differs from all the known forms of 
the genus, however, in having the dorsal surface of the caudal 
metatarsi armed on the external margin with three, and the inter- 
nal margin with two spines. 
Type. — cf ; Natal, State of Rio Grande do Norte, Brazil. 
(Stanford Brazilian Expedition; W. M. Mann.) [Acad. Nat. 
Sci. Phila., Type no. 5333.] 
Size medium : form robust, but weakly depressed : surface of body and limbs 
thickly and closely adpressed pilose. Head broad, moderately depressed, the 
caudal width of the head subequal to the cephalic width of the pronotum; 
occiput gently arcuate caudad, moderately declivent cephalad, there dis- 
tinctly, though broadly, excavate: rostrum rectangulate when seen in lateral 
outline, its least width subequal to the breadth of the proximal antennal joint, 
with a distinct, broad and rounded medio-longitudinal sulcus, which is weakly 
continued to the clypeal suture: ocelli placed in an arcuate line; the median one 
located at the base of the rostrum in the sulcus, subcircular, of medium size; 
lateral ocelli subcircular in outline, faintly smaller than the median one, re- 
moved from the eyes by hardly more than their own diameter and placed close 
to the margin of the antennal scrobes: palpi very similar to those of manni, 
described above : eyes very similar to those of manni, the ventro-cephalic angle 
of the basal outline, how'ever, more narrowly rounded: antennae at least two 
and one-half times as long as the body, subincrassate. Pronotum weakly 
•transverse, the greatest caudal width equal to one and two-thirds times the 
median length of the same, lateral borders of the dorsum subparallel: cephalic 
margin of disk distinctly angulato-arcuate emarginate; caudal margin of disk 
faintly arcuate, almost imperceptibly sinuate in the humeral area; dorsal 
cephalic and caudal margins broadly cingulate: lateral lobes with their greatest 
