MORGAN HEBARD 
425 
We find it necessary, in consequence, to furnish a new com- 
parison between the males of N. ruficeps and N. bnreUii. 
First tarsal joint nor- 
mally“ 
Tegmina with surface 
In length 
Pygidium with projec- 
tions 
Forceps, compared with 
body length 
Both internal mar- 
gins 
Medio-internal, 
proximal tooth 
Internal margins 
armed 
Shaft 
First tarsal joint of 
caudal limbs 
N. ruficeps 
as long as three 
succeeding joints 
smooth or punctulate 
less abbreviate 
triangular elongate or 
minute conical 
shorter to longer than 
minutely denticulate to 
varying degrees 
minute and inconspicu- 
ous 
dorsad and ventrad, at 
middle, or just beyond, 
with a minute tooth 
nearly straight 
scarcely longer than sec- 
ond and third 
N. borellii 
decidedly shorter than 
three succeeding joints 
smooth 
more abbreviate 
blunt or absent 
shorter than 
smooth 
small but striking 
ventrad only, at two- 
thirds distance to 
apex, with a rather 
heavy tooth 
upcurved at distal tooth 
decidedly longer than 
second and third 
In the present series the distal, darkened portions of the femora 
are striking, except in some specimens in which the limbs are 
entirely darkened. The face is darkened, but only in a few 
specimens sharply and strikingly delimited from the paler occip- 
ital portions, which is the normal condition in the Costa Rican and 
Panamanian series. 
Xeolobophora borellii Burr 
1906. Neolohophora borellii Burr, Ent. Monthly Mag., Ser. 2, xvii, p. 113, 
[Near Guadalajara, Jalisco, Mexico.] 
Sonora, Mexico, (C. Lumholtz), 3 cf , 3 9 , [A. M. N. H.]. 
This species is compared with N. ruficeps above, the char- 
acters for borelli being taken from Burr’s original description and 
from the present series. The series before us differs from Burr’s 
description in pronotal coloration and contour of male pygidium. 
These features, we believe, show only variation, in some ways 
analogous to the variation found in ruficeps, not worthy of specific 
or racial distinction. 
In rare specunens, evident distortion of the antennal joints is found on one, 
or both, sides; in one example of borellii, the second, third and fourth joints 
are greatly dwarfed. 
TRANS. AM. ENT. SOC., XLIII. 
