E. B. WILLIAMSON 
231 
paler, without definite i)attern; nasus with an ill-defined or wanting black sjiot 
in front on either side (well defined and with a median posterior sj)ot in 
specimen from Pard). The following description of frons above and vertex 
applies to sj)ecimens from British Guiana only; dull reddish brown, with 
obscure ill-defined markings; frons above with an obscure or wanting black 
central spot; in one specimen a large triangular pale j^ostocular spot on 
either side, this spot broken into two or three smaller spots in another speci- 
men, reduced to a vestige in another and entirelj’ wanting in a fourth speci- 
men; a short transverse black bar on either side of the occi])ital crest on the 
rear of the head above; usually a trace of black at either end of the occip- 
ital crest, and a larger spot opposite it against the eye. The specimen from 
Pard is strikingly different: the head above is reddish yellow with an exten- 
sive and definite black pattern as follows: from the second joint of the an- 
tenna a bar runs forward and inward a short distance, then curves broadly 
backward and inward to meet its fellow of the opposite side, forming a low 
broad U, which is produced forward somewhat in the median line; black be- 
tween and posterior to the ocelli, but not reaching the occipital crest; a small 
median pale spot just behind the lateral ocelli ; from the median ocellus a short 
bar runs outward on either side not quite half way to the eye; from the lateral 
ocellus, but narrowly separated therefrom, an irregular bar runs outward and 
forward to meet the ej'e at about the level of the median ocellus; posterior to 
this bar the vertex is entirely black with the following exceptions: a large pale 
spot against the eye at the level of the lateral ocellus; a much smaller spot 
posterior to it, against the eye and near the posterior border; and a more or 
less quadrangular spot in the median line, lying in front of the occipital crest 
which is included. Antenna dull brown; apex of second joint and basal half 
of third joint paler (British Guiana); second joint black on inner face and third 
joint not paler basally (Par^). Rear of head more or less black about the 
foramen, pale adjoining the ej'es (British Guiana); largely black, the pale 
border at the ej-es narrow (Pard). 
Prothorax light dull brown, apparently without definite color pattern, an- 
terior and posterior edges slightty paler (British Guiana); largely black, red- 
dish brown as follows: anterior border; a large semicircular spot on the lower 
side of the middle lobe and a slightly smaller spot behind this on the posterior 
border of the middle lobe; and the lateral tips of the hind lobe (Pard). Pro- 
pleuron light dull brown. 
Thorax light and dark brown with black markings (see fig. 13 and fig. 14); 
in the specimens from British Guiana several or no black markings along the 
mid-dorsal line; in one specimen from Briti.sh Guiana an abbreviated black 
line on the second lateral suture. 
Abdomen red; segment one with a small basal dorsal black spot, and in- 
ferior lateral elongated oblique spot, and above it a smaller apical one; two 
with an obscure inferior lateral stripe above the accessory genitalia, and an 
oblique spot, sometimes wanting, on either side of the median line at about 
two-thirds the length of the segment, sides below at extreme apex dusky: 
three to six with the extreme aj)ex black ringed, seven or eight to ten duller, 
TRAXS. AM. EXT. SOC., XLIII. 
