E. B. WILLIAMSON 
219 
Neoneura biiinearis Selys (Figs. 3, 4, o, 33, 34, 35, 36, 77, 7.S and 100.) 
Abdomen, cf 24 to 20 mm., average 25; 9 23; hind wing, cf 15 to 10, 
average 15.7; 9 10 to 17. 
cT. — Genae yellow. Labnnn, rhinarium, nasus and Irons in front greenish 
yellow; labrnni with a metlian basal blaek spot; nasus with a blaek spot on 
either side in front and a tlusky longitudinal median stripe, the latter often 
wanting. Frons al)ove and vertex with an intricate and variable jjattern of 
greenish yellow and blaek. The palest j)attern is as follows; each ocellus is 
surrounded by black, but separated by included i)ale lines; from the body of 
black about the median ocellus three bars of black arise, one anteriorly in the 
median line and one on either side; the median bar branches into a trident, the 
middle prong of which alone reaches the angle of the frons; the lateral bars 
from the ocellus, one on either side, run outward and forward to the angle of 
the frons, then backward and outward to the antenna and posterior to it where 
each branches, one short branch ending against the eye, the second branch, 
longer and narrower, ending oj)posite and near the lateral ocellus; directly 
posterior to this termination of the longer branch is a black spot at the end of 
the occipital crest; just posterior to the shorter branch, which ends against 
the eye, is a large round black spot which touches the eye and is produced 
posteriorly as a narrow black border against the eye; posterior to this large 
round black spot is a short wide transverse bar of black at the posterior border 
of the vertex; the occipital crest is black at the center. In the maximum black 
pattern the following changes have taken place; the lateral branches of the 
trident fuses each on its outer side with the lateral l)lack bar from the median 
ocellus, leaving a small squarish j)ale spot included; the black areas about the 
ocelli, the occipital crest and against the eyes fuse with the resulting pattern 
in pale; a very small spot between and another on either side in front of the 
lateral ocelli; from each lateral ocellus a pale bar runs toward the antenna, 
reaching about two-thirds the distance; this pale bar at its posterior end di- 
lated into a spot from which three liranches arise, a short one running around 
and behind the ocellus, another running forward and outward toward the ej-e 
and the third running backwartl and outward toward the eye; opposite each 
termination of these two last branches is a pale spot nearly against the eye; 
the black thus liounded by these two branches and the two S])ots is the large 
round black spot against the eye, described above in the pale color i)attern. 
Antenna with second joint black, pale at apex; third joint brown, paler bas- 
ally; remainder brown. Rear of head with a yellow transverse bar above, not 
reaching the eye; below this a broad j'ellow border against the e}^e; remainder 
black. 
Prothorax with front lol)e black, anterior Ijorder and a large median spot, 
yellow; middle lobe yellow with a wide median longitudinal black band which 
is greatly widened at the anterior border; hind lobe black, posterior edge nar- 
rowly yellow except in the median line. Proi)leuron black, yellow or dusky 
at the extreme lower edge. 
Thorax yellow and black, the yellow jialer on the sides and below; only 
slightly variable as shown by specimens before me (see figures 3 and 4). 
TRANS. AM. ENT. SOC., XLIII. 
