392 
The Ohio Naturalist. 
[Vol. VI, No. 1. 
posterior cells. The crossband reaches the ])osterior margin of 
the wing filling out the apex of the anal cell and all the fourth 
and fifth posterior cells with the exception of a small patch at 
the distal end of the latter; the outer margin of the crossband 
starts from the union of the first vein with the costa and extends 
in a somewhat irregular curve to the end of the vein which 
se])arates the third and fourth ])osterior cells. The a])ical sjjot 
fills out the a])excs of the marginal and first .submarginal cells 
and invades the second .sid)marginal, reaching the ])osterior 
border of the wing at the apex of the vein which separates the 
latter cell from the first ])osterior. All the femora black at each 
end, otherwise yellow, tibia black, all of them quite distinctly 
enlarged, but the anterior ]>air more than the others; anterior 
tarsi l)lack, others with the first segment wholly yellow and 
remaining segments with apexes more or less black. First seg- 
ment of the abdomen above narrowly yellow on the sides, second 
segment vellow for its entire width on each side but this color 
narrows toward the front border until at the mid-dorsum where 
the two meet it is very narrow; a mid-dorsal yellow marking on 
the second and third segments, widened and triangular on the 
second and elongate and narrow on the third; the posterior third 
of the fourth segment yellow ; venter with first two segments 
yellow, remainder black. 
Type taken at Santa Lucia, on the Pacific slo])e of Guatemala 
at an altitude of about a tlnnisand feet, February 1, DO.'). 
Chrysops calopterus, n. s]). Female with l)lack body and 
variegated wings. Length, (1 millimeters. 
Face and jialjh yellow, antenna yellow, except the annulated 
])ortion of the third .segment which is black; region of the ocelli 
shining black, frontal callosity yellowi.sh on the disk and black 
above, otherwise front covered with gray pollen. Thorax black 
with indications of stripes on the anterior part ; legs black except 
a broad ring on the distal part of each femur and liasal segments 
of each tarsus which are yellow. Anterior fourth of each basal 
cell, entire costal cell and marginal cell to beyond the stigma are 
infuscated. The black of the crossband and apical spot are 
much l>roken up and the hvaline triangle is crossed and 
encroached upon by dark markings; there is a very dark quad- 
rangular .s])ot at the furcation of the third vein; the discal cell 
is hyaline with an irregluar dark ])atch at its middle; the ])os- 
tcrior margin of the wing is infuscated all the way to the fifth 
po.sterior cell and more pronounced at the intersection of the 
veins; the veins at the inner ends of the discal, first, fourth and 
fifth ])osterior cells are widely margined with black. None of the 
cells of the wing exce])t the costal are entirely infuscated, and 
none are entirely hyaline except the axillary. Abdomen black 
