44 OHIO STATE ACADEMY OF SCIENCE. 
CHRYSOPS UNIVITTATUS Macquart. 
Length 6-8 mm. Basal segment of antennae yellow, second a little 
darker and third nearly black; hyaline triangle of the wing reaches or 
nearly reaches the second vein; the apical spot is large, occupying all the 
marginal cell beyond the cross band, the broad apex of the first sub- 
marginal, all the second submarginal except a small patch at base and the 
apex of the first posterior; the cross band entirely fills out the fourth. 
posterior cell. 
Female: Frontal callosity black, face yellow, its lateral callosities 
brown or black; first basal cell brown; second basal cell with a very 
little brown at base; posterior branch of the fifth vein narrowly mar— 
gined with brown, abdomen with a middorsal yellow, longitudinal stripe 
with a black stripe of about the same width on either side of it; outside 
the black stripes the abdomen may be entirely yellow, or all but the 
first two segments may be dull black, or there may be a narrower black 
stripe beginning on the third segment and continuing onto the fourth 
and fifth segments; the last three abdominal segments are often blackish 
obscuring all stripes in that region. 
Male: Second basal cell of wing brown on its basal two-thirds and 
the fifth posterior more brown than in the female; last three segments of 
the abdomen black, first four with a middorsal yellow stripe, on each side 
of which is a wider black one; and outside of the latter on segments 
three and four is an additional narrow black stripe. The three specimens 
of this sex I have present no variations. It looks much like the female 
and is easily associated with it. 
Habitat: A common species in June in all parts of the state. 
The males have been taken on various flowers. 
CHRYSOPS VITTATUS Wiedemann. 
Length 8-9 mm. Face, palpi and base of antennae yellow; thorax 
dorsally with four bright yellow longitudinal stripes with brown intervals 
“separating them; scutellum yellow; hyaline triangle of the wing rather 
small occupying the apical part of the first three posterior cells and 
extending into the first and second submarginal in the region of the 
branching of the third vein; a hyaline streak in the second submarginal 
cell usually follows the posterior branch of the third vein toward the 
margin of the wing but does not reach this margin. 
Female: Frontal callosity yellow; first basal cell-of wing brown, 
second slightly infuscated at base, otherwise hyaline, cross band very 
nearly attains the posterior margin; the fourth posterior cell except 
narrow apex, fifth posterior except at base and narrow apex and anal at. 
apex brown, abdomen dorsally with four longitudinal black stripes; 
the two inner are pale on the first segment and the two outer on the 
first and second segments; ventrally yellow, darkened at apex, and 
on either side with two narrow dark lines abbreviated before. 
Male: Like the female except the second basal cell of the wing 
has only the apical third hyaline. 
Habitat: Found in all sections of Ohio. 
This species is not likely to be confused with others of our 
fuana except striatus, and from this it may be distinguished by 
the yellow thoracic stripes, and yellow scutellum in both sexes. 
