34 OHIO STATE ACADEMY OF SCIENCE. 
10. Apical-spot not wider than the distance between the costa 
and second vein at the outer border of the cross—band ite 
Apical-spot wider than the distance between the costa and the 
second vein at the outer border of the cross—band 12. 
11. The yellow on each side of the second segment encroached 
upon from behind by a black triangle; the yellow spot is 
very small moerens. 
The yellow on each side of the second segment not encroached 
upon by a black triangle, or if so the triangle is very 
small callidus. 
12. The hyaline triangle of the wing produced beyond the second 
longitudinal vein toward the costa tiles 
The hyaline triangle not produced beyond the second longi- 
tudinal vein 14. 
13. The cross—band of the wing reaches the posterior margin fallax. 
The cross—band of the wing does not quite reach the posterior 
margin hilaris. 
14. Abdomen with a middorsal row of large black spots widest 
before; facial callosities shining black frigidus. 
Abdomen with a middorsal row of small gray or yellow 
triangles ta: 
15. Abdomen with a middorsal yellow stripe Me 
Abdomen with a yellow stripe on either side of the black 
which contains the middorsal row of small triangles montanus. 
Abdomen yellow on the sides of the first four segments but 
with no suggestion of stripes 16. 
16. The cross-band occupies only the apex of the second sub-— 
marginal cell sackeni. 
The cross—band occupies the anterior half of the second sub- 
marginal cell indus. 
17. Scutellum yellow vittatus. 
Scutellum black 18. 
18. Four black stripes on the dorsum of the first two abdominal 
segments; the inner of these may be united striatus. 
Two black stripes on the dorsum of the first two abdominal 
segments univittatus. 
CHRYSOPS BRUNNEUS fl. Sp. 
Length 8-10 mm. Antennae noticeably longer and. the first two seg— 
ments thicker than in flavidus; first and second segments brown, third 
yellow at.the base with apical half black; thorax with four grayish 
longitudinal stripes separated by brown intervals, the apical spot spreads 
over a large part of the apex of the wing fading out so gradually that 
the real extent of .it is not clearly defined; a narrow whitish hyaline 
band is conspicuous along the distali:margin of the cross band and occupies 
part of each of the first submarginal and first, second and third posterior 
cells;.the cross—band fills: out the fourth posterior cell and invades the 
fifth posterior ;:the margin of the posterior branch of the fifth vein spreads 
across the apex at the anal cell and communicates: somewhat with the 
cross—band; the :first basal cell is infuscated for two-thirds,:and the 
second for about half the length. 
The abdomen ‘is clear brown often with tee small yellowish tri- 
angles in the middle of the posterior part of segments two to five. 
The male and female are alike, differing only in sexual characters. 
