34 OHIO STATK 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 11. 



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 callidiis. 



' 12. The hyaline triangle of the wing produced beyond the second 



longitudinal vein toward the costa 13. 



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 15. 



15. Abdomen with a middorsal yellow stripe 17. 

 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 BRUNiSTEUS n. Sp. 



Length 8-10 mm. Antennae noticeably longer and the first two seg- 

 ments thicker than in flavidiis ; 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 distal 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 very 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. 



