86 OHIO BIOLOGICAL SURVEY 



5 Eyes pubescent torvus 



Eyes bare 6 



6 The cross-bands attenuated at their ends ribesii 



The cross-bands reach the sides in nearly their full width grossulariae 



7 The second and third abdominal cross-bands do not quite reach the lateral 



margin; cheeks black, face with a brown stripe americanus 



The second and third bands attain the lateral margin 8 



8 The second and third cross-bands not distinctly attenuated at their ends, the 



bands broad; face and cheeks wholly yellow, the thorax with a distinct 



yellow pilose and poUinose lateral band xanthostomus 



The second and third bands distinctly narrowed at their ends; thorax not with 

 distinct yellow lateral pollinose bands, face and cheeks 3'ellow 9 



9 Hind femora in the male entirely yellow; abdomen in the female broader, the 



bands narrower protritus 



Hind femora in the male black ribesii male 



10 Third vein of wings nearly straight; pile of pleurae white. Two rounded sep- 

 arated spots above the antennae . . perplexus Osburnf 



Third vein strongly curved; pile of pleurae yellowish; a single biarcuate black 

 band above the antennae. .*arcuahisV alien, (D. C, N. J., Col., Wash., Ariz., 

 Can. etc.) 



34 S. americanus Wiedemann. For descriptions of stages see 

 Part II, pp. 54-55. Ver}' abundant, middle of May to middle of Septem- 

 ber apparently all over the state. See note on variety? pp. 55-56. 



35 S. diversipes Macquart. One male, Cincinnati, April 20. 



36 S. grossulariae Meigen. One male, one female, Ira; late August, 

 early September. 



37 S. perplexus Osburn. Six specimens from Cincinnati. 



38 S. protritus Osten Sacken. One female, Wauseon, Sept. 10. Two 

 other females resemble this species clo-sel)^ but have the base of the 

 femora black. 



39 S. ribesii Linne. Numerous males and females, Columbus, Lake- 

 ville, Sandusky, Ira, Vinton, Medina; April to September inclusive. 



40 S. torvus Osten Sacken. For description of adult, larva, and 

 pupa see Part II, p. 56-57. Common Columbus, lyakeville, Ira, Vinton; 

 middle of April to middle of September. 



41 S. xanthostomus Williston. For complete description of adult, 

 larva and pupa see Part 11, ]). 57. Very common, Columbus, Sanduskj^ 

 Ira, Akron, Hinckley, Medina, Blendon, Lockbourne, Kent; mid- May to 

 mid-vSeptember. 



+.Iournal N. Y. Eiit. Soc. Vol. XVIII, Xo. 1. pp. 53-57, March, 1910. 



