Entomology of the Illinois Rioer. 233 



T. relnwardtii Wied. 

 One example, Urbana, July. 



T. cerastes O.-S. 

 A single specimen in our collection; Illinois. 



Subgenus Tabanus. 

 T. cymatophoms O.-S. 



From near the Mississippi at the southern border of 

 Jackson county in southern Illinois, Aug. 8 and 26; mod- 

 erately common. See also remarks under T. abdominalis. 



T. venustits O.-S. 



Mot rare about Urbana; taken in June and up to July 

 20; also Aug. 16, on flowers. 



T. turbidAis Wied. 



A specimen from IlHnois doubtfully referred to this 

 species [Osten-Sacken, "Prodrome"]. 



T. abdominalis Fabr. 



While in Grand Tower, on the Mississippi, near the 

 southern boundary of Jackson county, I secured Aug- 

 ust 26 a quantity of Tabani in really good condition 

 from the boys who were tending cattle. Every specimen 

 brought in was a female. The list is as follows: 



T. cymatophorus^ 5 examples. 



T. abdominalis^ 56 " 



T. exul, 3 " 



T. giganteus, 29 *' 

 The fifty-six examples of the present species varied ex- 

 tensively in quality of abdominal color, but all had a 

 narrow front and a closed first posterior cell. Females 

 have also been collected by us at Grand Tower Aug. 8. 



T. exul O.-S. 



In addition to the three examples mentioned in the 

 preceding list, we have three females and a male (the lat- 

 ter as described by Osten-Sacken) from Urbana and the 

 Mississippi bottoms of Union county, Aug. 3-Sept. 6. 



