there Juh^ 22. 1898. for the first time in the state. 



11. Eristnlis seneus. Scopoh. This species is 

 named from its color. It is the only Ohio species of 

 the genus with the body naked and unicolorous. It is 

 not a common species in the state, so far as I have 

 observed. 



12. Eristalis alhiceps. Macquart. This species 

 has only been taken in southern ' )hio. It resembles 

 E. transversus, but its abilominal markings are 

 different. 



lo. Eristalis hastardi, Macquart. The thorax of 

 this species is clothed with short, dense, yellowish pile, 

 and the wings have a dark pecture near the middle. 

 It appears to he common especially in the northern 

 })art of the state. 



14. Eristalis hrousi, Williston. This and number 

 13. I found tiymg together June 2:5, '!)S. along the edge 

 of the water <>f Silver Lake near Akron. They 

 would fiy so rapidly that the eye could hardly follow 

 them, and then come to ve^t suddenly on the sand, or 

 on the stones which were lying on the beach. 



15. Eristalis dimidiatus. Wiedeman. A common 

 species throughout the State. I took it to Georges- 

 ville, March 2(), "08, visiting the blossoms of our 

 common willow\ It is nearly naked and the abdomen 

 is shining black marked yellowish. 



16. Eristalis transversus. Wiedeman. The most 

 common species of the genus, in the state. It is 

 abundant in autum around the flowers of such com- 

 posite plants as grow on the margins of swamps. 

 While on the wing, it flies very rapidly and the noise 

 from the vibration of its wings is plainly audible. 

 The larvae of this and many of the other species of the 

 genus live in the mud and subsist on Vegetable food. 

 They are what are known as rat-tailed larvge. so 

 named because they are furnished with a tail or 

 breathing organ at the caudal end of the body. This 



