THE SYRPHIDAE OF OHIO 95 



II Fourth abdominal segment brilliant bronze; third longitudinal vein gently 



curved; arista wholly luteous analis 



Fourth abdominal segment black; third vein quite straight; arista whollv 

 black ejuncida 



8.5 X. analis Williston. One male, Sandusky; July 7. 



86 X. anthreas ? Walker. One male, Columbus, May 10, seems to fit 

 very closely Williston' s description for the female except that the pile of 

 the thoracic dorsum is erect, not appressed. 



87 X. angustiventrls Loew. Three males, Hinckley, lyondon; late 

 May to early August. « 



88 X. chalybea Wiedemann. Four luales, Medina, Columbus, Cin- 

 cinnati; mid- May to early Augtist. 



89 X. ejuncida Say. Abundant, Ira, Hinckley, Columbus, Cincin- 

 nati; mid-May to mid- Augtist. Majority of specimens males. 



X. elongata Williston. Considered a synonym of angustivcntn's 

 (Aldrich). Three females, Hinckley, Waterloo, Ashtabula; early June 

 to early August. 



90 X. fraudulosa Loew. Six males, three females, Cincinnati, 

 Coltirabus, Lockbotirne, vSandusky; early May to mid-Jul}'. 



91 X. marginalis Williston. One female, Cincinnati, May 3. 



92 X. pigra Fabricius. Taken by Dur\' at Cincinnati, May 14, 

 1906, and June 26, 1904. 



Chrysochlamys Rondani 



1 Hind border of the second and third abdominal segments black, opaque; 



arista reddish 2 



2 Face in the middle with a V-shaped black spot; legs reddish-yellow dives 



Facial spot indistinct in outline; front femora at the base and the tip of all the 



tarsi black *buccata Loew, female ( Va. ) 



93 C. dives Osten Sacken. Two females, Medina, Sandusky; late 

 June, early July. 



Brachypalpus Macquart 



1 Hind femora with short bristles below; abdomen with brilliant metallic cross- 



bands {CaUiprobola) : dorsum of thorax yellow pilose, 



*sorosis Willst. (Ga., N. J. ) 



Hind femora not with bristles below; abdomen uniformly black 2 



2 Legs wholly black: abdomen uniform black rileyi 



Lfg-! in part yellow; hind femora toward the end, the hind tibiae before tlie 



middle and at the lower end, spurred in the male; length 10 mm. or ninre 

 frontosus 



