314 MICHIGAN SURVEY, 1908. 



diatits is found all over eastern North America from Florida to Canada 

 and west to Kansas. 



32. Eristalis hasfardii Macquart. Specimens taken August 4 (V, 3). 

 I have observed this species at midday when the sun was shining, flying 

 actively over water and have taken them in numbers at such times with 

 a net. It is common over the greater part of northeastern North Amer- 

 ica, being found as far south as the District of Columbia. 



33. Belophihix siwilis Loew. Specimens taken July 26 and 28 at 

 Light-house clearing (I, 7). The members of this genus are peculiar 

 in that the eyes are separated in the male as well as the female. This 

 species is often taken in early spring from the blossoms of willow and 

 other early flowering plants. The type locality is Georgia but it appears 

 to be more common northward Avhere its range extends from the Atlantic 

 to the Pacific. 



34. 3Iallota cimhiciforniis Fallen. Specimens taken July 23 and 26 

 at Light-house clearing (I, 7). Common to Europe and North America 

 and widely distributed over the eastern part of the latter country. The 

 species has a resemblance to certain species of Eristalis, but the greatly 

 thickened hind femora are distinctive. 



3.5. Xylota curvipcs Loew. One specimen taken July 26, at Light- 

 house clearing (I, 7). The genus Xylota contains upwards of 40 North 

 American species which in the main are reasonably easy to separate, 

 and for that reason it is an attractive group. Various species are often 

 observed resting on logs in damp places or that lie across small streams. 

 In many the abdomen is distinctly elongated and the hind femora are 

 swollen. X. curvlpes is common to Europe and North America, being 

 most often taken in northern latitudes. 



36. Xylota fraiidulosa Loew. One specimen taken August 12 (V, 3). 

 Type locality Illinois, but known in northern North America from New 

 England to Washington reaching south to Ohio and Nebraska. 



37. Xylota pigra Fabr. One specimen taken July 22 at Light-house 

 clearing (I, 7). Common to Europe and North America and generally 

 distributed over the United States and Canada. The adult has been 

 reared from a larva taken from under the bark of a pine tree. 



38. Temnostoma aequalis Loew. Specimens taken July 17, 22, 23, 24, 

 26 at Light-house clearing (I, 7) and July 25 (II, 1). This fly has some- 

 what the appearance of the common bald-faced hornet and one usually 

 thinks the second time before taking it in his hand. In Ohio various 

 species of the genus are to be found around rotten logs where the females 

 oviposit and the larvae pass their lives as such. Type locality, English 

 Eiver, Hudson Bay Eegion. Otherwise known from New England and 

 Colorado. The Isle Eoyale specimens vary slightly in abdominal and 

 thoracic markings but on the whole agree very well with the original 

 description. 



39. Temnostoma homhylans Fabr. One specimen taken July 17, at 

 Light-house clearing (I, 7). Common to Europe and North America and 

 widely distributed in the latter country, having been taken as far south 

 as southern Ohio. 



Family TacJiiiiidae. 



40. Peletcria robnsta Wiedemann. One specimen taken July 26 at 

 Light-house clearing (I, 7). This species is reported as occuring from 



