Biological Papers. 93 



Hybos triplex Walk. 



Taken in sweepings on the prairie May 26, 1897. 

 Hilara femorata Loew. 



The one specimen I have of this species was taken May 12, 1901. My 

 notes do not say in what situation, but I think I recollect taking it on 

 the window of our residence. 

 Rhamphomyia fumosa Loew. 



Common on the weeds in the timber during May and June. 



Family Syrphid^. 

 Microdon fuscipennis Macq. 



A single specimen taken about fifteen years ago is all that I have ever 

 seen of this species. The specimen has no date or other labels, as I 

 put no labels on my specimens then. 

 Mixogaster breviventris Kahl. 



A number of uniques given to Professor Kahl while he was yet at the 

 Kansas State University contained a specimen which he determined 

 as this species, but as he retained the specimen, with its accompany- 

 ing note, I cannot tell when or in what situation it was taken. 

 Chrysotoxum derivatum Walk. 



An uncommon species. Have taken it frequenting flowers along a slough 

 the last week in June; also in heavy timber the last week in August. 

 Baccha fascipennis Wied. 



A few taken in heavy timber the middle of June. 

 Mallota posticata Fabr. 



I have met with this species but once; a half-dozen or so were sunning 

 themselves on the tops of Impatiens pallida on French creek June 12, 

 1904. 

 Xylota chalybea Wied. 



One of my uniques determined by Professor Kahl. I have a fly taken 

 since, which from memory I think is this species, which was taken May 

 12, 1901. 



Family Tachinid^. 

 Leskia analis Say. 



Taken on weeds in the timber the latter part of July. 

 Leucostoma senilis Town. 



On weeds and bushes in the timber the last week in June, and on the 

 blossoms of Solidago in the pasture the middle of September. 

 CEstrophasia ochracea Bigot. 



Taken on the prairie in September and October. I once found a specimen 

 in water put in a sorghum evaporator over night, 

 CEstrophasia signifera Van der Wilp. 



Taken the last of May. 

 Ocyptera Carolina Desv. 



Taken in beating net on the prairie the latter part of June, and on blos- 

 soms of Solidago, also on the prairie, early in September. 

 Acemyia tibialis Coq. 



Taken on the prairie June 22, and at light September 22. 



