Biological Papers. 95 



Palloptera superba Loew. 



A rare species. One of the two specimens I have was taken in the 

 timber on a small creek July 7, and the other in the heavy timber on 

 a larger stream July 5. 

 Sapromyza crevecoeuri Coq. 



Taken on hazel bushes from the last of June till early in August. 

 Sapromyza lupulina Fabr. 



Taken on weeds in the timber from the last of May till the middle of 

 June. 

 Sapromyza philadelphica Macq. 



Taken on prairie, and on weeds at the edge of timber, during the latter 

 half of June. 

 Sapromyza vulgaris Fitch. 



Swept on the prairie May 30. 



Family Ortalid^. 

 Pyrgota valida Harris. 



I have taken this species a number of times in my cloth traps in the trees 

 in the dooryard the latter part of April. 

 Amphicnephes fasciola Coq. 



The types of this species were collected by myself. It is a common spe- 

 cies, and is found by beating the vegetation growing in pastures from 

 June until September. 

 Tritoxa incurva Loew. 



One of the uniques determined by Professor Kahl, and my remarks on 

 Mixogaster breviventris (supra) also apply to this species. 

 Pterocalla strigula Loew. 



A rare species, and the only specimen I have was taken by sweeping in 

 heavy timber May 18, 1898. 

 Euxesta notata Wied. 



Taken on carrion April 24, and in sweepings in heavy timber May 18. 



Family Trypetid^. 

 Straussia longipennis Wied. 



This species has been listed by Doctor Snow. I have specimens which 

 Professor Hine determines as this species but which I think is a dif- 

 ferent species, as it is quite different from the form usually known by 

 this name. The wings of my species are narrower than common S. 

 longipennis, and the markings in the wings form a dark band occupy- 

 ing about two-thirds of the costal border of the wing. I feel satisfied 

 that when the species comes to be more thoroughly studied it will be 

 found to be distinct from longipennis. 

 Eutreta rotundipennis Loew. 



On weeds in heavy timber the middle of June. 

 Eurosta comma Wied. 



Taken in fair numbers in a pasture early in October. 

 Eurosta reticulata Snow. 



A rather scarce species. Taken on the prairie May 25, 1900. 



