DIPTERA. 247 



19. Chironomus moltitatrix, Linn. Not common.. 



20. C. tremulus, Linu. Abundant, May. 



21. C. stercocarius, DeGeer. Winter Gnat. Abun- 



dant throughout the winter. I have seen it, 

 when the ground is covered with snow, flying in 

 swarms in company with Trichocera hyemalis, 

 or winter Daddy-long-legs. 



22. C. aterrimus, Meig. Abundant. 



23. C. olivaceus, Meig. Abundant. 



24. C. terminalis, Meig. Common. 



25. C. nitidus, Meig. Not common. 



26. C. festivus, Meig. Not common. 



27. C. dolens, Walk. Not common. 



28. C. carbonarius, Meig. Common. 



29. C. obscuripes, Meig. Abundant, April and May. 



30. C. minimus, Meig. Abundant throughout the winter. 



1. Tanypus varius, Fab. Abundant. 



2. T. punctipennis, Meig. Common. 



3. T. zonatus, Fab. Abundant. 



4. T. culiciformis, Linn. Common. 



5. T. monilis, Linn. Abundant. 



6. T. melanops, Meig. Common. 



7. T. palliclulus, Meig. Common. 



8. T. prsecox, Meig. Abundant. 



9. T. hortensis, Meig. Common. 

 10. T. palustris, Lat. Common. 



1. Ceratopogon illustris, Wtz. Beautiful Midge. 

 Eare. Taken by my father in the Quag, on 

 July 12th, 1845, and July 10th, 1868. 



