THE CANADIAN ENTOMOLOGIST. 181 



Family cecidomyid.ï. 



Lestremia leucophœa Meig. — Dallas, July. Two specimens. 



Bred from droppings one day (Id in pasture. 



*Diplosis sp. — Victoria, June 9. One specimen. 



Cecidomyia sp. — Victoria, June 9. Dallas, May to December. 

 Seventeen specimens. 



The salmon-coloured larvœ are very conspicuous. Tiie species 

 apparently is perfectly at home in the manure. 



Family bibionid.e. 

 Scatopse atrata Say.— Dallas, July 26, Sept. iS. Nineteen specimens. 

 This species was bred from fresh manure. The flies follow the cattle 

 into the stables. 



Family empidid/e. 

 Tachydromia pusilla Loew. — Dallas, June 22. One specimen. 



Family sarcophagid/e. 



*Sarcophaga ( Helicobia) quadrisetosa Coq. — Dallas, July 26, 29, 30, 

 Sept. 10, 16, 18, 23, Oct. 8. Victoria, June 15, July 4, 23, Nov. 2, 24. 

 One hundred and forty-two specimens. 



This species is one of the most common in cow manure. From one 

 dropping 78 specimens were bred. The developmental period varied 

 from 7 to 14 days. The flies frequently invade the stables, and are often 

 seen on the manure immediately after it is voided. 



Sarcop/iaga incerta Wills. — Dallas, Aug. i, 16, Sept. 3, 10, 12, 22, 

 Oct. 1 8, 2 1, 23. Fifty-nine specimens. 



This species is exceedingly common in the pastures, but is seldom 

 seen in the stables. It develops in from 14 to 18 days in the summer. 



Sarcophaga assidiia Wills. — Dallas, July 26, Aug. 3, Sept. 9, 12. 

 Thirty-eight specimens. 



This species has been bred from fresh manure in the milking-houses. 

 The developmental period in August ranged from 17 to 20 days. 



Sarcophaga helicis Town?. — Victoria, Aug. 7. One specimen. 



On account of the published notes on the habits of this species it is 

 likely that the occurrence in cow manure was accidental. 



Sarcophaga varicauda Coq. — Dallas, July 30. Twenty-four specimens. 



This species is found in aind about the milking-houses more com- 

 monly than in the pastures. Development occupied from 10 to 14 days. 



Family ^lUSCiD.t:. 

 Pseudopyrellia corniciiia Fabr. — Dallas, July 29, Aug. 19, Sept. 10, 

 17, 22, Oct. 2 1, 23, 24, 26, One hundred and thirty-two specimens. 



