26 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.60. 



DILOPHUS OCCIPITALIS CoqnUIett. 



Dilophiis occipitalis CoQurLLErr (D. W.), In Baker, C. F., Reports on Cali- 

 fornian and Nevadan Diptera, I, Invertebrata Pacifica, vol. 1, p. 20, 

 February 10, 1904 [Claremont, Calif., type No. 7669, U.S.N.M.]. 



This probably is a synonym of D. hreviceps Loew. The female 

 type supports this belief, but associated sexes from the type locality 

 should be examined before a definite statement is made on this 

 synonymy. 



DILOPHUS PUSILLUS Wiederasnn. 



Dilophus pusUlus Wiedemann (C. R. W.), Ausz. zweifl. Ins., vol. 1, 1828, p. 

 77. [United States?]. 



DILOPHUS SERRATICOLLIS Walker. 



Dilophus serraticoUis Walker (Francis), List Dipt. British Mus., pt. 1, 

 1848, p. 117 [St. Martin Falls, Albany River, Hudson Bay]. 



This species has been identified by subsequent authors from New 

 York, Colorado, and Alaska, but on color characters only. 



