THE DIPTERA OF CLYDE. 



19 



*Platychirus tar salts, Schum, - 



Melanoritoma scalare, F., - 

 * Melangyna qitadriinaculata,Yevr. 

 ** Ischyrosyl'phus glaucius, L., - 

 /. laternarius, Miill., 

 **Syrphus albostriatus, Fin., 



**S. tricinctus, Fin., 



**S. venustus, Mg., - 



**S. lunulatus, Mg., 



S. annulatus, Ztt., - - - 



**S. lineola, Ztt, - 



**S. vittiger, Ztt., - 



S. latifasciatus, Mcq., 



S. luniger, Mg., 



**S. bifasciatus, F., - 



S. cinctellus, Ztt., 

 S. ductus. Fin., 



**S. auricoUis, Mg. — 



var. maculicornis, Ztt., - 

 S. punctulatus, Verr., 



**S. guttatus, Fin., - 



S. compositarum, Verr., 



*S. lasiophthalmus, Ztt., - 

 S. arcticus, Ztt., 



Sjjhegina clunipes, Fin., - 

 Ascia podagrica, F., - 



**Helophilus trivittatus, F., 



H. hybridiis, Lw., 

 *H. transfugus, L., - 



April — May. Bonhill {teste Mr. 

 P. H. Grimshaw). 



Maj' — Sept. Gen. dist. 



, April. Bonhill. 



August. Clober Dam. 



Sept. Bonhill. 



June — July. Hawkhead; Ben- 

 more Est. 



May. Gadder Wild. 



June. Erskine. 



June — Sept. Bonhill. 



June. Bonhill. 



May. Bonhill. 



June. Bonhill. 



August. Helensburgh M. 



May — Sept. Gen. dist. 



May — Aug. Hawkhead Est. ; 

 Clober Dam ; Holy L. 



May. Gorge of Avon. 



June — July. Gorge of Avon ; 

 Bonhill. 



Sept. Helensburgh (B.H.). 



May. Hawkhead Est. ; South 

 Bar ; Gadder Wild. 



June — July. Strone ; com. in 

 garden at Bonhill. 



Aug. — Sept. Bonhill. 



April. Murroch Glen. 



May — August. Cadd. Wild. ; 

 Erskine ; Bonhill. 



July. Puck's Glen. 



June. Castlemilk ; Frankfield 

 Loch. 



One ? , 1 2th July, 1 905. Holy 

 Loch. 



August. Bonhill. 



One ? , 1 9th June, 1 904. Frank- 

 field Loch. 



