THE DIPTERA OF CLYDE. 



19 



*Platychirus tarsalis, Schum, - 



Melanostoma seal are, F., - 



* Melangyna quadrimaculata,V err 



*"* Ischyrosyrphus glaucius, L., - 



I. laternarius, Mull., 



** Syrphus albostriatus, Flu., 



**S. tricinctus, Fin., 

 **S. venustus, Mg., - 

 **«S r . lunulatus, Mg., 

 S. annulatus, Ztt., 

 **S. lineola, Ztt., 

 **#. vittiger, Ztt., 

 S. latifasciatus, Mcq., 

 S. luniger, Mg., 

 **S. bifasciatus, F., - 



S. cinctellus, Ztt., 

 S. einctus, Fin., 



**#. auricollis, Mg. — 



var. maculicomis, Ztt., - 

 S. punctulatus, Verr., 



**S. guttatus, Fin., - 



S. compositarum, Verr., 

 *S. lasiophthalrmis, Ztt., - 

 S. arcticus, Ztt., 



Sphegina clunipes, Fin., 

 ,-lscirt podagrica, F., 



**IIelophilus trivittatus, F., 



//. Jiybridus, Lw., 

 *./?. trans fugus, L., - 



April — May. Bonhill (teste Mr. 

 P. H. Grimshaw). 



May — Sept. Gen. dist. 



, April. Bonhill. 



August. Clober Dam. 



Sept. Bonhill. 



June — July. Hawkhead; Ben- 

 more Est. 



May. Cadder 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.). 



Mav. Hawkhead Est. ; South 

 Bar ; Cadder 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 $ , 12th July, 1905. Holy 

 Loch. 



August. Bonhill. 



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

 field Loch. 



