"Northern Front" should be placed somewhere around Baltics, not amidst the Arctic Ocean.
Is that a Tatar regionalist party I see there - the bit of light green in a sea of orangey-brown?
Yes, although I can't give more details. I got the results from a document which is entirely in Russian, so I had a hard time deciphering the party labels. Karelia also seems odd, and I can't vouch for the accuracy of the results there on the map; another source I saw put the SRs victorious there.
In sources I know those who won in green regions are labelled as "Socialists", and I can only guess what exact socialists are meant, but judging by their geography and some other things it seems they indeed were Ukrainian SRs and other regional/ethnic socialists.
Besides Tatars, there were also Chuvash and maybe Mari lists in Kazan Governorate.
In Olonets Governorate (Karelia) 84.63% votes were obtained by "Socialists" and another 13.50% by Kadets. In that case "Socialists" probably means all socialist parties combined, including SRs, Bolsheviks and Mensheviks.