Q: deleting pics from iphone

Hello glowlowe,

Thanks for using Apple Support Communities.

I see you want to remove photos on your iPhone that you've synced from iTunes on your Mac.  For help with this process please follow the steps below:

Delete synced photos

1. In iTunes, locate and click on your device.
2. Click Photos.
3. Choose "Selected albums" and deselect the albums or collections you want to delete.
   To delete all synced photos, deselect "Sync Photos from" and, when asked, click "Remove photos."
4. Click Apply.

Learn how to delete photos and video synced from iTunes when you can't access the originals.

Sync photos from your computer to your iOS device using iTunes

If you have other photos that you've taken on your iPhone that you'd like to delete, I first suggest that you make sure they're imported into Photos on your Mac.

Photos for OS X: Import photos from a camera or mobile device

If you confirmed that your photos have been imported, and you are not using iCloud Photo Library, then you can delete the photos from your iPhone:

Delete photos or videos from Camera Roll

Before deleting photos or videos from the Camera Roll on your iOS device, you can import them to your computer. For instructions, see the Apple Support article Import photos and videos from your iPhone, iPad, or iPod touch to your Mac or Windows PC. 

1. In the Photos app, tap Albums, then tap Camera Roll.

2. Tap Select, tap one or more photos or videos, then tap . 

3. Tap Delete [items].

iCloud: Delete photos and videos to save storage

Take care.