Subject: Small black beetles with jewel colors of blue and violet
Geographic location of the bug: Little Belt mountains Montana
Time: 11:48 AM EDT
Your letter to the bugman: I have seen these in the months of June and July on blooming mountain lupines in the Little Belt and the Castle Mountains. I would like to know what kind of beetle these are?
How you want your letter signed: David C Powers
The image of a solitary beetle on a blossom is definitely a Blister Beetle in the family Meloidae, but we are uncertain of the species. The other image showing an aggregation of Beetles appears to be a different species. Can you clarify any information on these two images, especially the group of beetles. Were they found aggregating as the image depicts? Here is a BugGuide image of Linsleya sphaericollis that resembles the Blister Beetle in your image of a solitary individual, but again, we cannot verify the species.
Your newly submitted images appear to be the same beetles that were in your original aggregation image, and we believe they are Leaf Beetles, possibly Flea Beetles from the genus Altica like the ones in this BugGuide image.