You are here:

Entomology (Study of Bugs)/Malachius aeneus larvae


Malachius aeneus larvae
Malachius aeneus larva  
Dear Mr. Saugstad

I'm writing you from Slovenia, Europe. On internet I found some answers that you wrote about bugs,. I'm wondering if you can help me with any advice. Here is the problem:
My family lives in house that was built in 1964. Two years ago we partly renew it and made some adaptation. Than in last February we noticed new visitors on walls in our rooms and bathroom. After "internet investigation" we concluded that this visitors are Malachius aeneus larvae (please see attachment). We can't find out from where they are coming from. We never saw Bugs, but only larvae. Now larvae starts coming out from somewhere again.
Could you please help us with advice how to get rid of these larvae, because our daughter is 1year old and it is not so nice to get contact with them.

With kind regards,

Dear Mojca - Your image does appear to be that of a larva of a scarlet malachite beetle, Malachius aeneus (Coleoptera: Melyridae); see for an image of an adult beetle. This species has a very wide range in Europe and occurs in much of northern North America as well. You needn't worry about control as these insects are completely harmless to humans. The larvae appear to be general predators on other small arthropods, while the adult beetles are reported as feeding primarily on pollen as well as occasionally on other small flower-visiting insects.
Hope this helps,

Entomology (Study of Bugs)

All Answers

Answers by Expert:

Ask Experts


Ed Saugstad


Will accept most questions in general entomology, including those related to medical entomology, taxonomy, ecology, arthropod surveillance, and pest management. If you are requesting a 'mystery bug' identification, PLEASE either attach an image to your question, or post an image on a web page (such as Flickr) so that I can look at it, as verbal descriptions frequently are insufficient for a definitive identification.


21 years in the U.S. Army as a medical entomologist; duties varied from surveillance of pest populations (including mosquitoes, cockroaches, ticks, and stored products pests) to conducting research on mosquito-virus ecological relationships and mosquito faunal studies. Ten years as a civilian analyst for the Department of Defense, primarily on distribution of vector-borne diseases worldwide. Limited experience on surveillance of agricultural insects in North Dakota and Indiana.

Entomological Society of America, West Virginia Entomological Society, Society for Vector Ecology, National Speleological Society, West Virginia Association for Cave Studies.

American Journal of Public Health, Contributions of the American Entomological Institute, Japanese Journal of Sanitary Zoology, Journal of Economic Entomology, Mosquito News, and Mosquito Systematics.

B.S. in entomology from North Dakota State University in 1963, M.S. in entomology from Purdue University in 1967.

©2017 All rights reserved.