Coyote brush bud gall midge

Rhopalomyia californica

The galls caused by the coyote brush bud gall midge (Rhopalomyia californica Felt, 1908) often have leaves protruding from them.
Coyote brush bud gall midge  Baccharis pilularis,Coyote brush bud gall midge,Geotagged,Rhopalomyia californica,United States,gall,insect

Behavior

Adults emerge, mate, lay their eggs, and die, all within a 24-hour period (on warm days, as little as a 5- to 6-hour period).

Reproduction

The larvae are fully developed in 30-70 days after which they burrow out of the gall, develop their white cocoons and pupate. Galls develop and adult midges emerge throughout the year though with a noticeable burst of activity in the spring.

Predators

Over 10 species of parasitic Hymenoptera have been reared from R. californica in California, including Torymus koebelei.

References:

Some text fragments are auto parsed from Wikipedia.

https://montereywildflowers.com/Galls.php
http://bugguide.net/node/view/225834
http://ucce.ucdavis.edu/files/repositoryfiles/hilg5001p032-152837.pdf
Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassInsecta
OrderDiptera
FamilyCecidomyiidae
GenusRhopalomyia
SpeciesRhopalomyia californica