They are a species of thrips. I use a two step process.
Azamax is an ultra refined neem oil....so either is fine. I added neem oil to my watering every other watering for about 10 days. On the same days that I watered with neem, I carefully washed the leaves with a homemade insecticidal soap (water, Dr. Bronner's soap, clove oil, rosemary oil). I didn't see any more after the first treatment, but I find it is always a better idea to treat two or three times instead of allowing stragglers a chance to repopulate.
The soap helps the oils stick and both clove oil and rosemary oil are known to kill thrips. A multi product approach is always a better idea than using stronger and stronger chemicals. Pyrethrum and Spinosad are unnecessarily strong chemicals for this bug.