Those don't look like brown recluse bites (i've had 3). However, i do think those are boils...they can be caused by a bacterial infection or insect bites (maybe it's a different insect- but the location and the fact that there's two makes me think it's boils just from a bacterial infection - sweating, chaffing,/etc can cause them) You need to go to a doctor or minal medical clinic however because that is only my opinion and i can not give you a diagnosis
As far as boils go- they can be very painful (so can spider bites) just to warn you. You need to start putting hot compresses on them on for 20 minutes off for 15 all day or at least as often as you can. A warm soak in the bath tub is good to- wash with antibacterial soap. I would suggest heating up hot water then dipping a wash rag in there/draining it then putting it on you as a hot compress. It will help it come to a head so that it can be poped and drained. Sometimes they will drain on their own - but many times they need to be forced when they're ready or lanced by a medical professional. (it will be ready to pop when you see a white head surface like you would a pimple.) it can be painful when it gets ready to be drained, but once you drain it - the relief is instant!
IT might take a day or so to completly drain it so you will need to continute with hot compresses.....also when it starts to drain- put neosporin on it when it opens up to help reduce infection (right now it won't be absorbed so there's no point but when it opens up you will need to.) When it drains that's a sign it is healing because it is pushing that infection out. So that's good. Also- you need to take a sharpie (preferably black) and draw a circle around the area- this way you can tell if it's expanding or getting worse- be very careful- at any signs of changes you need to get to the doctor. They may want to put you on a prescription for Z-pac or some similar antibiotic to reduce infection odds.