Kissing bug, DO NOT let it bite you
I had one bite me years ago on my left forearm while working in SO CA Mojave Desert. I had removed my long sleeve shirt after climbing a power pole and laid it across a greasewood bush, the dang bug crawled up into my sleeve and bit me when I had put the shirt back on. That bite swole (SP?) way up from my wrist to me elbow and got badly infected, it was horrible It left a big scar after getting it treated and taking care of the infection
The X on its back is there for a reason