These bugs were numerous running nymphs upon the dry sandy soil . There were many different sizes and stages of these fellows . The one I have in the photo is mature since it has working wings . I found a cluster of eggs that hatched on a prickly tumbleweed bush and all the babies were black with the striped sides . They were only 1/8 " long . I found many green Stink bugs on this type of weed , but really nothing else . I am guessing they came from the green prickly tumbleweed bushes because of the clusters of eggs found on them and the striped resemblance , unless the green stinkbug has nymphs that are dark with rim stripes ?? Anyhow , I am pretty sure this is some kind of Assasin bug , but cannot match it to any in my books or on the GUIDE . Thanks for any comments , I am truly hoping that this is not the dreaded blood sucking Cone nose bug . Sincerely Beth