Last summer was the first time I experienced a true Southern Arizona monsoon. The rains brought out all sorts of Tenebs I've never seen alive. The plants were green, flowers were blooming, and love was in the air. All sorts of bugs that I had never seen alive were out including bunches of Asidines (the non smelly desert tanks). Below is a photo of a normal mating pair of Philolithus morbillosus.
This pair was one of hundreds of this species that had aggregated in a grassy parking lot. Apparently the males are quite depraved as the next photo illustrates.
The male (on top), in a hurry to copulate, did not realize that the female (who was frantically trying to run away) was of a completely different species. The bottom species is Parasida lirata. This male was not alone, a number of other odd couplings like this were observed, and some were succeeding in copulating. Would have been quite interesting to see if any viable young were produced but alas I didn't keep any... Perhaps this coming monsoon I'll grab some.