C. sulcicollis is the smallest, and least common member of the Cafius genus found on our sandy beaches, with a size range under 7.0mm. Their appearance is black with a reddish tint, noticeable under direct and sun light. They are only found on rare occasion but are more common farther north along the central coast. C. sulcicollis, like most sandy beach arthropods, can be found most commonly during spring to fall months, when temperatures are warmer. They consume fly larvae and small arthropods, including small free-living mites. This beetle is not likely to play a crucial role in the sandy beach ecosystem unless a large emergence occurs (very rare).