Red-shouldered bugs (mating pair)

J. haematoloma are typically 9.5–13.5 millimeters (0.37–0.53 in) long and 3–4 millimeters (0.12–0.16 in) wide, though the short-winged form (brachyptera) usually is 7–8 millimeters (0.28–0.31 in) long. Color is mostly blackish (sometimes dark gray or purplish) except for red eyes, "shoulders" (lateral margins of pronotum), and costal margins and dorsal part of abdomen. Nymphs are mostly red with a black pronotum and wingpads. All appendages are blackish. (information from Wikipedia)