31. The front eight segments have spiracles and the terminal segment is modified for reproduction. 32. The main difference is that the Notostigmomorpha have their spiracles located mid-dorsally. 33. The trachea open through spiracles into this air film, allowing access to oxygen. 34. Spiracles are located on the abdomen and are the tracheal system of the beetle.35. The abdomen has ten segments, each with a pair of spiracles for respiration. 36. They have been observed producing hisses and whistles from air forced through the spiracles . 37. The eyes lack nictitating membranes; the tiny spiracles are located well behind them. 38. The anterior spiracle and anterior angle of antennal bases is prominent ( most ). 39. The spiracles are oval, shiny and white. 40. Its spiracle is just above the area where the pectoral fin meets the body.
