Wani is the largest, above brown, below slaty-grey; the head grey, with a black zone across the sinciput.
sinciput: in Coleoptera; that part of the vertex between the eyes.
See these peculiarities in the frontal sinus—in sinciput or occiput!
sinciput, sin′si-put, n. the forepart of the head from the forehead to the vertex.
sinciput sin·ci·put (sĭn'sə-pət)
n. pl. sin·ci·puts or sin·cip·i·ta (sĭn-sĭp'ĭ-tə)
The upper half of the cranium, especially the anterior portion above and including the forehead.