PLATE 1.12. QUEEN HEAD POSTERIOR VIEW

BOTTOM Proboscis and other mouthparts posterior view of the head. The mouthparts are extended forward. Most structures in the other micrographs of this plate are visible in this field. The arrow points to the maxillary palp. ( x 40)

TOP RIGHT Head, posterior view. The large opening (lop) is the foramen magnum, to which is attached the cervix (or neck, through which pass the nerve cord, aorta, and esophagus as they span the head to the thorax). The opposing crescent-shaped apertures flanking the basal part of the foramen are the posterior tentorial pits. At the base of the foramen is the triangular postmentum, which is situated atop the bilobed prementum. Embracing the latter are the stipes and galea. Here the mouthparts are retracted beneath the head. (x 37)

TOP LEFT Higher magnification of the postmentum region. Flanking each side of the postmentum is the cardo. ( x 112)

BOTTOM LEFT Maxillary palp. This largely unadorned structure is without obvious cuticular sensilla. Possibly the "blebs" are campaniform sensilla. ( x 564)