Mola or Molar: the ridged or roughened grinding surface of the mandible: when the mandible is compound, the molar corresponds to the subgalea of maxilla. Monarsenous: that kind of union where one male suffices for many females. Moniliform: beaded like a necklace. Monochromatic: of one color throughout. Monodactyle: with a single movable claw which closes on the tip of the other leg structures as in some parasitica. Monodomous: ants in which each colony has one nest only. Monoecious: when both sexual elements or glands exist in one individual. Monogamous: a union where a female is fertilized by one male only. Monomeri: insects with one-jointed tarsi. Monomorphic: species of which only one sex (female) is known to exist. Monophagous: insects feeding upon only one species or genus of plants. Monothelious: a union where one female is fecundated by many males. Monotrocha -ous: Hymenoptera in which the trochanters are single: having legs in which the trochanter is one-jointed. Monotypical: a genus described from a single species, no other being known; or described from a single specified species with which are associated others believed to be identical in structure: see isotypical and heterotypical. Moult: a period in the transformation when the larva changes from one instar to another: the cast skin of a larva that has moulted. Mouth: the anterior opening into the alimentary canal, where the feeding structures are situated and in which the food is prepared for ingestion. Mouth-parts: a collective name including labrum, mandibles, maxillae, labium and appendages = trophi. Mucoreus: mouldy: a surface covered with small, fringe-like processes. Mucro: a long, straight or curved process terminating in a point: the pro-sternal process in Elateridae: the terminal spine or process of an obtect pupa: "the median posterior point of the epigastrium when differentiated by elevation." Mucronate: terminated in a sharp point. Mucrones: in Collembola the two small end pieces of the furcula, proceeding from the dentes. Mullerian association: a group of species belonging to different genera, often different families or even orders, having similar colors, possessing more or less distasteful qualities and living in the same locality. Muller's thread: the common terminal thread of all the ovarian tubes. Multangulate: with many angles. Multi-: many; used as a prefix, often without the i. Multiarticulate: with many joints or segments. Multilocular: with many large cells, spaces or cavities. Multipartite: divided into many parts. Multiplicate: with many longitudinal folds or lines of plication. Multispinose: with many spines. Mumia: the pupa. Munite -us: armed; provided with an armature. Muricate -us: armed with sharp, rigid points. Murinus: mouse colored [gray with some yellow]. Mushroom bodies: two stalked, mushroom-like bodies arising from procerebral lobes; supposed to be the seat of insect intelligence.