MORSE: ORTHOPTERA OF NEW ENGLAND. 543 
Lower margin: sometimes applied to the anterior or costal margin of the 
tegmina in Orthoptera, in which it is ventral in the resting position. 
Luteous: yellowish; the color of honey; clay yellow. 
Macropteroiis: having fully developed wings. 
Maculate: spotted with figures of some size and of a color differing from the 
background. 
Mandibles: the anterior or upper lateral jaws of a chewing insect. 
Maxilla (-ae): the second pair of jaws of a chewing insect : 'second maxillae' = 
labium, = third pair of jaws. 
Median carina: usually applied to the median ridge of the pronotum. . 
Melanism: an abnormal suffusion with blackish. 
Mentum: a median sclerite of the labium. 
Mesial: median; refers to the median plane of the body or an appendage. 
Mesonotum: the dorsal part of the middle or second portion of the thorax. 
Mesosternal lobes: the lateral portions of the mesosternum, separated in 
the median line (m. interspace) by a forward-projecting part of the 
metasternum. 
Mesosternum: the mid- ventral sclerite of the middle portion of the thorax. 
Mesostethium: the entire ventral aspect of the mesothorax. " Mesostethium 
and metastethium together" include "the whole ventral aspect of the 
mesothorax and metathorax as seen from below, regardless of limitations 
of sclerites." — t. Scudder. 
Metanotum: the dorsal part of the third or hinder portion of the thorax. 
Metastethium: see mesostethium. 
Metazona or metay.one: the dorsal surface of the pronotum behind the principal 
sulcus. 
Metepisternum: episternum of the metathorax, the more anterior of the 
lateral sclerites of that segment. 
Molt, moidt: the act of shedding the skin or external layer of the body-wall, 
marking the change from one stage of the insect to the next ; the cast-off 
skin thus shed. 
Mouth-parts: a term applied to the movable structures around the mouth, 
used in eating. 
Notum: the dorsal or upper surface, applied either to a segment or to the 
entire body. 
Nymph: a term applied to the immature stages of insects with incomplete 
metamorphosis. The last stage, showing conspicuous wing-pads, is 
frequently but erroneously called a pupa. 
Obconic: conical with the large part apical. 
Occiput: the dorsal hinder part of the head. 
Ocellus (-i) : a simple eye ; these vary from one to three in number in adult 
insects and are usually placed in front of and between the compound eyes. 
Ochraceous: brownish yellow of various shades. 
Ootheca: the horny capsule containing the eggs of Cockroaches. 
Operculum: a spoon-shaped sclerite beneath the eighth segment of the 
abdomen of Walking-sticks. 
