USED IN ENTOMOLOGY. Si 



Medio-cubital cross-vein: between media 4 and cubitus i, connecting the two 

 series (Comst.). 



Medio-ventral line: in caterpillars, extends along middle of under side. 



Medipectus: the under side of meso-thorax : the mesosternum. 



Mediproboscis: the middle third of the flexed proboscis of muscid flies. 



Medi-thorax: = me&othorax ; q. v. 



Medius: middle. 



Mega- Megalo-: large. 



Melanic: with a blackish suffusion. 



Melanism: an abnormal or unusual darkening: a suffusion with blackish. 



Mellifera: honey -makers : applied to bees as a whole. 



Melliferous: honey-producing, or producers of honey. 



MellisugOUS: honey-sucking: a feeder on honey. 



Member: any one of the external appendages. 



Membranaceous: thin, skin-like, semi-transparent, like parchment: of a thin, 

 pliable texture. 



Membrana retinens: the stretched part of the membrane around the rectum 

 of butterfly larvae, used in the change to the chrysalis. 



Membrane -ana: any thin, transparent, flexible body tissue: specifically the 

 wing tissue between the veins : in Heteroptcra, the thin membranous tip of 

 the hemelytra. 



Membranous or eous: composed of membrane or skin-like tissue. 



Membranule: the small opaque expansion at base of wings in Odonata. 



Meniscoidal: with one side concave the other convex, like a round segment 

 from a hollow sphere. 



Menognatha: insects in which botli young and adults feed by mandibles; e. g.. 

 the Orthoptera: see menorhyncha and metagnatha. 



Menorhyncha: forms in which both young and adult take food by suction; 

 e. g., Hemiptera : see menognatha and metagnatha. 



Mental suture: in Coleoptera. the line between mentum and gula. 



Mentigerous: bearing or having a mentum. 



Mentum: a labial sclerite bearing the movable parts; attached to and some- 

 times fused with the sub-mentum ; corresponds to the (united) stipes of 

 maxillae : in Colcoplcra, what is usually called mentum is really submentum : 

 in Diptera, the term is applied to the posterior oral margin : in Hymenoptera, 

 is part of " tongue," the second joint bearing the labial palpi, paraglossae 

 and ligula. 



Merdivorous: feeding upon dung or excrement: see scatophagous. 



Meriseum: the posterior inflected part of the metasternum in Coleoptera. 



Meroistic: ovaries that secrete yolk or vitellaginous cells as well as ova. 



Mesad: extending or directed toward the median plane. 



Mesal: pertaining to, situated on or in the median plane of the body. 



Mesenchym: that portion of the mesoderm that produces the connective tis- 

 sues of the body. 



Mesenteron: the mid-gut, stomach or chylific ventricle: the middle portion of 

 the primitive intestinal canal, lined with entoderm. 

 6 



