USED IN ENTOMOLOGY. 79 



Masticate: to chew. 



Masticatory: formed for chewing or grinding; applied to the mouth parts 

 and to the grinding structures in the gizzard. 



Mastigium -ia: telescopic anal organs in certain caterpillars, serving to 

 repel attacks of parasites. 



Matrix: the formative substance from which cells and other structures are 

 derived. 



Maxilla: without any qualifying adjective, the second pair of jaws in a 

 mandibulate insect ; the most persistent when the mouth is modified, and 

 represented by some functional part in all insects in which the mouth 

 structures are useful : second maxillae, = the labium or third pair of jaws 

 in a mandibulate insect. 



Maxillary: attached or belonging to the maxilla; e. g., palpi. 



Maxillary palpi: the first pair of palpi, borne on the maxilla. 



Maxillary pleurites: the lateral pieces, epimera and episterna of the maxil- 

 lary segment. 



Maxillary segment: the sixth segment of the head, bearing the maxillae. 



Maxillary tendons: two slender rods in basal third of the muscid proboscis; 

 the remnant of the palpifer, to which muscles for flexing the proboscis are 

 attached : see lora. 



Maxillary tentacle: in female Pronnba; a specialized process of palpifer. 



Maxillulas: a pair of appendages in Thysanurids, between mandibles and 

 first maxillae. 



Maxime: very much or very large. 



Mealy: with a flour-like dusting: == farinose. 



Mecaptera: =Mccoptera; q. v. 



Meconium: the substance excreted by certain metabolic insects soon after 

 their emergence from the chrysalis or pupa. 



Mecoptera: long-winged: neuropterous insects with similar, large, unfolded 

 wings ; mouth mandibulate, prolonged into a beak ; head free ; thorax ag- 

 glutinated ; transformations complete : the scorpion flies or Panorpidce. 



Medi-: prefix, = middle. 



Media: the fourth of the longitudinal veins extending from base through 

 approximately the middle of the wing, not more than four branched, the 

 branches numbered on margin from 1 nearest apex to 4 nearest anal 

 angle: in Orthoptera, it is the median or externomedian : in Lepidoptcra 

 (Pack.), is cubitus 1 (Comst.). 



Mediad: toward the median plane or middle. 



Mediafurca: a process extending internally from the mesosternum, to which 

 the muscles are attached. 



Medial: referring to, or at the middle. 



Medial cells: (Comst.), are anteriorly bounded by the media or its branches: 

 in Hymenoptcra (Nort.), includes median and cubital (Comst.). 



Medial cross-vein: (Comst.) is between media 2 and 3. 



Median 1: in Lepidoptcra (Pack.), = media 2 (Comst.). 



Median 2: in Lepidoptcra (Pack.), = media 3 (Comst). 



Median 4: in Lepidoptcra (Pack.), = cubitus 2 (Comst.). 



