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 

 inandibulate 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 inandibulate 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 maxillary- 

 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 Pronuba; a specialized process of palpifer. 



Maxillulae: 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: = Mecoptera, 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 Panorpida. 



Medi-: prefix, = middle. 



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

 proximately 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 Orthoptcra : it is the median or externomedian : in Lepidoptera (Pack.), is 

 cubitus 1 (Comst.). 



Mediad: toward the median plane or middle. 



Mediafurca: a process extending internally from the meso-sternum. 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 Hymenoptera (Nort.), includes median and cubital (Comst.). 



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



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



Median 2: in Lepidoptera 1 Pack.), = media 3 (Comst.). 



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



